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How long is a day on Saturn ?


Posted on Tuesday, 27 March, 2007 | Comment icon 6 comments | News tip by: Pendekar Timur


Image credit: NASA
 
"Strangely, astronomers don't know how long a day is on Saturn, because they can't get a firm footing on the problem given the giant planet's gaseous nature."

  View: Full article |  Source: Yahoo! News

  Discuss: View comments (6)

   


 
Recent comments on this story
Comment icon #1 Posted by :PsYKoTiC:BeHAvIoR: on 27 March, 2007, 14:15
Only 10 hours and 46 minutes? I'm a bit surprised by that result. Although I assumed Saturn's rotation was at similar speed than Earth's, giving the lenth of the day longer than ours. How fast can a planet can rotate while keep a balance of lifeforms on its surface? If Earth rotated quicker, would our bodies notice?
Comment icon #2 Posted by Raptor X7 on 27 March, 2007, 14:35
If Earth rotated quicker, would our bodies notice? No, you'd only notice if the Earth was in the process of speeding up or slowing down. As long as it's going at a constant speed you wouldn't notice. It's the same thing as being on a train, bus, plane etc. you can walk around easily while it's going at the same speed, but as soon as it starts to accelerate you'll have a hard time standing up. Also remember that a person at the equator of the Earth is travelling a lot faster than a person at one of the Earth's poles, but neither feel a thing.
Comment icon #3 Posted by rassy on 28 March, 2007, 9:23
I disagree...if the earth spun significantly faster, our bodies would notice, although I wouldn't know if we weould consciously notice. Our bodys would feel lighter and would compensate for that, so of course they would notice.
Comment icon #4 Posted by Raptor X7 on 28 March, 2007, 10:47
I disagree...if the earth spun significantly faster, our bodies would notice, although I wouldn't know if we weould consciously notice. Our bodys would feel lighter and would compensate for that, so of course they would notice. You're right. If the Earth span faster you would be slightly lighter, although the effect is very small. For any significant change the planet would have to speed up a lot.
Comment icon #5 Posted by :PsYKoTiC:BeHAvIoR: on 28 March, 2007, 14:19
No, you'd only notice if the Earth was in the process of speeding up or slowing down. As long as it's going at a constant speed you wouldn't notice. It's the same thing as being on a train, bus, plane etc. you can walk around easily while it's going at the same speed, but as soon as it starts to accelerate you'll have a hard time standing up. Also remember that a person at the equator of the Earth is travelling a lot faster than a person at one of the Earth's poles, but neither feel a thing. Ah I see. That certainly makes sense. And as Rassy pointed out, mildly lighter on our feet, although it... [More]
Comment icon #6 Posted by Raptor X7 on 28 March, 2007, 15:35
If you really want to know, the equation for centrifugal force is: Force = Mass x Velocity2 ............Radius of Earth Mass being the weight of a person (say 60kg), velocity being the speed that they're travelling as the Earth rotates (at the equator, it's 465m/s), radius of the Earth being 6.38 million metres. Force = 60kg x (4652) = 2 Newtons .............6,380,000 If the Earth was spinning twice as fast the force would be: Force = 60kg x (9302) = 8 Newtons .............6,380,000 Enough of that mess... If the Earth span twice as fast the force would be four times greater, although this forc... [More]


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