... eight times less than Earth's density because the planet consists mostly of gas hydrogen. The Giant or Gas planets do not have the same layered structure that the terrestrial planets do, they have less solid material. Saturn consist of around 75% hydrogen and 25% helium, like the planet Jupiter but ... but smaller than that of Jupiter's, and it is five times as weak predicted by theory. The axis of this magnetic field is aligned parallel to the planet's rotation axis, contrary to the circumstances in both Jupiter and Earth. The boundary of the magnetic field varies due to changes ... an...

• Word Count: 3775
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• Has Bibliography
• Grade Level: High School

... ancient upper highlands and are believed to be between 3.5 and 4.0 billion years old. The permanent polar ice caps are composed of water ice and solid carbon dioxide. They have a layered structure of ice and dark dust. Scientists believe that the southern polar ice caps are significantly growing (Onion). Each summer the polar regions lose about 1/3 of its ice caps and the ... interior temperature of Saturn is very hot, and is about 12,000K at the core (Arnett). Uranus The seventh planet from the Sun is unique because its axis is practically parallel to the plane of its ecliptic orbit, w...

• Word Count: 4020
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• Grade Level: High School

... scratch." The HST Second Decade study is driven by NASA's recent decision to extend the HST mission until 2010 with low-cost operations. This means that HST will operate in parallel with its successor, the Next Generation Space Telescope (NGST), planned for launch in 2007. Along with new ideas and developments comes new decisions, so vital developments and ideas can affect ... our knowledge of the size and age of the universe, provided vital evidence of the existence of super massive black holes at the centers of galaxies, detected objects with coherent structure close to the time of th...

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... solar system. Parabolas are the orbital paths of objects in the form of an open curve. If one cuts out an angle in a circular cone, it would follow this path parallel to the sides of the cone. Hyperbolas occur when a plane cuts across two parallels half-cones. Kepler's laws applies to any situation where two bodies in the universe orbit each ... atom such as hydrogen seen at visible wavelengths are called Balmer Lines. The Bohr model was named after Niels Bohr, who was a Danish physicist Bohr's goal was to explain the structure of the hydrogen atom, which previously could not be explain...

• Word Count: 3183
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• Grade Level: High School

... the present theories of how planetary rings form and remain stable. The thin outer F-ring, discovered by Pioneer 11, was resolved into three distinct but intertwined ringlets. This braided ring structure is very difficult to explain; it seems likely that both electrical and gravitational forces are at work. This voyage also helped to discovered that two of Saturn's small moons, one ... around Saturn, larger than the Earth's, but smaller than that of Jupiter. It is five times as weak as predicted by theory. The axis of this magnetic field is aligned parallel to the planet's rotation axis...

• Word Count: 3072
• Approx Pages: 12
• Has Bibliography
• Grade Level: High School