Science & Tech
orbit
astronomy
Category:
Science & Tech
- Related Topics:
- hyperbolic orbit
- elliptical orbit
- osculating orbit
- circular orbit
- orbital element
- On the Web:
- National Geographic - Orbit (Mar. 19, 2024)
orbit, in astronomy, path of a body revolving around an attracting centre of mass, as a planet around the Sun or a satellite around a planet. In the 17th century, Johannes Kepler and Isaac Newton discovered the basic physical laws governing orbits; in the 20th century, Albert Einstein’s general theory of relativity supplied a more exact description. The orbit of a planet is, if unaffected by the attraction of another planet, elliptical; some elliptical orbits are very nearly circles, while others are much elongated. Some bodies may follow parabolic or hyperbolic paths (open-ended curves). The orbit of a body approaching ...(100 of 577 words)