How long does it take Oort Cloud to orbit the sun(in earth years)?

Question

Please help me!!

Answer 1

According to Wiki, the Oort cloud is between 50,000 and 100,000 times the distance from the earth and the sun (1 au). And, according to Kepler's third law, orbital periods vary as the square root of the cube of the orbital radius (p^2 = r^3). So the orbital periods should range from 11.18 million years to 31.6 million years.

(50,000^3)^.5 = 11.18 million
(100,000^3)^.5 = 31.6 million
years, because the orbital period of the earth is 1 year, and it's the unit of measurment in this case.

Answer 2

The orbital time depends on the distance from the sun and the Oort Cloud extends from 50,000 au (1 au = distance from sun to earth) up to approximately 2 light years. So their orbit times differ dramtically from 200 years to millions of years.

Answer 3

It doesn't orbit the way I suspect you are thinking. It is not like a puffy cloud you would see in the sky that moves around the Sun. It is the collection of billions of comets, all in different orbits that spend most of their time far from the Sun. I mean REALLY far, like a light year away. And it completely surrounds the solar system. It is more like a thick shell completely enclosing the solar system. And it is not really a cloud so much as it is a swarm. So each comet has a different orbit, all crisscrossing each other like a ball of string. And each comet probably takes millions of years to complete one orbit.

Jan Oort noticed that comets are seen to approach the Sun from all directions, and plotting their orbits shows that they come from very far away but not from another star. So he supposed that there were billions of them lurking out there, right and left and above and below and in front of and behind the Sun; in every direction, but loosely associated with the Sun and not just interlopers from interstellar space. And sometimes one comes in close to the Sun, but most are lurking out there were we can't see them.

Answer 4

No one knows, it has never been seen. A few members have been seen like Sedna. Sedna's orbit takes about 12000 years. Quaoar is another one, its orbit is only 285 Earth years. But the entire Oort Cloud does not revolve at the same pace, so there is no answer to your question.