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Uranus, seventh earth in street from the Sun and the least substantial of the solar system’s four giant, or Jovian, planets, which likewise include Jupiter, Saturn, and also Neptune. In ~ its brightest, Uranus is just visible to the unaided eye as a blue-green point of light. That is designated through the price ♅.
You may be the expert on earth’s Moon. Yet how lot do friend know about the moons of various other planets? test your understanding by corresponding the moon to its world in this quiz.
|*Time forced for the planet to go back to the same position in the sky relative to the sunlight as watched from Earth.|
|**Calculated because that the altitude in ~ which 1 bar that atmospheric pressure is exerted.|
|average distance from sunlight||2,870,658,000 kilometres (19.2 AU)|
|eccentricity that orbit||0.0472|
|inclination of orbit to ecliptic||0.77°|
|Uranian year (sidereal duration of revolution)||84.02 planet years|
|intuitive magnitude at median opposition||5.5|
|typical synodic period*||369.66 planet days|
|average orbital velocity||6.80 km/sec|
|equatorial radius**||25,559 kilometres|
|polar radius**||24,973 km|
|massive||8.681 × 1025 kg|
|mean density||1.27 g/cm3|
|escape velocity**||21.3 km/sec|
|rotation period (magnetic field)||17 hr 14 min (retrograde)|
|inclination the equator come orbit||97.8°|
|magnetic ar strength in ~ equator||0.23 gauss|
|tilt edge of magnetic axis||58.6°|
|offset of magnetic axis||0.31 of Uranus"s radius|
|number of known moons||27|
|planetary ring mechanism||13 known rings|
Image that Uranus caught by the Hubble an are Telescope, 1998. Clearly shows are four of its significant rings and 10 that its satellites.
Most that the planets revolve on an axis that is an ext or much less perpendicular to the aircraft of their respective orbits approximately the Sun. Yet Uranus’s axis lies practically parallel to its orbit plane, which way that the world spins almost on that side, its poles taking transforms pointing toward the sun as the world travels in that orbit. In addition, the axis the the planet’s magnetic ar is considerably tipped relative to the rotation axis and also offset indigenous the planet’s centre. Uranus has an ext than 2 dozen moons (natural satellites), five of i beg your pardon are relatively large, and a system of narrow rings.
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Uranus has been went to by a spacecraft just once—by the U.S. Voyager 2 probe in 1986. Before then, astronomers had known tiny about the planet, since its street from planet makes the study of its visible surface daunting even with the most an effective telescopes available. Earth-based do the efforts to measure a building as an easy as the planetary rotation period had developed widely different values, varying from 24 come 13 hours, until Voyager 2 finally created a 17.24-hour rotation period for the Uranian interior. Since Voyager’s encounter, advancements in Earth-based observational technology have added to expertise of the Uranian system.