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- Pioneer 11 (5118 bytes)
3: ... Saturn and then it followed an escape trajectory from the [[solar system]].
5: ...ettings were modified, based on experience gained from the settings used on Pioneer 10. Three pairs of...
7: ...n was obtained from [[celestial mechanics]] and [[occultation phenomena]].
11: ...sion ended, the spacecraft was located at 44.7 AU from the Sun at a nearly [[asymptotic latitude]] of ...
15: ...arried a [[Pioneer plaque|plaque]] with a message from [[humankind]]. If the [[outer space|space]] pro... - Venus (planet) (31010 bytes)
1: '''Venus''', the second [[planet]] from the [[Sun]], is named after the [[Roman mytholo...
3: ..., it always appears in roughly the same direction from Earth as the Sun (the greatest [[elongation]] i...
7: ...me astronomers use ''[[Cytherean]]'', which comes from [[Cythera]]. Other less common adjectives incl...
14: ...]'s, even though Venus is nearly twice as distant from the Sun and only receives 25% of the solar irra...
16: ...k into space. This prevents most of the sunlight from ever heating the surface. Venus's [[Bolometer|... - Uranus (15207 bytes)
145: ..., or "YOOR-ə-nus") is the seventh [[planet]] from the [[Sun]]. It is a [[gas giant]], the third l...
157: ... regions of Uranus receive a greater energy input from the Sun than its equatorial regions. Uranus is ...
172: ...rgium Sidus'' or "the Georgian" were still used infrequently (by the British alone) thereafter. The fi...
179: ...nditions. It can be easily found with binoculars. From Earth it has a diameter of 4". Even in large te...
206: ... they found that the star had disappeared briefly from view five times both before and after it disapp... - Neptune (planet) (18545 bytes)
4: ...color="black" | [[image:neptune.jpg|250px|Neptune from Voyager 2]]<br><small><font color="white">Click...
9: ...rrier]]<br> [[John Couch Adams]]<br> [[Johann Gottfried Galle|Johann Galle]]
136: ...orbit]], Neptune is sometimes the furthest planet from the [[Sun]]. Neptune is named after the [[Neptu...
142: Orbiting so far from the sun, Neptune receives very little heat. Its...
146: ...set at least 0.55 radii (about 13,500 kilometers) from the planet's physical center. Comparing the mag... - Pluto (planet) (26470 bytes)
120: '''Pluto''' is the ninth [[planet]] from the [[Sun]] in our [[solar system]]. Because Pl...
126: ...eone else did". Soon suggestions began to pour in from all over the world. Constance Lowell, [[Perciva...
128: ...tia Burney]], at the time an eleven-year-old girl from [[Oxford, England|Oxford]], [[England]]. Over t...
140: ...o speeds up due to the gravitational acceleration from the Sun, stays ahead of Neptune, and pulls ahea...
146: ...the case of Pluto, the star dimmed out gradually. From the rate of dimming, the atmosphere was determi... - Hubble Space Telescope (50930 bytes)
4: ...text-align:center;" | The Hubble Space Telescope, from the [[Space Shuttle Discovery]] during the seco...
8: ...avelength regime'''||optical, ultraviolet, near-infrared
45: ...h, it was found that the main [[mirror]] suffered from [[spherical aberration]], severely compromising...
54: ...be that a space-based telescope could observe [[infrared]] and [[ultraviolet]] light, which are strong...
58: ...observations of [[star]]s and [[galaxy|galaxies]] from its launch in 1968 until 1972, well beyond its ...
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