BIG UPDATE in 3D Galaxy Merger and Merging Black Holes simulations: GALAXIES BUILT ON REAL PHYSICS Spiral arms and bars now grow from each disk's own gravity. Gas forms new stars, and central black holes feed, flare as quasars, and blow the gas away. WILL ANDROMEDA HIT US? The latest Hubble and Gaia data make the famous collision a coin toss. Each run draws a new future for the Milky Way, Andromeda, Triangulum and the Large Magellanic Cloud. REAL BLACK HOLE MERGERS Start from GW150914, LIGO's first detection, or place real black holes from stellar to supermassive. Mergers now radiate mass away, spin up, and ring down. SEE GRAVITATIONAL WAVES Violet spirals race out at the speed of light, crowding closer as the pair spirals in, then a bright ring at the merger. Tap Waves to step back and watch.

SUNLIGHT AND SHADOWS Planets and debris now have a sunlit day side and a dark night side. Bodies cast shadows on each other and across Saturn's rings. IMPACT GLOW Debris heated past 1,000 K now casts its glow on the planets, debris and ring particles around it, so you can see where an impact is hottest. ORIGIN OF SATURN'S RINGS Two icy moons collide near Saturn. Follow the ice for a day and see how much falls inside the Roche limit to settle into rings.

Introducing the Origin of Saturn’s Rings, a new scenario in the Cosmic Collisions simulation

Introducing Cosmic Collisions, an optimized 3D SPH Sandbox where you can collide planets in the Solar System.

Introducing Impact Crater, where you can see how big a meteor crater would be if Apophis (or a bigger asteroid) hit Earth.

Hotfix: Planet shader in the 3D SPH Sandbox simulation

Blast off with Space Academy, an interactive game where you'll master speed, velocity, acceleration, free fall, vectors, and projectile motion.

+ Optimizing the Space Weather simulation + Adding more than 1,000 new comets to the Comet Tails simulation

Introducing Solar Watch, a game that helps you learn about solar wind, Earth’s magnetosphere, and geomagnetic storms.

Introducing Space Weather, where you can simulate intense geomagnetic storms, including the Carrington Event, by launching a powerful coronal mass ejection (CME) toward the Earth.

Introducing the new Convection Zone game, where you can interactively learn about energy transfer near the surface of the Sun

Introducing the Convection Zone, where you can learn about energy transfer near the surface of the Sun

We hear you, and we've lifted the daily play limit for all players in this update. Please enjoy your Milky Way

We’ve unlocked every simulation for you to explore. Please enjoy your Milky Way

+ Introducing Orbit Architect, where you can interactively learn orbital mechanics + Optimizing the Giant Impact simulation for previous generation devices

We hear you, and we've taken the ads out in this update. Sorry for the frustration.

Improving app stability

All simulations in Milky Way are now free. Thank you for your continued support in making the app accessible to everyone.

Adding new galaxies to the 3D Galaxy Merger simulation

Introducing Meteoroid Breakup, where you can simulate how a meteoroid splits into smaller fragments as it enters Earth’s atmosphere.

Fixing the Sun’s intrinsic brightness in the 3D Milky Way map so you can see how bright the Sun would appear in the Proxima Centauri sky and around other nearby stars.

BIG UPDATE for the 3D Galaxy Merger, Comet Tails, and Planet Rivals games

Introducing Comet Tails, a tool for simulating the length and shape of comet dust tails.

Introducing 3D Milky Way Map where you can explore 3 million stars in our galaxy.

Milky Way Map PRO is included with your subscription and lets you explore the night sky at high zoom levels.