Uranus By: Jeff, Mason, and Ally
Pronunciation NO: yer-anus YES: yu̇r-ə-nəs (yerinis)
Basic Information • Uranus is the 7th planet from the sun • The name “Uranus” came from a Greek god; the god of the sky. • Uranus was discovered in 1781 by William Herschel. • It is the third largest planet in diameter measuring 31,763mi • It’s composition is icy materials (water, methane, and ammonia) • The atmosphere is mostly hydrogen and helium and a smaller amount of methane • There are four cloud layers that cover Uranus • The methane in the top layer absorbs the red sunlight and makes Uranus look blue/gray
More Information • Humans would not be able to survive on Uranus because of the atmosphere containing no oxygen. • There are 27 known moons that orbit Uranus. • 13 inner moons • 5 major moons • 9 irregular moons • One of the larger moons name is Miranda!
Moons Miranda- Smallest of the five major moons. Giant fault canyons 12 times deeper than the grand canyon. Miranda could fit in Arizona. Ariel- Possibly the youngest crust of the major moons. Many small craters cover the surface. Umbriel- Ancient, cratered surface. Very dark, reflecting only 16% of light that strikes it. Titania- Largest of all moons. Geologically active. Oberon- Half rock/Half ice. At least one large mountain rising about 20,000ft above the surface.
Temperature & Composition • Temperature- It’s the coldest planet, even though it’s not farthest away from the sun, because its made up of ice. • A typical surface temperature on the planet Uranus is • -357° Fahrenheit The Composition of Uranus: -Atmosphere of hydrogen, helium, and methane -The mantle is made up of water, methane, and ammonia - A solid, rocky core
Facts • Neptune and Uranus are commonly referred to as ice giants, in comparison with Jupiter and Saturn being known as gas giants. • The ice in the mantle is not ice in the conventional sense, but a dense fluid consisting of water and ammonia. • A day on Uranus is 27 earth hours long. • A year is 84 earth years long. • Uranus has no solid surface.
More Facts • Its equator is at a right angle to its orbit. • This means that it rotates on its side. • Scientists believe this happened because an earth-sized object collided with it long ago. • Despite its large size, the gravity on Uranus is about 91% of Earth’s gravity. • Its magnetic field is slightly weaker than Earth’s.
Fun Features • Uranus was the first planet to be discovered in “modern” times. • It takes Uranus 84 years to orbit the sun completely. • In 1690, Uranus was recorded as a star instead of a planet. • The planet is approximately 1.6billion miles from Earth • Uranus is over 4 times larger than Earth in diameter. • The best time to see the planet is at night. • There are rings around Uranus but they are very faint and dark so it’s hard to see them. • There are 13 known rings around Uranus
The rings are entirely made up of dust particles Picture of the dust particles in the rings.
Voyager II • A space probe to explore the outer planets • Purposes • Find out the structure, composition, and atmosphere of the outer planets. • Tell about the satellites (moons) orbiting the planet. • Show the size of the planet and if there are any rings • Determine the magnetic field (if any) of the planet • Original mission was to explore Saturn and Jupiter, but went on to explore Neptune and Uranus because of the alignment of the planets. • Voyager 2 is currently exploring space past Pluto • In the “Heliosheath” which is the outer most layer of our solar system
References Nine Planets. (2011, November 14). Uranus facts, pictures and information. Retrieved from: http://nineplanets.org/uranus.html Wikipedia - the free encyclopedia. Uranus. Retrieved from: http://en.wikipedia.org/wiki/Uranus Cain, F. (2008, September 30). Atmosphere of Uranus. Retrieved from: http://www.universetoday.com/18859/atmosphere-of-uranus/ Discovering Uranus. (2000). Retrieved from: http://library.thinkquest.org/C002416/uranus/discovering "General Features of Uranus." 24 Apr. 2012. Retrieved from: <http://csep10.phys.utk.edu/astr161/lect/uranus/features.html>.
References McGraw, Hill. Science Voyages. New York, New York: Glencoe, 2000. 816 Cool cosmos. (n.d.). Retrieved from: http://coolcosmos.ipac.caltech.edu/cosmic_kids/AskKids/uranus_orbit.shtml "Windows to the Universe." Windows to the Universe. Web. 24 Apr. 2012. <http://www.windows2universe.org/uranus/interior/U_int_compo_overview.html>.
Pictures: http://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Uranus2.jpg/240px-Uranus2.jpg http://upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Uranus_moons.jpg/800px-Uranus_moons.jpg http://www.news.wisc.edu/story_images/0000/0863/uranus_comp-sm.jpg http://nssdc.gsfc.nasa.gov/image/planetary/uranus/uranus_true_and_false.jpg http://voyager.jpl.nasa.gov/mission/images/missionImage_top.jpg http://explanet.info/images/Ch11/11_03.jpg