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- Johannes Kepler (17038 bytes)
35: ...hich were nested inside each other. The smallest orbit, that of Mercury, was the innermost sphere. He t...
42: ...ds of the first group must lie beyond the earth's orbit, and those of the second group within… Thu...
44: ...bedded within them, and thus defined the planet's orbit.
52: ... his disappointment, Kepler's attempts to fix the orbits of the planets within a set of polyhedrons never...
54: ...quence of his failed attempt to fit the planetary orbits within polyhedra. Kepler's willingness to abando... - Timeline of United States history (1990-present) (6005 bytes)
4: ...[[1990]] - [[Hubble Space Telescope]] placed in [[orbit]] - Season (10047 bytes)
18: ... exposure alternates as the Earth revolves in its orbit. At any given time, regardless of season, the [[... - Venus (planet) (31010 bytes)
1: ...t to [[circle|circular]], with an [[eccentricity (orbit)|eccentricity]] of less than 1%.
23: ...ation, the periods of Venus's rotation and of its orbit are synchronized in such a way that it always pre...
40: ...at of [[Mercury (planet)|Mercury]] because Venus' orbit is far less eccentric than Mercury's.
42: ...s Ponticus]] proposed that both Venus and Mercury orbited the Sun rather than Earth.
46: Because its [[planetary orbit|orbit]] takes it between the Earth and the Sun, Venus a... - Mars (27704 bytes)
11: ...confirmed in [[March 2004]] by the [[Mars Express Orbiter]], present measurements state a average methane...
47: ...age:Phobos Deimos orbit Mars.jpg|thumb|left|250px|Orbits of Phobos and Deimos (to scale)]]
49: ...s, on the other hand, is far enough away that its orbit is being slowly boosted instead.
59: ! Mean orbital<br>radius (km)
60: ! Orbital period - Jupiter (24639 bytes)
6: ! bgcolor="#c0ffff" colspan="2" | [[Orbit]]al characteristics ([[Epoch (astronomy)|Epoch]] ...
11: ! align="left" | Orbital [[circumference]]
14: ! align="left" | [[Eccentricity (orbit)|Eccentricity]]
23: ! align="left" | [[Orbital period]]
29: ! align="left" | [[Avg. Orbital Speed]] - Saturn (planet) (23300 bytes)
6: ! bgcolor="#c0ffff" colspan="2" | [[Orbit]]al characteristics ([[Epoch (astronomy)|Epoch]] ...
11: ! align="left" | Orbital [[circumference]]
14: ! align="left" | [[Eccentricity (orbit)|Eccentricity]]
23: ! align="left" | [[Orbital period]]
29: ! align="left" | [[Avg. Orbital Speed]] - Uranus (15207 bytes)
15: !bgcolor="#c0ffff" colspan="2"| [[Orbit]]al characteristics ([[Epoch (astronomy)|Epoch]] ...
20: !align="left"| Orbital [[circumference]]
23: !align="left"| [[Eccentricity (orbit)|Eccentricity]]
32: !align="left"| [[Orbital period]]
38: !align="left"| [[Orbital speed]] - Neptune (planet) (18545 bytes)
14: ! bgcolor="#c0ffff" colspan="2" | [[Orbit]]al characteristics ([[Epoch (astronomy)|Epoch]] ...
19: ! align="left" | Orbital [[circumference]]
22: ! align="left" | [[Eccentricity (orbit)|Eccentricity]]
31: ! align="left" | [[Orbital period]]
37: ! align="left" | [[Avg. Orbital Speed]] - Pluto (planet) (26470 bytes)
15: !bgcolor="#a0ffa0" colspan="2"| [[Orbit]]al characteristics ([[Epoch (astronomy)|Epoch]] ...
20: !align="left"| Orbital [[circumference]]
23: !align="left"| [[Eccentricity (orbit)|Eccentricity]]
32: !align="left"| [[Orbital period]]
38: !align="left"| [[Avg. Orbital Speed]] - Sundial (16148 bytes)
26: ...d its axis is tilted relative to the plane of its orbit. A quality sundial will include a permanently-mo...
130: ...nsates for the slight eccentricity in the Earth's orbit that causes a 15 minute variation from mean solar...
137: ...ends on the hour, and the position in the Earth's orbit). Now draw the point B' in the ground just below ... - Pope Hilarius (5932 bytes)
12: ...ania]], which tended to operate outside the papal orbit in the 5th century. Silvanus, Bishop of Calahorr... - Charles de Gaulle (41586 bytes)
124: ... In 1965 France launched its first satellite into orbit, being the third country in the world to build a ... - Nicolaus Copernicus (26283 bytes)
51: ...h's axis is not perpendicular to the plane of its orbit. He added another motion to the Earth, by which t...
53: ...s in the solar system, which runs on elliptical [[orbit]]s; and this model was no more precise in predict...
59: #Orbits and celestial spheres do not have a unique, comm...
60: ...y the center of the Earth's mass and of the lunar orbit.
61: #All the planets move along orbits whose center is the Sun, therefore the Sun is th... - Hubble Space Telescope (50930 bytes)
10: |'''Orbit height'''||600 km
12: |'''Orbit period'''||97 min
16: |'''Deorbit date'''||circa 2010
58: ...am, and 1966 saw [[NASA]]'s launch of the first [[Orbiting Astronomical Observatory]] (OAO) mission. OAO...
60: ...p;m in diameter, known provisionally as the Large Orbiting Telescope or Large Space Telescope, with a lau... - Ice age (15810 bytes)
31: ...l) forcing; and some recent considerations of the orbital forcing have even argued that in the absence of...
35: ...s [[Milankovitch cycles]] (and possibly the Sun's orbit around the [[galaxy]]), and the arrangement of th...
39: ...ge. The complex pattern of changes in [[Earth]]'s orbit and the change of [[albedo]] may influence the oc...
41: ...r. Some workers believe that the strength of the orbital forcing appears to be too small to trigger glac...
43: ...Earth's [[eccentricity (orbit)|eccentricity]] and orbital [[inclination]], and yet is by far the weakest ... - Geyser (14881 bytes)
82: ...rates [[tidal force]]s which are causing Triton's orbit to decay, so that in a few million years time it ... - Day (6866 bytes)
4: ...s, as well as the revolution of the Earth in an [[orbit]] around the Sun.
12: ...s the variation over a year as the Earth runs its orbit around the Sun. - Climate change (15859 bytes)
11: ...100,000 year [[ice age]] cycles are controlled by orbital forcing - variations in the seasonal and geogra...
18: ...re periodic, with the same periodicity as various orbital variations. These are thus non-chaotic. However...
34: ...s. The forcing for these cycles is believed to be orbital variation but the imposed forcing appears to be...
42: ...l timescales because of cyclic changes in Earth's orbit (see [[Milankovitch cycles]]). On much longer (hu... - Global warming (53726 bytes)
48: ...on-human causes, including changes in the Earth's orbit around the Sun ([[Milankovitch cycles]]), [[solar...
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