Heliocentric orbit: Difference between revisions
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A '''heliocentric orbit''' (also called '''circumsolar orbit''') is an [[orbit]] around the [[Sun]]. All [[planet]]s, [[comet]]s, and [[asteroid]]s in our [[Solar System]] are in such orbits, as are many artificial [[Space probe|probes]] and pieces of [[Space debris|debris]]. The moons of planets in the Solar System, by contrast, are not in heliocentric orbits as they orbit their respective planet. The only notable exception to this is the earth's moon. It is the only moon in the solar system whose solar orbit is faster (67,000 miles per hour)<ref>[http://www.costellospaceart.com/html/how_fast_is_the_earth_moving_.html How Fast is the Earth Moving?]</ref> than its orbit around its planet (2,287 miles per hour)<ref>[http://lro.gsfc.nasa.gov/moonfacts.html Moon Facts]</ref>, so that it can be argued to primarily be heliocentric. |
A '''heliocentric orbit''' (also called '''circumsolar orbit''') is an [[orbit]] around the [[Sun]]. All [[planet]]s, [[comet]]s, and [[asteroid]]s in our [[Solar System]] are in such orbits, as are many artificial [[Space probe|probes]] and pieces of [[Space debris|debris]]. The moons of planets in the Solar System, by contrast, are not in heliocentric orbits as they orbit their respective planet. The only notable exception to this is the earth's moon. It is the only moon in the solar system whose solar orbit is faster (67,000 miles per hour)<ref>[http://www.costellospaceart.com/html/how_fast_is_the_earth_moving_.html How Fast is the Earth Moving?]</ref> than its orbit around its planet (2,287 miles per hour)<ref>[http://lro.gsfc.nasa.gov/moonfacts.html Moon Facts]</ref>, so that it can be argued to primarily be heliocentric.{{cn}} |
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An interior heliocentric orbit is an orbit inside the orbit of the Earth, for example the orbit of [[Venus]]. An exterior heliocentric orbit is an orbit outside the orbit of the Earth, for example the orbit of [[Mars]].{{cn|date=July 2012}} |
An interior heliocentric orbit is an orbit inside the orbit of the Earth, for example the orbit of [[Venus]]. An exterior heliocentric orbit is an orbit outside the orbit of the Earth, for example the orbit of [[Mars]].{{cn|date=July 2012}} |
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Revision as of 10:05, 27 August 2012
A heliocentric orbit (also called circumsolar orbit) is an orbit around the Sun. All planets, comets, and asteroids in our Solar System are in such orbits, as are many artificial probes and pieces of debris. The moons of planets in the Solar System, by contrast, are not in heliocentric orbits as they orbit their respective planet. The only notable exception to this is the earth's moon. It is the only moon in the solar system whose solar orbit is faster (67,000 miles per hour)[1] than its orbit around its planet (2,287 miles per hour)[2], so that it can be argued to primarily be heliocentric.[citation needed]
An interior heliocentric orbit is an orbit inside the orbit of the Earth, for example the orbit of Venus. An exterior heliocentric orbit is an orbit outside the orbit of the Earth, for example the orbit of Mars.[citation needed]
While it is convenient to think of orbits around the Sun, bodies in the Solar System do not actually orbit the Sun. Instead, all bodies in the Solar System (including the Sun) actually orbit the barycenter of the Solar System. A similar phenomenon allows the detection of extrasolar planets by way of the radial velocity method.
The helio- prefix is derived from the ancient Greek word helios, meaning "sun", and also Helios, the personification of the Sun in Greek mythology.[3]
See also
- Heliocentrism
- Geocentric orbit
- List of artificial objects in heliocentric orbit
- List of orbits
- Earth's orbit
References
- ^ How Fast is the Earth Moving?
- ^ Moon Facts
- ^ "helio-". Dictionary.com Unabridged (v 1.1). Random House. 2006. Retrieved 2009-02-12.
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