Skip to content

Space fact

Galileo discovered Jupiter’s four biggest moons in 1610.

The details

Io, Europa, Ganymede and Callisto are called the Galilean moons. Seeing them orbit Jupiter helped show that not everything circles Earth.

Source: Galilean moons (Wikipedia)

Next fact → Random

Think this is wrong? Tell us and we will check it.

More facts about space

Sunlight takes about 8 minutes to reach Earth.

Jupiter has around 95 known moons.

Venus comes closer to Earth than any other planet.

Europe’s JUICE mission is heading to Jupiter’s icy moons.

The Sun spins faster at its equator than near its poles.

Much of Venus’s surface may be relatively young.

All facts about space →

Tips from travellers

Know more about this? Add to it. The first good one goes right here.

Add a related fact

Think this fact is wrong?