The Milky Way galaxy with a trail for every nebula in the galaxy using our upcoming physics architecture improvements. Currently, trails are only shown for some nebulae due to performance limitations. The colors show how many times the orbit of a nebula must be computed to maintain physical accuracy. Blue means fewer computations, while red means more.

We're working to give you more power to understand and control the complex phenomena of the universe. Our roadmap for 2023 includes simulating the lakes of liquid methane on Titan, hot planets emitting light, and realistically colliding spacecraft and bananas. But before we dive in, let's recap some accomplishments from last year.


Demonstrating highlights from 2022, including the Force Spin tool, Settle Water button, and Auto Simulation Speed.

In 2022, we put out 9 updates for Universe Sandbox. These included many new features, but some of our favorites are

• Spinning up planets so fast they break apart using the new Force Spin tool
  
• Exploring constellations for 10 different cultures
  
• Customizing the look and topography of planets and moons with a library of realistic color and height maps
  
• Fundamental improvements to our planetary collision system

Check out our 2022 Retrospective for more on what we did last year.

• Add more materials for constructing & simulating planets & atmospheres
  
• Overhaul our under-the-hood physics architecture to improve accuracy and performance
  
• Simulate light emission from hot planets
  
• Continue work on bringing Universe Sandbox to phones and tablets
  
• Improve our development tools to identify issues quickly and provide a more bug-free experience

Many of our projects, like bringing Universe Sandbox to phones and tablets, have been in development for months or years. While we plan to work on everything we discuss here in 2023, complications may cause features to be delayed, and our priorities may change.


Titan with realistic lakes of liquid methane. Titan’s properties include the amount of methane and the percentage in each phase (solid, liquid, and gas). Material colors are manually adjusted to help see the lakes. This feature and interface are a work in progress.

We’re expanding the number of materials in Universe Sandbox you can use to simulate, construct, and terraform planets and atmospheres realistically. For example, new materials like methane will allow us to fully simulate lakes of liquid methane on Titan. We’re also adding advanced simulation to compute planet radii based on the pressure and temperature of each material in the planet’s composition. Ever wonder how big the Moon would be if it were made entirely of oxygen? Soon you’ll be able to find out.

• A (Multi) Material World
  
  • Planet radii and atmospheres will be realistically simulated based on the mass and phase (solid, liquid, and gas) of each material in their composition.
    
  • Simulation of an atmosphere’s heating (the greenhouse effect), color, and opacity, including Venus-like atmospheres, will be based on their material composition.
    
  • Designing the properties, data views, and tools for you to construct atmospheres, build and terraform planets, and track these materials is a crucial part of our development process.
  
  This graph shows the calculated density of the materials of Earth based on their depth. You can see the density of Earth increases as you move towards its core. The cut-away view of Earth shows the individual materials, temperature, and phase of each material from the inside out. This feature and interface are a work in progress.
  
• Physics-based Phases
  
  • The phase of each material in a planet’s composition will be realistically determined based on its pressure and temperature. Make a planet entirely out of water and see the phases from the inside out (our current model says it would be 100% liquid inside).
    
    • Material phase models are based on geological and astrophysical measurements and research.
  • Planet radii will then be calculated based on the phase and density of each material that makes up a planet’s composition. If you change the composition, the radius will change with it.
  
  Liquid materials added to the surface of a planet with the Planetscaping tool will blend over time. Artificial coloring is used here to help differentiate materials. This feature and interface are a work in progress.
  
• Tracking Materials
  
  • Materials will have customizable colors based on their physical properties that will blend on the surface of objects. Watch oceans of methane mix with oceans of oxygen in real time.

While many moons orbiting Earth and colliding are beautiful, the more objects in a simulation, the more computationally demanding it is.

Our project to add everyday object collisions, like throwing a banana at a car, led us to first rewrite our physics architecture. Realistically smashing satellites together is part of continuous efforts to improve the realism and performance of Universe Sandbox.

• New Physics Architecture
  
  • Overhauling our custom N-body (gravity) simulation will improve gravity-related accuracy, stability, and performance. Tight orbits like the Hubble Space Telescope around Earth should be stable at simulation speeds as high as a month per second (instead of a few days).
    
  • These updates are the foundation for future physics improvements, like spaceships.
  
  Before - Our current gravity simulation has small inaccuracies, so the trails of these moons don't show a fish.
  

