How much of the solar system's mass is in the Sun?
The Sun contains about 99.8% of all the mass in our solar system.
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- Why does Uranus spin on its side?
“Uranus is tilted about 98 degrees, so it basically rolls around the Sun on its side.”
Reference: NASA
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What was the first planet discovered with a telescope?
Uranus was the first planet discovered with a telescope, by William Herschel in 1781.
Does Venus spin backward?
Venus spins backward compared with most planets, so on Venus the Sun rises in the west.