Jupiter is a gas giant composed almost entirely of hydrogen and helium in various forms, with trace elements taking up only 1 percent of the planet's composition. Although it is small compared to the sun, Jupiter is over... More »

Jupiter was "known by the ancients," and so it does not have an official discovery date, according to NASA. There is evidence that pre-modern civilizations knew about the planet long before space exploration began. More »

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It is impossible to know who discovered Jupiter. According to the National Aeronautics and Space Administration, Jupiter, the largest planet in the solar system, was known to exist before recorded history. The naked eye ... More »

www.reference.com Science Astronomy Planets

Saturn is the sixth planet from the sun at a distance of 886 million miles and has a composition of hydrogen and helium. Saturn was first observed through a telescope by Italian astronomer Galileo Galilei. More »

As Jupiter is a gas planet, it does not have a surface. However, a region of gas that has a similar pressure to Earth's surface is considered by scientists to be Jupiter's surface. At this region, the planet's temperatur... More »

Jupiter has an atmosphere that is made up of mainly hydrogen and helium gases, with thick clouds and high winds. Jupiter's hydrogen and helium gases are the same type of gases found on the sun. More »

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It would be impossible for humans or any other life to live on Jupiter, as the planet is made up primarily of gases almost the all the way to its core. NASA speculates that it might be possible for a very secure spacecra... More »