query: Where do planets get energy to revolve around sun?
positive_passages.docid: 3617
positive_passages.text: Why doesn't the Moon fall onto the Earth?
negative_passages.docid: 89194
negative_passages.text: Potential at Center of Earth
negative_passages.docid: 40405
negative_passages.text: Why do all the planets of the solar system orbit in roughly the same 2D plane?
negative_passages.docid: 33629
negative_passages.text: Why does the Sun's (or other stars') nuclear reaction not use up all its "fuel" immediately?
negative_passages.docid: 17619
negative_passages.text: How does rest mass become energy?
negative_passages.docid: 95788
negative_passages.text: Tidal force of Sun?
negative_passages.docid: 363
negative_passages.text: What is the Earth truly rotating about/revolving around?
negative_passages.docid: 110067
negative_passages.text: Are planets actually moving in elliptical orbits around the Sun or do they move in circular orbits around their center of mass?
negative_passages.docid: 143720
negative_passages.text: Why is there a temperature gradient on Earth?
negative_passages.docid: 67497
negative_passages.text: How can it be that the sun emits more than a black body?
negative_passages.docid: 5891
negative_passages.text: Where does gravitational waves' energy go?
negative_passages.docid: 107695
negative_passages.text: From where do the permanent magnets get energy from?
negative_passages.docid: 3549
negative_passages.text: Why does Venus spin in the opposite direction?
negative_passages.docid: 38265
negative_passages.text: Why don't planets have Circular orbits?
negative_passages.docid: 117087
negative_passages.text: How gravity can give energy for unlimited time?
negative_passages.docid: 100430
negative_passages.text: How does electron move around nucleus?
negative_passages.docid: 34831
negative_passages.text: Are orbiting planets an  example of perpetual motion?