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Raza
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It seems like a childish question, but why does the Earth go around the sun? Why not stay in a single place?
arildno said:Of course, in the Earth's rest frame, the Earth is, indeed stationary. At all times..*
*I know, it is dumb, but I couldn't resist posting it anyway..
Averagesupernova said:The Earth is flat too. :rofl:
I'm just jerk'n your chain. As with you, neither could I resist posting.
I still don't get of why it must orbit around the sun.russ_watters said:It can't stay in a single place because of the force of gravity.
ranger said:When we drop something to Earth from a reasonable height, it falls to the Earth in a straight line. If we however were to stand and throw a ball at a certain angle, it will fall to the Earth along a curved path. If it were possible for us to throw it hard enough, the ball will follow a curved path, but would always miss the earth, hence it would be falling to the earth, but always missing. Therefore, it is in orbit around the earth.
The same principle can be applied to the earth. It is falling towards the sun, but it moves sideways fast enough i.e enough tangential velocity to always miss the sun. Like the ball in orbit around the earth, the Earth is in orbit around the sun.
arildno said:Of course, in the Earth's rest frame, the Earth is, indeed stationary. At all times..*
*I know, it is dumb, but I couldn't resist posting it anyway..
Still childish ,but more interesting question,is why does the Earth turn around itself.Perhaps crazy ,but still correct answer is :Becouse nobody wants to put and effort and stop it (fortunately).Raza said:It seems like a childish question, but why does the Earth go around the sun? Why not stay in a single place?
I was just going to ask that.tehno said:Still childish ,but more interesting question,is why does the Earth turn around itself.Perhaps crazy ,but still correct answer is :Becouse nobody wants to put and effort and stop it (fortunately).
Hehehe.
Raza said:I was just going to ask that.
Raza said:If I were to create my own solar system, duplicating everything to the last atom but except, there was no "push" given to the planets, what would happen?
russ_watters said:It would all collapse into the sun.
The Earth rotates for the same reason it revolves - it formed from a rotating cloud of gas and dust.tehno said:Still childish ,but more interesting question,is why does the Earth turn around itself.Perhaps crazy ,but still correct answer is :Becouse nobody wants to put and effort and stop it (fortunately).
Hehehe.
Huh? The Earth's motion doesn't decrease the gravitational force. The Earth is accelerating toward the sun at exactly the same rate as if it were not in orbit. It's just that since it has a component of motion perpendicular to the sun, that acceleration just pulls the Earth around in a circle (instead of letting it fly off at a tangent).Raza said:I know I am going too in-depth in this, but how does the Earth going around decreases the gravity force in such a way that makes the Earth not move closer to the sun and not go further away from the sun?
Raza said:It seems like a childish question, but why does the Earth go around the sun? Why not stay in a single place?
Those other things would also require the stars to be orbiting the earth...heusdens said:This may seem like a childish reply, but how do you conclude it revolves around the sun?
We only see the sun coming up in the east and go down in the west, and they may mean the sun revolves around the earth, or the Earth evoles around it's own axis.
heusdens said:This may seem like a childish reply, but how do you conclude it revolves around the sun?
We only see the sun coming up in the east and go down in the west, and they may mean the sun revolves around the earth, or the Earth evoles around it's own axis.
Jarle said:What I'd like to know is if the Earth ever will bash into the sun. Or will it's orbit continue forever, taking out that the sun will collapse someday.
tehno said:Apparently, Moon slowly drifts away from Earth on average.At least, I've heard/read so.Big Oceans effect?Apparently.
Jarle said:I have heard that in space there is not entirely vacuum, so after extremely long time, these atoms would stop the Earth enough to make it go swoop into the sun? Or would it's kinetical energy be empty someday so it would fall into the sun.
Well, it's true that it won't cause us to go on a collision course with the sun, but it's NOT because it's burning up in the atmo. Whether it burns up or not, it still contributes the same mass - and causes the same amount of friction.Ki Man said:its possible, but the particles are so small that it would have very little effect, although the Earth does colelct quite a few tons of dust every day out of space. most of the stuff floating in space would just burn up into the atmosphere and come down as dust, and i don't think a few specs of dust will send us on a collision course with the sun any time soon
DaveC426913 said:It is stealing energy from the Earth's rotation. The Moon is pulling on the imperfections in the Earth's sphere, slowing it down in the same way you stop a slowing fan with your hand.
In turn, the Moon is given the extra energy, which boosts it into a higher orbit. I believe this process will stop once the Earth has been slowed to a one-face like the Moon is now. Then the Moon will begin spiralling in again.