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cycles in the Earth's orbit that effect the amount of solar radiation striking the Earth at different t

...on, the first of these, Sputnik 1, launched the first human-made object to orbit the Earth, which took place on 4 October 1957.

...in the far-ultraviolet region of the electromagnetic spectrum, flown into orbit on the Space Shuttle in December 1990, and in March 1995.

...g. 2. [[Image:Orbit Earth.png|right|thumb|350px||Fig. 2. The Earth in its orbit around the Sun. The arrow on the Earth indicates the angle between the Eart

...nfrared imaging of earth atmosphere from [[satellite orbits|geosynchronous orbit]]; they carry secondary payloads in the [[COSPAS-SARSAT]] satellite constel

...ite)]]. They are in [[satellite orbits#geosynchronous orbit|geosynchronous orbit]].

...radius) is the maximum distance a satellite can be from a planet and still orbit the planet. ...force from Earth must dominate that of the Sun in order for a satellite to orbit it, which only happens if the satellite is close enough to Earth.

...on miles)—30 and 50 AU— from the Sun. Most of these trans-Neptunian bodies orbit the Sun within a thick band around the ecliptic plane of the solar system. ...belt of icy bodies orbiting the Sun beyond Neptune. There are comets that orbit through the solar system every half-dozen years or so. They last a few thou

# The [[orbit]] of a planet is [[ellipse|elliptical]], with the sun at one of the two foc ...rectly proportional to the cube of the semi-major axis of its (elliptical) orbit.

...oncerned with the design and operation of deep space missions beyond Earth orbit

...idymos' orbital location varies between Earth orbit and just outside Mars' orbit. Didymos orbits the [[Sun]] in an elliptical orbit, with a nearest and farthest distance from the sun of about 1 AU and about

...more strongly influenced by the Sun's gravitational pull than Earth's, and orbit the Sun instead.

Region of the Solar System extending from the orbit of Neptune (at 30 AU) to approximately 55 AU from the Sun, containing thous

a naturally-occurring [[satellite]] that is in [[orbit]] around a [[planet]]; ''the'' moon is the [[Earth (planet)|Earth's]] only

...des nonimaging and environmental information from [[satellite orbits|polar orbit]], for applications including weather, forest fire and volcanic alerts, veg

...ite orbits#geosynchronous|geosynchronous]] or [[satellite orbits#low earth orbit|low earth orbits]], receiving stations, and [[search and rescue]] mission c

An '''asteroid''' is any one of many rocky, metallic bodies that orbit the [[Sun]] but have no [[atmosphere]] and are too small to be classed as [ The [[Kuiper belt]], beyond the orbit of the [[Planet Neptune]], is also believed to contain tens of thousands of

...9895.</ref> Since an AU is based on the radius of a circular orbit and the orbit of the Earth is actually elliptical,<ref>an asymmetrical oval</ref> one AU ...surement unit for describing the distance between the Sun and objects that orbit it, such as planets, dwarf planets, comets, and asteroids. For objects outs

...while the other is in [[satellite orbits#geostationary orbit|geostationary orbit]]. Since the LEOSAT constellation spiral in a "ball of twine" orbit around the earth, they do provide polar coverage. Since they move in relat

The '''orbit''' of any ''x'' in ''X'' is the subset of ''X'' which can be "reached" from If ''x'' and ''y'' are in the same orbit, their stabilisers are [[conjugate]].