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I'm good at fiction, not at science. My question is for an English project. My question is: 1 (one) Earth hour is equal to how many hours on Jupiter?
Question Date: 2018-05-13
Answer 1:

If you were writing a story about hero’s day living on the planet Jupiter, it would be a much shorter story than her day on earth!

Your question asked specifically about hours on Jupiter, but since we measure seconds, minutes, and hours with atoms (heard of an atomic clock?) I think you were asking about how your experience with time would be different on a different planet. I hope I’m right! If not, please write back :)

On Earth, we use the planet’s rotation to count time passing. This is because humans could understand day and night before we could understand how atoms can tell time! Since the Earth isn’t like other planets (different shape, different distance to our Sun, etc.), the days on Earth are also different than other planets. Here (on Earth), one day is 24 hours long. This gives your hero 8 hours to sleep and 16 hours for her to climb mountains or swim in the ocean or trek through the forest. Since one Earth day is also one rotation of the Earth around its axis, it makes sense to say that one day on Jupiter is also one rotation around its own axis.

It so happens, that Jupiter is a huge planet! Not only that, but it spins very, very fast. While Earth is spinning at about 1,000 miles per hour (quite quickly!), Jupiter is spinning at a crazy 28,000 miles per hour!!

This means that one rotation of Jupiter takes only 9 hours and 56 minutes. Your hero needs her rest, so she will still sleep for 8 hours. Unfortunately, that leaves fewer than 2 hours for adventures. Such a shame. I think she will be more successful if she stays on Earth, where the days are longer.

Thank you for writing! Good luck with your project!


Answer 2:

Good question! An hour is just a convenient division of a day, so it makes more sense to compare the length of a day on each planet. A day is how long it takes the planet to rotate on its axis. On Earth this takes 24 Earth hours, but a day on Jupiter is about 10 Earth hours because Jupiter rotates faster (the fastest in our solar system actually). So one Earth day is equal to about 24/10 = 2.4 Jupiter days.

Best,


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