  
  After - Improvements to our gravity simulation allow these moons to orbit with trails that clearly show a fish.
  
• Everyday Object Collisions
  
  • Currently, when objects collide, they're treated as spheres. We're working on adding new physics so that everyday objects, simple shapes like dice and pyramids, but also complex shapes like sledgehammers and spacecraft, will collide according to their unique forms. This is often known as rigid body collision physics.
• Improved Planetary Collisions
  
  • We’re researching methods to allow objects to stretch and deform, like two fluids mixing, during collisions, to improve upon the sphere absorbing method we currently use. Stay tuned for a status update later this year.
• Meteors & Shooting Stars
  
  • To simulate meteors and shooting stars, we’re working on allowing objects to burn up while traveling through a planet’s atmosphere. We’re exploring ways of applying this drag force to objects passing through gas clouds and liquids too. Currently, atmospheres have no effect on objects as they pass through them.
  
  A meteor burns up as it flies through Earth’s atmosphere. Adding atmospheric drag is a work in progress.
  
• Advanced Game Engine Features
  
  • As an ongoing project to optimize our simulation, we’re transitioning to the Data-Oriented Technology Stack (DOTS) from Unity, the game engine we use to build Universe Sandbox. We’re excited about the expected performance gains.

As moons collide, they get hot enough to glow and emit light on the surrounding moons. Non-stellar objects emitting light is a work in progress.

We want to light up the universe - by allowing hot planets and moons to emit light. We’re also planning a massive graphics overhaul that will change how you see the Universe (Sandbox).

• Light ‘em Up
  
  • Light - it’s not just for stars anymore. Hot planets will emit light based on their temperature so you can light up your simulation by setting Earth to 1000 °C.
    
  • This lighting system will eventually allow you to place and customize lights anywhere in the simulation so you can illuminate your universe without stars.
• Untitled Graphics Overhaul
  
  • We don’t want to say too much yet, but we’re working on a massive update to our graphics system that the whole team is very excited about.

The first step of the Welcome to Universe Sandbox guide playing on a smartphone in portrait mode. Universe Sandbox on phones and tablets is a work in progress and is still being developed.

We’re stepping up our development for Universe Sandbox on mobile devices (for iOS and Android) after some delays last year. You can read about our plans in our first Mobile DevLog, and be on the lookout for more updates in the future.

• Small Screen Experience
  
  • The primary obstacle in mobile development is adapting our interface that works well on a large screen to work on a small touch screen (like a phone).
    
  • We’re building a system to intelligently resize, hide, and reveal panels as needed. Our goal is to reduce the need for you to spend time managing the user interface so you can focus on bending the simulation to your will.
• All of the Above
  
  • Universe Sandbox on mobile is built from the same codebase as the desktop version and will have the same features.
    
  • Performance is also critical, and we’re working to make Universe Sandbox run smoothly on mobile devices no matter the simulation.

An initial selection of scenes we’re considering for our new in-game Universe Sandbox trailer. Our new trailer is a work in progress.

We’re creating new internal tools to make developing and releasing updates of Universe Sandbox faster. These include systems to analyze your feedback and automate testing for bugs and issues.

• Testing 1, 2, 3
  
  • Creating tests that run automatically to check our collision physics, simulation performance, and more will help us catch issues before they’re released. These tests record data and images we can use to find bugs more easily.
• Tracking Feedback
  
  • Your in-game feedback and issue reports help us improve Universe Sandbox, and there’s a lot to review. We’re transitioning to a new system to sort and analyze your feedback more efficiently.
• Building the Sandbox
  
  • We’ve revamped our automated build system. This system creates a new version of Universe Sandbox in the cloud every time a change is made by one of our team members.
    
    • This automation saves each of us 10-15 minutes each time we want to review a change.
  • With a single button, we can also release new updates to all digital stores that sell Universe Sandbox. This process used to take many hours and involved dozens of manual steps, so this makes it possible to release more updates faster.
    
  • This new system easily makes versions of Universe Sandbox we can test on phones and tablets (iOS and Android) too.
• New Trailer
  
  • We’re producing a new Universe Sandbox trailer fabricated entirely in-game. We’ll be able to capture it with a single button press, making it easier to iterate on the trailer over time to show off the latest features and improvements.
    
  • You will be able to play this new trailer inside Universe Sandbox, breaking out of it to experiment or explore every shot and simulation.

