In 1977, a mysterious signal known as the 'Wow! signal' was detected from space.
Fact #638
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More Space Facts
Some stars appear to dim irregularly for reasons that are still studied.
Fact #1599 · Space
The light you see from some stars today began traveling before humans existed.
Fact #1827 · Space
Comets can develop long tails when near the Sun.
Fact #281 · Space
Black holes can bend time.
Fact #1695 · Space
Some stars explode when they die.
Fact #1717 · Space
The observable universe is about 93 billion light‑years wide.
Fact #1865 · Space
Black holes can slow time so much that seconds near them equal years far away.
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Solar eclipses occur when the Moon blocks the Sun from Earth's view.
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