Mars Invaders
A little arcade shooter: hold off the invaders before they reach the base. It needs a keyboard, so play it on a computer.
Play Mars InvadersThe solar system, as it is today.
Every planet in its real position, worked out from NASA's orbit data the moment you visit. The sky tracker adds the comets and asteroids worth looking for this month.
Planet events this month and next
Calculated in your browser from the planets' orbits, so this list is always current.
Welcome to mars-alien
A small corner of the web for space things built out of curiosity. Everything here runs in your browser, with no sign-ups and no tracking.