A habitable planet with vegetation that dies off after an asteroid impact. Vegetation response to temperature is already implemented, but in the future, additional factors beyond collisions will impact vegetation habitability.

We’re always thinking about the future of Universe Sandbox. Our longer-term goals include gamepad support, life simulation, and more planet customization options. These are still in early development, and we don’t have a timeline for their release (because software development is hard, and not even our astrophysicists can predict all of the complexities of simulating the universe).

• Custom Textures
  
  • We want to give you more control over the appearance of your planet. Satisfy your world-building desires by creating a planet using custom maps or images, like a picture of your dog.
• Gamepad Support
  
  • What could be better than playing Universe Sandbox from the comfort of your couch? We’re working on adding gamepad support for more ways to control your universe. This will improve our Steam Deck support and has the potential to support other gamepad-based systems in the future.
• Life Simulation
  
  • Our expanded materials improvement is the cornerstone of our plans for life simulation. Once Universe Sandbox includes the essentials for life, like oxygen and carbon dioxide, we will be able to explore simulating simple life that will spread across the surface of a planet.

We’re excited for the year ahead and can’t wait to make Universe Sandbox even better!

Watch a green comet pass by Earth for the first time in 50,000 years, see an asteroid swing by Earth in one of the closest ever encounters, and explore a hypothetical planet from the 1800s disproven by Einstein’s theory of relativity. Speaking of comets, asteroids, and planets…

A comet, an asteroid, and a hypothetical planet walk into the Solar System. The hypothetical planet says to the comet, “Why so green?” The comet says, “It’s the radiation from the Sun evaporating the carbon on my surface. You’d know that if you were as close to the Sun as people thought you were.” The hypothetical planet turns red with anger and ceases to exist. The asteroid says, “Phew, that was a close one!”


[h4]A Green Comet[/h4]
The green comet, C/2022 E3 (ZTF), recently passed by the Earth for the first time in 50,000 years. Explore its path and watch this once-in-a-lifetime event occur over and over with our new simulation
The Green Comet C/2022 E3 (ZTF) in 2023


[h4]Close Encounters of the Asteroid Kind[/h4]
Asteroid 2023 BU performed a close pass of Earth (though it posed no threat), only 2,200 km from the surface. That’s just under half the length of the United States! Watch one of the closest asteroid encounters ever recorded in our new simulation 
Asteroid 2023 BU Close Encounter in 2023


[h4]The Non-Existent Planet[/h4]
In the 1800s, many astronomers thought there was a planet, dubbed Vulcan, between Mercury and the Sun. Mercury’s orbit was observed to wobble slightly more than predicted, and Vulcan was hypothesized to explain this. We now know Vulcan does not exist, and general relativity causes the additional wobble, but you can see Vulcan’s proposed orbit in the new simulation
Hypothetical Planet Vulcan


[h4]More Highlights[/h4]
Landing (press "c") on the surface of a planet now always points you toward the horizon. Taking off returns you to your previous position instead of in front of the planet.



On February 3, 2023, astronomers announced the discovery of 12 more moons orbiting Jupiter. Learn about these new moons in our new simulation
Jupiter’s New Moons 2023
Or explore the history of the discovery of all of Jupiter’s 92 moons in our guide
History of Jupiter’s Moons



We added a Spherical Cow to Universe Sandbox! This refers to a joke that when physicists want to make a problem easier to handle, they sometimes simplify it so much it’s no longer realistic.



Experience 100 spherical cows hitting Earth at lightspeed in our new sim
Earth & 100 Spherical Cows at the Speed of Light
Because why not?


Check out the full list of What's New in Update 32.2

Please report any issues on our Steam forum, on Discord, or in-game via Home > Send Feedback.

We’re excited about our plans for 2023, including adding more materials to planets as well as improvements for our physics simulation, but we’ll dive into our roadmap in an upcoming post. First, let’s reflect on some of our accomplishments from 2022.

[h5]New team member[/h5]

Last year, Conrad joined the team as our User Interface Engineer. Since then, Conrad has been adding interface controls for object customization, fixing general usability issues, and helping to make our user interface easy to use on small screens in preparation for Universe Sandbox on mobile.

[h5]New guides and fly-by simulations added to Universe Sandbox in 2022[/h5]

We added new guides on object customization and a simulation of NASA’s DART mission. This ambitious mission tested humanity's ability to deflect asteroids away from Earth by intentionally crashing a satellite into an asteroid and accurately predicting the change in the asteroid's orbital period.


