I read that many believe planet's start out as large rocks that create some gravity there by attracting more asteroids, then comets etc and become larger and larger until its a planet. Ok but how do the explain the rotation or spinning of the planet and the energy that a planet has ie lava etc.?
creating planets how does it work?
by Crazyguy 10 Replies latest jw friends
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konceptual99
Planets spin because the stuff that makes them up was rotating.
Lava is molten rock known as magma that has been spewed out through the Earth's crust. Stuff gets hot inside a planet due to a number of factors. Some of it is still hot from when the Earth was formed. Pressure, radioactive decay also generate heat. So we are all sitting on a sea of molten rock that every now and then pops out through a zit on the crust.
Simple enough? For a less patronising view look up look up angular momentum, formation of planets etc in Google/Youtube.
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OneEyedJoe
The swirling effect is just created by all the gas and dust coming towards the densest point in the cloud due to gravity. As it collects, the gravity gets stronger and it swirls in faster - sorta like the water draining out of a bathtub. The rotation of the planets is the left over momentum from the same effect, combined with the effect of past impacts with other massive bodies in the early solar system.
As for the process of accretion , it's actually a bit more complicated - in the early solar system there was tons of dust and gas swirling around, but no single particle has enough gravity to bind it to another. Instead static charge starts to stick the dust together to form larger pebbles. these pebbles still don't have enough gravity to pull anything in, but through chance collisions (which often have sufficient energy to melt the rocks into a molten ball, fusing the two peices together) they'll eventually get to that point and gravity starts to take over. This is a gross simplification, but if you look up some information on accretion, I'm sure you'll find some interesting reading if you want more.
As for the molten core of the earth, it's also, to a certain extent, a left-over from the early solar system. The impacts with other proto-planets left the earth sorta a molten ball, and the surface has now cooled but the core is still hot. There's also the effect of the earth's gravity applying immense pressure on the core that keeps it hot, along with tidal forces (from both the moon and sun) that create friction inside the earth's core to heat it up.
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Legacy
Hi,
God created Planets cuz when he resurrects billions & billions of people..there is no room on Earth for all he plans to bring back.
Just kidding...couldn't resist replying..
Legacy
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Gregor
Jesus gave Jehovah a huge box of Play-Doh for his 100 billionth birthday.
The rest is history
Oh, yeah. After the planets were made the Jesus gave Him a set of Chia Pet kits.
The rest is history
Oh, and then Jesus gave him a package of Sea-Monkeys.
The rest is history
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prologos
Spin can bE counter-intuitive. a eddy near the shore of a river can go against the flow. adjacent planets can spin in opposite direction, like the Earth and Venus. spins stop over time, the moon spins only at one revolution per month, our tides will slow our spin too. The solar sysystem spin seems to be a 10 hour day, without the moon that is our rate. Uranus is the real odd spinner, like a barrel tipped past the horizontal. On average the planets spin in the same direction as the solar sytem, the sun, counter clock wise.
The whole place is humming too, If you put dust on a violin, drumm, it will congregate into certain nodes. There also is electro-magnetism.
google Alma,HT Centauri, they just looked at a planetary disk developin gaps, and look at the rings of Saturn, all done with laws that came out of the big bang beginning.
Its done in stages too, all the inner bodies are rocky, except the center one, the sun, it is mostly made from the very lightest, Hydrogen and Helium, no surprise though, for there is no gravity in the center of it all.
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Simon
Look at it anothewa y - all those rocks and things smashing into each other and the whole lot circling another large mass (star).
Wouldn't it be strange if things *weren't* actually spinning? There are a myriad ways something can move but only one way for it to be perfectly still ... what would be the chances?!?!
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frankiespeakin
Well I think you can google it and find a good answer.
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WTWizard
If I hit a stationary object witn another object, and I do not hit it right on center, it will spin the once stationary object. If something was already spinning, perhaps because of the Coriolis effect, hitting that object off center will either alter the spin or cause it to tilt (or alter its tilt), or both. This happens nearly every time a dust particle or rock hits the earth--if the dust particles were swirling, it will cause the body to spin as it pulls together into a ball.
Now, what causes the planet to heat up inside? Simple friction. The same force that creates a spark when you slam two rocks together creates enough heat to melt rocks when this goes on a big enough scale.
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prologos
spin means centrigugal "forces" that are needed to counteract gravity. If the solar system disk would not spin at the right speeds (kepler's laws., ie would all fall down into the sun. no fun.
some of the "moons" of outer planets move actually backward. they are captured asteroids, not pieces broken off the planet like our moon. but they still spin.
also look at a child's top spinning. spinning gives stability, a function of inertia.
newtons law.
holds us in awe.