Space Learning Center
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Astronomy Basics
Planetary Science
Did You Know?
A day on Venus is longer than a year on Venus
Venus takes 243 Earth days to rotate once, but only 225 Earth days to orbit the Sun.
Neutron stars can spin 600 times per second
These ultra-dense stellar remnants can rotate incredibly fast due to conservation of angular momentum.
Space is completely silent
Sound waves need a medium to travel through. In the vacuum of space, there is nothing to carry sound.
The Sun makes up 99.86% of our solar system's mass
All the planets, moons, asteroids, and comets combined make up less than 0.2% of the total mass.
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