-Stretches approximately 100,000 light years in diameter. -Spiral Formation Galaxy. -Super-massive black hole in center of galaxy known as Sagittarius A*. -Our solar system is located approximately 26,000 light years from Sgt A*.-In the time it takes you to finish this sentence, you will have beencarried along by the sun and the earth through 750 miles of actual rawspace.
-Period of revolution aroundgalaxy: 220 million years.-Equatorial rotation period: 25days.-Our Sun (also known as Sol) hassunspot regions on it’s visiblelayer during a 11 year cycle whichhelps us determine the Sun’s solarcycle and rotation period.-The hottest layer of theSun, known as thecorona, typically reachestemperatures in the range of 1million Kelvin. That’s 1,799,540° F!Recommendations: SPF 1 million.
-Closest to the Sun. -Period of revolution: 88 days. -Large iron core. -Temperature: 700 Kelvin by day/ 100 Kelvin by night. -Before 2008, scientists had observed only 40% of the Mercury has been thought to have planets surface.collided with a massive asteroid bigenough to leave a hilly terrain on theopposite side of the impact. Unknown terrain
-Known as the “Morning Star”.-Period of revolution: 225 days.-Temperature: 750 Kelvin.-Venus is covered with gentlyrolling hills, two continents, andnumerous volcanoes.-Venus is hotter than Mercurybecause it is covered with hugesulfur clouds that cause an out ofcontrol greenhouse effect on it’s -Scientists suggest that Venus was hit bysurface. an asteroid roughly the size of the planet which caused Venus to slowly rotate-On Venus it rains sulfuric acid!! clockwise rather than counter-clockwise like the rest of our solar system.
-Period of revolution: 365 days. -Only known planet to inhabit life. -Tilted 24° from it’s axis. -Water covers 71% of earth’s surface.-Sidereal period of revolution: 27 days.-First landing on moon: July 20th 1969.-Our moon is in synchronous rotation whichcauses us to see only one side of the moon.
-Period of rotation: 687 days.- 95% of atmosphere is composedof carbon-dioxide.-Has the largest known volcanocalled Olympus Mons. 3x the sizeof Mt. Everest.-Surface features indicate thatwater once flowed on Mars. Valles Marineris: Enormous canyon that stretches the length of the U.S. Phobos and Deimos: Planetesimals captured by the gravitational pull of Mars.
MarsJupiter-Between the orbits of Mars and Jupiter are -Asteroids are composed primarilybelieved to be millions of such bodies, called of metal and rock. The largestasteroids which form a giant ring called the asteroid, Ceres, has a diameter ofasteroid belt. about 900km.
-Io: Snows sulfuric acid onsurface.-Europa: Icy surface whichsuggests water inside themoon. Great Red Spot!!-Ganymede: The largest -Period of rotation: 12 years.moon in the solar system. -Jupiter’s clouds are in perpetual motion and are confined to narrow bands of-Callisto: Appears to be rising and falling gases.homogeneous (no ironcore). -Rotates once every 10 hours (the fastest of the planets).
-Period of revolution: 30 years. -Saturn’s spectacular rings are composed of fragments of ice and F Ring: Gap between rock from moons and rings created by the asteroids that have Shepherd moons. come too close to Saturns Roche limit.-Scientists discovered a storm -Saturn has twoon Saturn in 1994. Located near moons known as theit’s equator, it stretches 12,700 Shepherd moonskm across, making its diameter which create a gap inroughly the same as that of the Saturn’s ring system.Earth.
-Period of revolution: 84 years. -Magnetic field is 50 times stronger than that of the Earth. -Uranus remarkably is tilted 59° from its axis of rotation causing it to rotate almost-Uranus also has its own ring completely sideways.system similar to Saturn. Theywere discovered by accident in -The moons of Uranus also1977 when the planet passed in rotate sideways on thefront of a star. The star’s light was planets axis, making it quitemomentarily blocked by each a unique sight.ring, thereby revealing theirexistence to astronomers.
-Period of revolution: 165years.-The winds on Neptuneblow as fast as 2000 km/hamong the fastest in thesolar system.-The Great DarkSpot, whose diameter atthe time was about thesame size as the Earth’sdiameter, is near the -Neptune has eight knowncenter of this picture. It moons. Seven have irregularhas since vanished. Note shapes and highly ellipticalthe white, wispy methane orbits, which suggest thatclouds. Neptune captured them.
-Period of revolution: 249 years. -On August 24, 2006, Scientists decided that Pluto is no longer a planet because it doesn’t clean up debris outside it’s atmosphere.Three properties to define aplanet:1. Needs to be spherical.2. Needs to revolve around a sun.3. Needs to be able to clean up debris outside it’s atmosphere.
Most comets that eventually return to the -This belt of comets extends out some 500inner solar system and develop the long AU from the sun. Astronomers estimatetails that we usually associate with are that the belt contains at least 200 millionbelieved to come from a region out comets.beyond the orbit of Pluto called theKuiper belt.