v1.0.0

Cosmogon 1.0.0 — "The whole universe"

A free, open-source universe sandbox: throw planets and black holes, watch stars live and die,
pull back from a city street to the cosmic web — and see what happens to the people.

Downloads

Platform	File	Notes
macOS 11+ (Apple Silicon & Intel)	Cosmogon-1.0.0-macOS.dmg	Open, drag Cosmogon to Applications.
Windows 10/11 (64-bit)	Cosmogon-1.0.0-Windows-Setup.exe	Installer with Start-menu shortcut.
Windows 10/11 (64-bit)	Cosmogon-1.0.0-Windows.exe	Portable: just run it.
Linux x86-64	Cosmogon-linux-x86_64.tar.gz	Extract and run cosmogon.

Nothing else needs to be installed. A GPU with Metal, Vulkan or DirectX 12 is required.

First launch (unsigned builds)

These builds are not signed with paid Apple/Microsoft certificates, so the operating system
warns the first time:

• macOS: right-click Cosmogon → Open → Open. If macOS says the app "is damaged",
  run xattr -dr com.apple.quarantine /Applications/Cosmogon.app in Terminal once.
  On macOS 15+, you may instead need System Settings → Privacy & Security → Open Anyway.
• Windows: SmartScreen → More info → Run anyway.

What's new

Start with the tour. Four guided tours — from Earth to the cosmic web, a black hole passing
through, the death of the Sun, Halley's Comet — show you around in a few minutes.

Throw anything. Pick Throw, choose a planet, a comet, a star or a black hole from the shelf and
drag to fling it, with the trajectory drawn live. Click without dragging for a circular orbit.
Grab moves things. Collisions shatter worlds after real disruption scaling: debris, molten
surfaces, boiling oceans, a flash and a shock ring racing over the ground. Moons that stray inside
the Roche limit become rings.

Stars live and die. Red giants swell and swallow their inner planets; dying stars leave
planetary nebulae and white dwarfs, or explode as supernovae and leave neutron stars and black
holes — whose radiation crosses the galaxy at light speed. New stars are born in nurseries like the
real Orion Nebula.

Black holes that bend light. Ray-traced lensing, the photon ring and blazing accretion disks;
pulsars sweep their beams.

The whole universe. Pull back from the Sun and the camera swings to the Galactic Centre: the
Milky Way's bar and arms, the Magellanic Clouds, Andromeda, and beyond them thousands of galaxies and
quasars along the cosmic web.

Civilizations beyond their world. Dyson swarms that harvest a star, terraformed planets,
generation ships that found new branches of a civilization around other stars.

Comets. Halley's Comet on its real orbit; every comet grows a blue ion tail pointing away from
the Sun and a curved dust tail.

A new interface. Icons, a cleaner universe tree, a timeline you can rewind (click a snapshot),
photo mode (P) for clean screenshots, and a synthesised soundtrack with impact rumbles and supernova
roars.

Full details: CHANGELOG.md and docs/PRODUCT_PLAN_1_0.md.