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55 Cancri b (abbreviated 55 Cnc b), occasionally designated 55 Cancri Ab (to distinguish it from the star 55 Cancri B), also named Galileo, is an exoplanet orbiting the Sun-like star 55 Cancri A every 14.65 days. It is the second planet in order of distance from its star, and is an example of a hot Jupiter, or possibly rather "warm Jupiter". [4]
The camera system was designed to obtain images of Jupiter's satellites at resolutions 20 to 1,000 times better than Voyager 's best, because Galileo flew closer to the planet and its inner moons, and because the more modern CCD sensor in Galileo 's camera was more sensitive and had a broader color detection band than the vidicons of Voyager. [2]
As minor planet discoveries are confirmed, they are given a permanent number by the IAU's Minor Planet Center (MPC), and the discoverers can then submit names for them, following the IAU's naming conventions. The list below concerns those minor planets in the specified number-range that have received names, and explains the meanings of those names.
The moon provided a gravity-assist necessary for Galileo ' s ultimate collision course with Jupiter. A safing event 28 minutes before closest approach prevented most of the planned data from being collected. Galileo ' s cameras were deactivated, after they had sustained irreparable radiation damage. Amalthea 34 160 (99) 4 November 2002
Model of a Galileo satellite. This is a list of past and present satellites of the Galileo navigation system.The fully operational constellation will nominally consist of 30 satellites in Medium Earth Orbit, with 24 active and 6 spares equally divided into 3 orbital planes in a Walker 24/3/1 configuration.
This allowed Galileo to observe in either December 1609 or January 1610 what came to be known as the Galilean moons. [6] [7] On 7 January 1610, Galileo wrote a letter containing the first mention of Jupiter's moons. At the time, he saw only three of them, and he believed them to be fixed stars near Jupiter.
Galileo was an American robotic space program that studied the planet Jupiter and its moons, as well as several other Solar System bodies. Named after the Italian astronomer Galileo Galilei , the Galileo spacecraft consisted of an orbiter and an atmospheric entry probe.
Triton is large enough to have achieved hydrostatic equilibrium, but, uniquely for a large moon, has a retrograde orbit, suggesting it was a dwarf planet that was captured. Neptune also has seven known inner regular satellites, and eight outer irregular satellites. Pluto, a dwarf planet, has five moons.