There are planets made of diamond.
Fact #1688
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Black holes form from collapsed massive stars.
Fact #205 · Space
Asteroids vary widely in size and composition.
Fact #1631 · Space
Black holes can slow time so much that seconds near them equal years far away.
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Time moves slower in stronger gravitational fields.
Fact #1821 · Space
In 1977, a strong narrowband radio signal known as the 'Wow! signal' was detected from space.
Fact #765 · Space
The observable universe is about 93 billion light‑years wide.
Fact #1866 · Space
The Milky Way galaxy is part of the Local Group.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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