The Sciences. Newsletter Sign up for our email newsletter for the latest science news. Sign Up. Already a subscriber? Want more? More From Discover. Zemogle Zemogle. The chances of a perfectly symmetrical cloud existing in complete isolation from destabilizing forces is highly unlikely. Random space-rock passes by, gravity wave disturbs dust cloud, end result is a spinning body.
Maybe not pulsar speed but it will rotate. Assymetry cannot create global spin. But it does create local spin. See my question. Of course, external perturbation can induce spin through angular momentum exchange. Look at the clouds photographed by Hubble. They are anything but perfectly symmetrical. Asymmetry coupled with a nearby gravitating body another gas cloud, a star, It's called gravity gradient torque. Gas clouds are not spherical cows.
They are asymmetric, lumpy things. Show 1 more comment. Jeremy Jeremy 3, 1 1 gold badge 16 16 silver badges 26 26 bronze badges. Wedge Wedge 1, 12 12 silver badges 10 10 bronze badges. The angular momentum cannot be lost and is conserved as orbital momentum. I was just on the point of adding something similar myself and then read your answer. However I was thinking of close binary stars. As her arms come closer to her axis of rotation, her speed increases and her angular momentum remains the same.
Similarly, her rotation slows when she extends her arms at the conclusion of the spin. As an interstellar cloud collapses, it fragments into smaller pieces, each collapsing independently and each carrying part of the original angular momentum. The rotating clouds flatten into protostellar disks, out of which individual stars and their planets form.
By a mechanism not fully understood, but believed to be associated with the strong magnetic fields associated with a young star, most of the angular momentum is transferred into the remnant accretion disk. Planets form from material in this disk, through accretion of smaller particles. In our solar system, the giant gas planets Jupiter, Saturn, Uranus, and Neptune spin more rapidly on their axes than the inner planets do and possess most of the system's angular momentum.
The sun itself rotates slowly, only once a month. How are planets affected by the Hot Ionised Medium? Most Recent. Is speed of light the same everywhere? Beginner How does Venus have sulphuric acid in it's clouds? Intermediate Why is the sun red? Beginner But seriously: what was there before the Big Bang? Beginner How far can photons move freely in the early universe Advanced How likely is it that the Solar System has had or will have a close encounter with another star?
Intermediate How do we know what we observe is x light years away? Editor's Pick. What is the universe expanding into? Intermediate What do I need to do to become an astronomer? Beginner What's the difference between astronomy and astrology? Beginner Why is looking out into space the same as looking back in time?
Beginner Can we find the place where the Big Bang happened? Most Popular. Are there telescopes that can see the flag and lunar rover on the Moon? Beginner Can artificial gravity be created in space? Intermediate How long could life on Earth survive if the Sun stopped shining?
Beginner Do asteroids hit the Sun? Beginner What is the difference between a "star" and a "sun"? Beginner How do you measure the distance between Earth and the Sun?
0コメント