Report for Planet Uranus

Topics: Uranus, Planet, Saturn Pages: 2 (335 words) Published: July 19, 2011
URANUS

I. Name: URANUS
• Ancient Greek deity of the Heavens, the earliest supreme god; • Son and mate of Gaia;
• The father of Cronus (Saturn);
• Grandfather of Zeus (Jupiter);
• The only planet whose name is derived from a figure from Greek mythology rather than Roman mythology:

II. Characteristics
• Dim;
• Slow orbit;
• Atmosphere contains more "ices" such as water, ammonia and methane, along with traces of hydrocarbons; • Coldest planetary atmosphere in Solar System;
• Axis of rotation is tilted sideways;
•  Uranus's rings can sometimes appear to circle the planet like an archery target and its moons revolve around it like the hands of a clock; • Only planet that discovered with the use of mathematical equations; • Only planet that discovered in modern times;

• One of the gas planets;
• It had actually been seen many times before but ignored as simply another star; • initially reported it as a "comet"(on April 26, 1781); • Revolves around the Sun about 84 Earth years;

• 97.77 degrees axis tilt;
• No well-defined solid surface within Uranus's interior; • Have 13 distinct and complicated planetary rings.

III. Discoverers
• William Herschel- announced its discovery on March 13, 1781, expanding the known boundaries of the Solar System for the first time in modern history.  • Astronomer Jérôme Lalande- proposed the planet be named Herschel in honour of its discoverer. • The earliest recorded sighting was in 1690 when John Flamsteed observed the planet at least six times, cataloging it as 34 Tauri; • He French astronomer Pierre Lemonnier observed Uranus at least twelve times between 1750 and 1769,including on four consecutive nights.

IV. Natural Satellites
• Has 28 known natural satellites;
•...
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