[h5]Significant updates to Universe Sandbox[/h5]

• Consistent Collisions, James Webb, & Planetscaping Tweaks | Update 29.1
  
  • JWST is now in Universe Sandbox, and there’s an eyedropper for the Planetscaping tool
• Hit Hard, Spin Fast | Update 30
  
  • The new Force Spin tool allows you to spin apart planets with the newly implemented centrifugal force
    
  • Collisions between spinning and equal-size objects are more realistic than ever before
    
  • The habitable zone is now simulated using the selected planet's properties, and the Hubble Space Telescope is now in Universe Sandbox
• Constellations | Update 31
  
  • Explore constellations for 10 different cultures
    
  • Object glows now correspond to how hot an object is
• A Warmer Welcome | Update 31.1
  
  • Our welcome guides have been overhauled so you can discover the infinite power to create and destroy in Universe Sandbox
• Upgrading Our Engine | Update 31.2
  
  • We updated Unity, the game engine we use to create Universe Sandbox, to allow us to utilize new features for future improvements
    
  • Instantly see where water will flow on a planet with the new Settle Water button
• Planetary Defense DART | Update 31.3
  
  • Many collision improvements and a simulation of NASA’s DART mission, which intentionally collided the DART spacecraft with the asteroid Dimorphos, changing its orbit & testing humanity’s ability to protect Earth from future asteroids
• Space is Big | Update 31.4
  
  • Units of measurement have been updated to help you better understand the vastness of space
• Build-A-Planet | Update 32
  
  • Customize and manipulate the appearance and elevation of planets using any of the in-game visual and elevation maps
• Skies of Blue, Red Collisions Too | Update 32.1
  
  • Collision shockwaves are now more realistic, and we added basic Rayleigh scattering to atmospheres
    
  • The simulation speed can automatically adjust itself based on various conditions, like nearby objects and collisions, by turning on Automatic Simulation Speed

View our “What’s New” for a chronological list of changes.



[h5]Preview versions uploaded in 2022[/h5]

Your playtesting of our preview versions (previously called community test builds) gives us valuable feedback for improving features in active development. A huge thanks to our wonderful community for all their help.

[h5]Highest number of concurrent users in Universe Sandbox in 2022[/h5]

The highest number of concurrent users we’ve ever had was almost in 2022: 648 on December 24, 2021. We’ve already beaten the highest number this year, but you’ll need to wait for the next retrospective to see it.

[h5]Positive Steam reviews in 2022[/h5]

We’re truly humbled that we are still rated “Overwhelmingly Positive,” both recent and all-time on Steam (over 96% of reviews are positive). Your support and feedback are truly appreciated and help make Universe Sandbox even better.


[h5]Code commits, or changes, made to the Universe Sandbox project in 2022[/h5]

The most code commits occurred during the week of May 8, when 65 commits were made. While a single commit can be as small as fixing a typo, some of them have been whole new features.


[h5]Files uploaded on our team messaging app[/h5]

These are files we share with each other via Slack and include screenshots and videos of features in progress, log files for resolving issues, and astronomy jokes.

Image by Andrés J. Colmenares from wawawiwa comics

[h5]Discord users on our server at the end of 2022[/h5]

It’s great to see your creations and constructive discussion on our server, which has grown by over 22.5% in the last year. Join us on Discord.

[h5]Simulations shared in the Universe Sandbox Steam Workshop in 2022[/h5]

That's more than 25 simulations shared every single day! You all continue to use Universe Sandbox in ways we could never have imagined, and we can’t wait to see what you make next.

[h5]Messages sent on our team messaging app[/h5]

Giant Army has been entirely remote since its founding in 2011, and with 13 team members across 3 continents and 6 time zones, messaging on Slack is how we get most of our work done.

[h5]Times the Welcome to Universe Sandbox guide was played[/h5]

Whether you’re a new player or just wanted to check out the reimagined welcome guides we released last year, we hope you enjoyed learning about the beauty of our universe. You’re using that knowledge responsibly, right?


[h5]Times the Planetscaping tool was used in 2022[/h5]

Letting you shape and customize planets is integral to the spirit of Universe Sandbox, and we’re glad you’re experimenting with the power that comes with it.


