EVERYTHING rotates. The Sun, the planets, all the asteroids, they are all spinning around the galaxy and spinning around themselves.
The most likely reason WHY everything spins is that the original planetary nebula was itself spinning, and conserved angular momentum as it contracted. When the matter fell into the gravitational well of the mass that would eventually become the Sun, each atom had its own original velocity, and as the atoms collided on the way in, it all averaged out to be a rotation. Everything in our solar system spins counter-clockwise when viewed from a point high above the "north" pole; all the planets orbit that way, and most of the objects SPIN that way.
No, The earth and moon revolve around their common center of gravity, called the barycenter. The earth is so much more massive than the moon that the barycenter is within the body of the earth. It is constantly moving of course, because of the combined effects of earth's spin and the moon's orbit.
Not quite. Actually, the earth and moon both orbit the same point once every 27.32 days.
The point is their common center of mass ... the point between the earth and moon
where the pivot would have to be in order for them to balance if they were on a see-saw.
Since the earth has about 80 times more mass than the moon has, the pivot has to be
80 times farther from the moon than it is from the earth. It just so happens that the
point winds up inside the earth, but that's not a problem. It just looks like the moon
is orbiting the earth, but actually they both orbit that point.
It doesn't. From the point of view of the Earth or someone on it, the moon orbits
in an elliptical path. The reason is: Because that's the way gravity works.
Take Newton's simple equation for the gravitational force and direction, and if you
have enough algebra, geometry, and calculus to be able to massage the equation
for a while, you can show that every closed gravitational orbit is an ellipse. In fact,
you can derive all three of Kepler's 'laws' mathematically ... the first of which is that
the orbits of the planets are ellipses with the sun at one focus.
There are many questions in physics and astronomy in which the question "Why?" does not make much sense. We observe facts; we hypothesize about patterns. We don't always know "why" things are the way they are.
This is one of them. The Moon does orbit the Earth 12 and a fraction times per year. That's a fact. We have no idea if there is some sort of reason why this is true; but it IS true.
Because the earth spins all the way around, once a day.
Because there are only 2_ something days in February and then February has 1 but March has 2.
It is being pulled by another objects gravitational pull.
It takes the Earth 24 hours to make one complete rotation on it's axis, so a day lasts 24 hours.
The center-directed force of Earth's gravity pulls the moon into a nearly circular orbit around Earth. :)
Venus takes approximately 243 Earth days to rotate just once!
YES
This is because of the motion of the Earth, remembering that the Earth orbits around the Sun - so basically the "background" of stars behind the sun changes as the Earth's angle to the Sun goes a full circle. Meanwhile the Sun remains relatively still.
it has an orbit period of 560 years.
Mercury. Its takes around 58.65 days to rotate once on its axis relative to background stars.
The rotational period of the celestial sphere is simply the reflection of Earth's rotation; therefore, it rotates once every 23 hours and 56 minutes. You can determine that by observing the apparent movement of distant stars.
example , earth was once basically a liquid thus defualting to sphere shape under neutral conditions before surface hardened to finalize shape
The ocean and the earth do rotate. At the same speed, once every 24 hrs.
commets
hii
once its the other team's turn then you wait until it is your team's and that's when you rotate
Venus takes approximately 243 Earth days to rotate just once!
about once
24 hours
Since the Sun is gas, different portions rotate at different rates. The gasses at the equator rotate once in about 25.6 days. At 60-degrees latitude, the gasses rotate in about 30.9 days. Polar regions rotate about once every 36 days. http://www.enchantedlearning.com/subjects/astronomy/sun/rotation.shtml
No, it take Mercury 58 days 15 hours to rotate once.
0.345, it takes the sun 27 days to rotate on its axis once.