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...five planets known at the time (Mercury, Venus, Mars, Jupiter, and Saturn) orbit the Earth. ...s ([[epicycles]]) and that the centers of the epicycle move in a circular orbit (the deferent) around the Earth. With this model he was able to predict the

...of [[Venus (planet)|Venus]] and [[Earth]]. It was the first spacecraft to orbit Jupiter. In 2003, the spacecraft was deliberately sent into Jupiter's atmo

{{rpl|Near Earth Orbit}}

...coupling it is useful to diagonalize the matrix of the corresponding spin-orbit operator within the ''L-S'' basis [consisting of the (2''L''+1)×(2''S''+1) ...good quantum numbers). Then splittings after switching on first-order spin-orbit coupling (''J'' good quantum number). Finally on the right [[Zeeman]] split

*(a) is in orbit around a Sun; *(c) has cleared the neighborhood around its orbit.

...ies, while the orbit of the third pair of binary stars took 2,000 years to orbit the barycenter.<ref name=nytimes2021-01-23/><ref name=SciNews2021-01-25/><r ...ystems orbit each other roughly every day and a half, and the two binaries orbit each other about every four years. The B binary’s members circle each oth

...roughly 2.000 times that of the sun. The star is large enough to fill the orbit of Venus if it were in the sun's position.<ref name="Kaler" /> ...itself a double system with the stars an average of 0.3ˡˡ apart. The stars orbit each other every 63 years or so. Both stars are [[main sequence]] dwarfs. T

...e [[Sun]], taking 248.1 [[Earth]] years to complete one (admittedly odd) [[orbit]]. Like many other worlds in the region, it hosts [[natural satellite|moons ==Orbit and size==

...April 28]], 2003. A [[Pegasus rocket]] placed GALEX into a nearly circular orbit at an [[altitude]] of 697 [[kilometre|km]] (432 [[Mile|miles]]) and an [[in

...igned to fly in space. Normally this would apply to vehicles that reach [[orbit]], or travel beyond the Earth. However, '''spacecraft''' is also used to d ===Earth Orbit Satellites===

{{r|Reduced period of first Bohr orbit}} ℏ/Eh time 2.418 884 326 505(16) × 10−17 s

...s [[group action]] of ''G'' on itself, and the conjugacy classes are the [[orbit]]s of this action.

...issile]]s, whose trajectory goes through outer space, but does not achieve orbit. ...yer of the atmosphere and it is in this layer that our man-made satellites orbit the Earth. From this layer, atoms and molecules escape into the void of spa

...ce]], [[gas]] and dust, and has a highly eccentric, [[ellipse|elliptical]] orbit around the [[Sun]]. Comets become visible as they approach the Sun and can

DSCS satellites are in [[satellite orbits|geosynchronous orbit (GEO)]], and have six [[ITU frequency bands|Super High Frequency (SHF)]] co

...n the angle between the plane of this ellipse and the plane of the Earth's orbit. The parallax angle &alpha; is used as a measure of distance: 1<nowiki>''</

...r [[satellite orbits|orbital]] path, or into an escape velocity from Earth orbit. The term explicitly excludes [[ballistic missile]]s used as weapons, in pa

...or objects to either pick up speed as they fall vertically, or maintain an orbit rather than travel in a straight line away from the planet. However, for a * As mentioned already, a person or object in vertical freefall or in orbit around a planet has zero apparent weight. A scale under the person or objec

...Galileo did record it as a fixed star in 1612 and 1613. Aberrations in the orbit of Uranus led French mathematician and astronomer Urbain Joseph Le Verrier ...d of 20 years, the orbit of [[Pluto (dwarf planet)|Pluto]] lies within the orbit of Neptune.<ref name=NASASSENeptune/>

...inimum of 24 by satellites in full operation capability (FOC) status that orbit in six different planes. The exact number of satellites varies as satellite ...proximately 20,000 km with an inclination of 55 degrees, making a complete orbit in approx. 11 hours, 58 minutes. All Satellites are dual-frequency, in the

...ded that, to be called a planet, an object must have three traits. It must orbit the sun, be massive enough that its own gravity pulls it into a nearly roun *Has mass sufficient for gravity to clear a path in its orbit.

In his model, the Sun place is the centre of the [[orbit]]s of five [[planet]]s ([[Mercury]], [[Venus]], [[Mars]], [[Jupiter]], and

...[spaceflight]], '''satellites''' are objects which have been placed into [[orbit]] by human endeavor. They are sometimes called '''artificial satellites'''

...ould happen every month, as the Moon orbits the Earth; however, the Moon's orbit has a slight wobble so most months it is either too high or too low to be

...osetta (comet orbiter)|Rosetta]]'' spacecraft, which took up a position in orbit of comet [[67P/Churyumov–Gerasimenko]] prior to releasing the lander.