[h5]Times supernovas went off in Universe Sandbox in 2022[/h5]

Astronomers estimate there will be 1 supernova in the Milky Way every 100 years. They also think there are about 100 billion galaxies in the universe. Assuming all galaxies have a similar number of supernovas to ours, there are about a billion supernovas in the universe each year. We got about 0.1%* of the way there in 2022. Let's see if we can get closer in 2023!

*Thanks to Steam user Nantes for pointing out that the original value of 1% was wrong, and this should be 0.1%


[h5]Times the top played simulations of 2022 were opened*[/h5]

The top 10 sims of 2022 were:

*not including creating a new simulation or the Solar System simulation that opens when you start Universe Sandbox

Check them out to see what all the fuss is about!


[h5]Times the Force tool was used in 2022[/h5]

Whether you were giving planets a gentle nudge, slightly adjusting their rotation, or spinning them apart, we know you were forceful in your efforts.


[h5]New simulations were created in Universe Sandbox in 2022[/h5]

That’s about the same number as last year, with a new simulation created every 5 seconds.

[h5]Times a simulation was played or paused in 2022[/h5]

By far the most popular thing to do in Universe Sandbox in 2022 was to play or pause a simulation. That’s about once every second.

More materials for building planets and their atmospheres, physics simulation performance improvements, non-star objects emitting light based on their temperature, and more are in store for 2023. Be on the lookout for our 2023 Roadmap, which will have more details about our plans for this year.

This is a work in progress

Thank you. Your continued encouragement and support let us keep simulating the universe more realistically year after year. We are so grateful for your suggestions, feedback, and kind words. The simulations you create continue to impress us, and we want to continue improving Universe Sandbox to expand your creative (and destructive) capabilities. There’s so much to do, and we can’t wait to do it!

The Universe Sandbox Team
Dan, Chris, Georg, Jonathan, Rappo, Mat, Jacob, Erika, Brendan, Anders, Brent, Pavel, and Conrad

Collision shockwaves and atmosphere colors are more realistic, camera motion is smoother, and you can try the new Automatic Simulation Speed, which adjusts the simulation speed based on what’s happening in the simulation. Never miss a collision again!


Energy from collisions spreads more realistically over the surface of an object, resulting in larger shockwaves. Heating from collisions is also less concentrated and spreads over a larger area. Previously, shockwave expansion ended abruptly in a smaller area, often resulting in blue-hot impact sites.

The dwarf planet Ceres colliding with Earth
The Moon colliding with the Earth
Allow the simulation speed to adjust itself automatically based on various conditions, like nearby objects and collisions, by turning on the new Automatic Simulation Speed feature. Automatically speeding up and slowing down the simulation speed provides an improved viewing experience for collisions, orbits, explosions, and more.

This feature is still in active development and is currently off by default. Turn it on under
Settings > General > Experience > Auto Simulation Speed



The simulation speed will slow down to show collisions that you might otherwise miss
Create a more cinematic experience while watching simulations like Earth & 100 colliding moons
Object atmospheres now visually simulate Rayleigh scattering, which describes how light scatters in the atmosphere. Rayleigh scattering is what makes Earth’s daytime sky appear blue and the setting Sun appear red. Adjust the strength of the scattering under
Visuals > Atmosphere > Rayleigh Scattering Strength

Earth with realistic Rayleigh scattering
Custom object with Rayleigh scattering at 85% strength
Your view now smoothly rotates, or pans, to focus on an object instead of sliding the view left or right, like a camera on rails

Atmospheres are now visible from the surface of planets. Land on a planet by pressing “c” on your keyboard to check it out.
Check out the full list of What's New in Update 32.1

Please report any issues on our Steam forum, on Discord, or in-game via Home > Send Feedback.

Customize the look and topography of planets and moons with a library of realistic color and height maps. Turn Earth into Mars or mix-and-match maps to create your own worlds.



Blend, shift, and flip any two of the elevation maps in Universe Sandbox to create your own custom surface that governs water flow, temperature simulation, and more. Learn more
Guides > Tutorials > Creating Planets from Scratch & Transforming Planets


Change the surface map of any planet to match other planet images included in Universe Sandbox.


Change the apparent difference between high and low elevation, also called the normal map, under
Visuals > Elevation > Exaggerated Terrain


Invert a planet’s elevation with the push of a button under
Surface > Elevation > Elevation Map > Flip



View a planet's simulated surface without high-resolution corrections under
Properties > Visuals > Enhance Surface Detail
Turning off the enhanced view shows the map resolution we use for simulating object surfaces, including water flow and snow.



