Space & SCience
June 05 2025
By Saurabh
A day is how long a planet takes to spin around once. Earth spins in 24 hours, but on other planets, a day can be super short or really, really long!
58.6 Earth Days (The Super Slow Spinner)
Mercury spins so slowly that it takes almost 59 Earth days just to turn once! But guess what? Because of the way it moves around the Sun, if you stood on Mercury, you'd wait 176 Earth days to see the Sun rise again! That means one day is longer than one year on Mercury!
243 Earth Days (The Backward Planet)
Venus spins super slow, one spin takes 243 Earth days! And it spins the opposite way from most planets, so if you were there, the Sun would rise in the west and set in the east.
24 Hours (Just Right for Life)
Earth spins once every 24 hours, which gives us day and night. It’s the perfect pace for life, and it's the only planet we know that has people, animals, and plants!
24.6 Hours (Almost Like Home)
A day on Mars is just a little longer than Earth’s, about 25 hours. Scientists even made a special word for it: "sol"! Mars is the most Earth-like planet we’ve found so far.
9.9 Hours (The Speedy Giant)
Jupiter is the biggest planet, but it spins the fastest, less than 10 hours for a full day! Its fast spin makes it look a little squished and helps create giant storms like the Great Red Spot.
10.7 Hours (The Spinning Ring Planet)
Saturn also spins quickly, just over 10 hours per day. Its fast spin and light gases make it flat at the top and bottom. And of course... it has the coolest rings in the solar system!
17.2 Hours (The Sideways Spinner)
Uranus is a little weird, it spins on its side like a rolling ball! One day is about 17 hours, and its strange tilt makes each season last over 20 years.
16.1 Hours (The Windiest Planet)
Neptune's days are short, just 16 hours long. But its weather is wild! It has the fastest winds in the solar system, blowing faster than a rocket!