on your Mac.
Put the hardware together. Learn what it can do. Your next flight might be a first orbit, a rendezvous, or an ambitious attempt to get home.
Your spacecraft,
down to the staging.
Choose engines, tanks, instruments, and recovery hardware. Arrange the stages, save a design, and take it to the pad.
The connections you build and the fuel you carry shape the flight ahead.
Try the workshop in the alpha ↗A launchpad
full of history.
Fly Saturn V, Atlantis, Soyuz, Falcon 9, Starship, and more. Open a researched vehicle in Assembly, inspect its hardware, and make it your own.
Meet your
Koalanaut.
Step outside the spacecraft. Take your Koalanaut across the lunar surface and out into orbit, with a new articulated suit and expressive face.
Give your space program a direction.
Take observations, complete missions, and choose which hardware to research next in Expedition Atlas.
Or open the sandbox with the full parts library available and follow an idea of your own.
Come find your
first orbit.
Start with a guided first flight, or assemble your own spacecraft. Solar Explorer is in alpha testing: expect rough edges, try things, and keep a backup of flights you care about.
Apple silicon Macs · macOS 13+
Experimental, not Apple-notarized.
Check requirements before installing.
Help me keep building Solar Explorer.
I’m developing Solar Explorer independently. If you’re enjoying the alpha, your support on Patreon helps me spend more time fixing bugs, improving the game, and adding new things to explore.
Support is optional. The alpha is free to download.
Your next great idea.
That one stubborn bug.
Send a feature request, report a problem, or share how your flight went.