...ne.jpg|thumb|300px|right|{{TaskForce One.jpg/credit}}<br />Operation ''Sea Orbit'': On July 31, 1964 USS ''Enterprise'' (CVAN-65) (bottom), [[USS Long Beach

...launched into orbit almost a year ago. The satellite can now move from one orbit to another with the help of the engine, which discharges no reaction mass. </i></ref>. Menshikov claims that the device moves the satelite <i>from one orbit to another with the help of the engine, which discharges no reaction mass.<

...e perpetual motion machine [[Gravitsapa]] that was launched into the Earth orbit in 2008 and advertised in mass media as a great achievement of Russian scie ...launched into orbit almost a year ago. The satellite can now move from one orbit to another with the help of the engine, which discharges no reaction mass./

...19 June 1976 and trimmed to a 1513 x 33,000 km, 24.66 h site certification orbit on [[21 June]]. Landing on Mars was planned for [[July 4]], 1976, the [[Uni ...gust 1980 Viking 1 Orbiter was running low on altitude control gas and its orbit was raised from 357 × 33943 km to 320 × 56000 km to prevent impact with M

...cursion Module (LEM), which became accessible to the crew after launch and orbit; the airlock of the CM mated with that of the LEM.

...ystem (SBIRS), one in satellite orbits#geosynchronous orbit|geosynchronous orbit as is DSP <ref name=>{{citation

.... D., John Imbrie, and N. J. Shackleton (1976). "Variations in the Earth's Orbit: Pacemaker of the Ice Ages". Science 194 (4270): 1121 - 1132.</ref> This th ...etting closer to the mid-interglacial peak, as the eccentricity of Earth's orbit will be almost halved, reducing the mean orbital radius.

...to be a [[comet]]. Upon tracking it for some time, he calculated that its orbit was nearly circular and, on that basis, concluded that it was a previously ...parently by a yet more distant object. Based on these perturbations in the orbit of Uranus, the approximate location of the hypothetical planet responsible

...were {{convert | 332 | km | mi}} and {{convert | 348 | km | mi}}, and its orbit was titled 50.2 degrees to the equator.<ref name=spaceflightnow2020-09-08/> ...l = https://www.bollyinside.com/news/chinas-spacecraft-is-still-in-orbit-but-information-is-emerging-from-recovered-launch-debris

...rrect for inaccuracies by using observations from multiple points in their orbit. In a sense, this is the reverse of [[radar#synthetic aperture radar|synthe ...overall cost would, in turn, give the opportunity to have more payloads in orbit or that could quickly be orbited, increasing flexibility of deployment.

* ''Oceans to Orbit: The Story of Australia's First Man in Space, Paul Scully-Power'', 1995

...tion/wlagran.html Further detail about Lagrangian points</ref>. During its orbit the craft collected solar wind samples during specific time periods when th

|Orbit distance around the Earth||2.4134×10⁶ km |Orbit velocity around the Earth||1.0224 km/s

...proximately 20,000 km with an inclination of 55 degrees, making a complete orbit in approx. 11 hours, 58 minutes. All Satellites are dual-frequency and broa ...e orbital planes with an inclination of 64.8 degrees. They make a complete orbit in approx. 11 hours, 15.5 minutes. All satellites broadcast L1 and L2 signa

...ded that, to be called a planet, an object must have three traits. It must orbit the sun, be massive enough that its own gravity pulls it into a nearly roun *Has mass sufficient for gravity to clear a path in its orbit.

<th align="left">Orbit height</th><td>42,000 km apogee, 26,000 km perigee</td> ...align="left">Orbit period</th><td>One day ([[geosynchronous|geosynchronous orbit]])</td>

...e coating of some of the tiles. The water however did not freeze while in orbit because the water vaporized as the affected area was turned toward the sun.

...by [[SpaceX]] hopes to be the first privately funded first rocket to reach orbit

...harbour [[life]]. It is the third [[planet]] out from its [[sun]]. Earth [[orbit]]s around 93 million [[mile]]s (150 million km) from the sun, within a regi

...espected theoretical astronomer who performed some significant work on the orbit of the newly discovered (1846) planet [[Neptune]]. ...ons which resulted in a wrong orbit; Peirce because he accepted this wrong orbit as mathematically valid, and from it derived a second solution. Le Verrier

...nic relay(s), most often artificial satellites in [[satellite orbits|Earth orbit]]. The article is not titled "communications satellite", since many applica

...''pc''') is the distance at which the [[parallax]] relative to the earth's orbit of an object is equal to one [[arc second]], or alternatively, the distance

...rnational Astronomical Union]] (IAU), a '''planet''' is a celestial body [[orbit]]ing a [[star]] or [[Stellar evolution#Stellar remnants|stellar remnant]] t Bodies that [[Orbit|orbit]] the Sun and are rounded by their own gravity, but have not cleared the ne

...ted to impact the Earth. One option is to develop some scheme to alter the orbit of the NEO. As Earth moves through its own diameter every six minutes, the

...ted 375 launches and stressed that the accuracy of putting satellites into orbit and the number of launch times are all first-class in the world.