A day on Mars is slightly longer than a day on Earth.
Fact #125
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In 1977, a strong narrowband radio signal known as the 'Wow! signal' was detected from space.
Fact #765 · Space
The Moon was likely formed after a massive collision with early Earth.
Fact #209 · Space
The light you see from some stars today began traveling before humans existed.
Fact #1761 · Space
The Earth's atmosphere protects life by filtering harmful radiation.
Fact #214 · Space
Black holes can slow time so much that seconds near them equal years far away.
Fact #1929 · Space
The heliosphere protects the solar system from interstellar radiation.
Fact #1626 · Space
Mercury has no substantial atmosphere to trap heat.
Fact #249 · Space
The Earth's magnetic north pole moves over time.
Fact #311 · Space
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