Space & Astronomy

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

Black Holes

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

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Mars

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

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The Moon

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

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The Visible Universe

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

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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.

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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.

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