The observable universe is about 93 billion light‑years wide.
Fact #1865
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The Sun will eventually expand into a red giant.
Fact #111 · Space
The James Webb Space Telescope observes distant galaxies in infrared light.
Fact #1630 · Space
Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
Fact #1735 · Space
Black holes can slow time so much that seconds near them equal years far away.
Fact #1790 · Space
The Moon slowly moves away from Earth by a few centimeters each year.
Fact #11 · Space
Rogue planets drift through space without orbiting a star.
Fact #1609 · Space
The Vostok 1 mission marked the first human spaceflight.
Fact #1024 · Space
The center of the Milky Way contains a supermassive black hole.
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