Space Facts for Kids
Out-of-this-world facts about the universe
Saturn has over 140 known moons — more than any other planet in our solar system.
Astronauts grow taller in space but shrink back to normal size after returning to Earth.
Olympus Mons on Mars is the tallest known mountain in the solar system at about 72,000 feet.
The Milky Way galaxy is zooming through space at about 1.3 million miles per hour.
A day on Jupiter lasts only about 10 hours — it's the fastest-spinning planet in our solar system.
A sugar-cube-sized piece of neutron star material would weigh about a billion tons on Earth.
Saturn's rings are mostly made of billions of chunks of ice and rock, ranging from tiny grains to house-sized boulders.
A Martian day is only about 37 minutes longer than an Earth day.
The first animals in space were fruit flies, launched by the United States in 1947.
Scientists have discovered over 5,000 planets outside our solar system, called exoplanets.