Space & Astronomy Trivia

Black holes, distant planets, and the vast mysteries of the cosmos.

Black Holes

Where gravity is so strong that not even light can escape.

Play

Mars

The Red Planet has the tallest mountain and deepest canyon in the solar system.

Play

The Moon

Footprints there will last 100 million years, because there's no wind to blow them away.

Play

The Visible Universe

93 billion light-years across, two trillion galaxies, and expanding faster than light.

Play

The Milky Way Galaxy

Our home galaxy: 100,000 light-years across, hundreds of billions of stars, and a supermassive black hole at its heart.

Play

Stars

Born in nebulae, fusing 1.3 trillion pounds (600 billion kg) of hydrogen per second, dying as white dwarfs, neutron stars, or black holes. The engines of the universe.

Play

The Sun

A G2V yellow dwarf 93 million miles away, fusing 600 million tons of hydrogen every second. Our local star, and the source of nearly all of Earth's energy.

Play

More in Science & Discovery