Turn off the visual glow from high temperatures, also called blackbody radiation, under
Properties > Visuals > Heat Glow



This update includes 9+ additions and 3+ fixes and improvements.

Check out the full list of What's New in Update 32

Please report any issues on our Steam forum, on Discord, or in-game via Home > Send Feedback.

“Space is big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space.”

    - Douglas Adams, The Hitchhiker's Guide to the Galaxy

And now we’ve made it a bit easier to comprehend the scale of space.

The unit of measurement selection menu now explains what each unit means to help you better understand the vastness of space. Unit names based on the properties of other objects (like Earth mass) have also been updated for clarity.

On September 29, 2022, the Juno spacecraft performed a flyby of Jupiter’s moon Europa, coming within 352 kilometers and taking the highest-ever resolution close-up image of the moon’s surface. Watch this close flyby in our new simulation
Juno Flyby of Europa in 2022


You can now view and monitor the data views for all objects in a simulation at once, also called the Atlas, by going to Open View Panel Settings > 2D Settings > Show All Maps Atlas. The interface for this type of view is a work in progress.


Object holograms have been updated to look the same, be more visible across different backgrounds, and clearly show their positions in front of or behind other objects
This update includes 4+ additions and 15+ fixes and improvements.

Check out the full list of What's New in Update 31.4

Please report any issues on our Steam forum, on Discord, or in-game via Home > Send Feedback.

Stars have different naming formats, from Altair to HR 4623, as shown in the Nearest 400 Stars simulation in Universe Sandbox.

You’ve probably heard of the star Betelgeuse. It’s the second brightest star in the constellation Orion and made headlines in 2019 when it dimmed very quickly (don’t worry, it’s back to normal now). But have you heard of the star HR 2061? What about HIP 27989? You may not have heard of them, but they’re just different names for Betelgeuse!


In the constellation Orion, Betelgeuse is roughly where Orion’s hand would be.

Why do some astronomical objects have multiple names? Thousands of years ago, there were no rules for how to name them, and different cultures had different names for stars. Many familiar star names come from Arabic, including Betelgeuse, whose Arabic name (which was most likely Yad al-Jauzāʾ and translates to “the hand of al-Jauzā’”) references its position in the constellation Orion.



Nowadays, humanity has observed billions of astronomical objects, and it would be very inconvenient to give them all individual names. Instead, astronomers follow a set of rules set by the International Astronomical Union (IAU), including

• Objects outside the Solar System are named using an acronym, which refers to the catalog name (such as “HIP” for the Hipparcos Catalog), followed by an identification number
  
• Dwarf planets beyond the orbit of Neptune are named after a deity or figure related to creation myths (like Makemake)
  
• Minor planets can be named by the person who discovered them after a formal review. If not named, minor planets are given only a sequential identification number. The ID number for the minor planet Mr. Spock (which you can find in Universe Sandbox) is 2309.
  
• Comets are named based on the type of comet (P for periodic, C for not-periodic), the year they were discovered, a letter for the half of the month they were discovered in (for example B for the second half of January), and then another number indicating the order of discovery. P/2005 S2 is a periodic comet discovered in 2005 that was the second comet discovered in the first half of October.

These rules, while complicated, make it much easier to reference objects in large catalogs, like the Yale Bright Star Catalog. This catalog, which is included in Universe Sandbox, contains 9,110 stars visible to the naked eye from Earth and uses the letters “HR” as a reference to its original name, the Harvard Revised Photometry Catalogue, which came out in 1908. Current space telescopes like Gaia have observed and cataloged over 1 billion astronomical objects, showing how valuable these naming rules are!

The same objects are often part of multiple astronomical catalogs, with a different name for each catalog. Betelgeuse, for example, has 46 different names! While databases like SIMBAD collect these different names in one place, sorting through them can be difficult.



Universe Sandbox contains a database of over 45,000 known astronomical objects sourced from different catalogs, including the Open Exoplanet Catalog. While this is small compared to the billions of known astronomical objects, including all of them would make Universe Sandbox quite large (the Gaia catalog alone is over a terabyte of data).

If you want to find Betelgeuse in Universe Sandbox, you can search for Betelgeuse, HR 2061, or HIP 27989 and find it under the searched name. In the future, we plan to allow you to view all of the names that a star has in its properties, but for now, each object can only show one name at a time.


Three Betelgeuse’s each with a different astronomical name

For now, try checking out some Solar System objects with interesting name origins in Universe Sandbox

• C/1906 E1 - The “C/” designates this as a non-periodic (only passes by the Sun once) comet. 1906 is the year of its discovery, and E1 means and was the first comet discovered in the first half of March (between March 1-15)
  
• Haumea - A dwarf planet named after the matron goddess of the island Hawai’i
  
• 2014 NW65 - A yet-unnamed minor planet. 2014 is the year of its discovery, N means it was discovered in the first half of July (between July 1-15), and W65 means it was the 1647 object found during that half month.

To join our community discussions, please join us on our Steam Forum and our official Discord community.




Gaia DR2 4152993273702130432 is the designation for the star UY Scuti, one of the largest known stars, in the Second Data Release (DR2) of the Gaia catalog. Here “UY” doesn’t stand for a survey but instead follows a different set of IAU naming rules for variable stars. Scuti means that the star is located in the constellation Scutum, and UY indicates it was the 38th variable star discovered within this constellation.

Variable star labeling starts at R, S, etc., and goes through Z (9 labels total), then goes to RR through RZ (another 9 labels), then SS through SZ (8 more labels), until we get to ZZ. This is why UY is the 38th; 9 (R-Z) + 9 (RR-RZ) + 8 (SS-SZ) + 7 (TT-TZ) + 5 (UU-UY) = 38. Wow, this gets complicated quickly.

If more labels are needed, after going to ZZ, it starts over at AA going through AZ, then BB to BZ, and up to QQ through QZ for a total of 334 unique names for variable stars within a single constellation.


Stellar size comparison showing how much bigger UY Scuti is than other well-known stars.

NASA’s DART mission will intentionally collide the DART spacecraft with the asteroid Dimorphos, attempting to change its orbit & testing humanity's ability to protect Earth from future asteroids. Check out our simulation of this mission:
Open > DART: Humanity's First Planetary Defense Experiment

Fragment temperature and glow from collisions are now realistically based on the collision energy. Low energy collisions, like the one shown here, don’t generate enough energy to make the particles glow.


Camera transitions after the target collides are smoother


Explosions now create rock fragments and dust clouds


Under-the-hood improvements to make referencing known objects more reliable



This update includes 1+ additions and 20+ fixes and improvements.

Check out the full list of What's New in Update 31.3

Please report any issues on our Steam forum, on Discord, or in-game via Home > Send Feedback.

Today, August 24, 2022, marks the seventh anniversary of Universe Sandbox’s Early Access launch on Steam!

To celebrate, Universe Sandbox is on sale for another 120 hours (that’s until August 29). Pick up a copy for yourself or a friend today.

Over the last seven years, we’ve added tons of new features to make Universe Sandbox better than ever, and we’re still going strong. Our current development plans include

• Adding more materials to simulate planetary features lakes of liquid methane on Saturn’s moon Titan
  
• New rigid body physics for more realistic interactions between objects like bowling pins and satellites
  
• More realistic planetary collisions

Learn about what we’re working on in our 2022 Roadmap
https://store.steampowered.com/news/app/230290/view/4963541146758964452

All of this would not be possible without the support of our community. You all use Universe Sandbox in ways we could never have imagined, and we are so grateful for all of you. Here’s to another amazing seven years.

We’ve updated Unity, the game engine we use to create Universe Sandbox. While you won’t see immediate changes, this will allow us to utilize new features for future improvements to our physics simulation.


Use the Settle Water button to immediately stabilize the water level of a planet.




Control the lowest temperature of space with the Background Temperature. By default, this is set to 2.73 Kelvin to approximate the Cosmic Microwave Background. Adjust it under
Simulation > Advanced Simulation Settings > Temperature > Background Temperature



Random object icons in the Add tool have been updated

Learn about habitable zones and how Universe Sandbox models them in our guide
Guides > Science > Habitable Zones



Stellar collisions now partially merge and transfer mass before going supernova

Collision shockwaves are now realistically circular

Particles now collide more consistently, and gas cloud momentum is now transferred to and from impacting objects



This update includes 3+ additions and 27+ fixes and improvements.

Check out the full list of What's New in Update 31.2

Please report any issues on our Steam forum, on Discord, or in-game via Home > Send Feedback.