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Our Solar system - PowerPoint PPT Presentation

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Our Solar system. The Milky Way . The Milky Way. The Milky Way contains about 200 billion stars The Milky Way moves at about 552km/s The Galaxy is about 100,000-120,000 light-years in diameter It is estimated that the Milky Way is 13.2 billion years old It is about 1,000 light-years thick

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the milky way
The Milky Way
  • The Milky Way contains about 200 billion stars
  • The Milky Way moves at about 552km/s
  • The Galaxy is about 100,000-120,000 light-years in diameter
  • It is estimated that the Milky Way is 13.2 billion years old
  • It is about 1,000 light-years thick
  • The Andromeda Galaxy is moving toward the Milky Way at 100-140km/s and within about 3-4 billion years the two galaxies may even join and form a new galaxy
the sun
The sun
  • The Sun’s mass is about 332,900 Earth masses
  • The Sun is close to 4 and a half billion years old
  • The Sun’s core has a temperature of around 15.7 million K
  • The Sun is roughly 149.6 million kilometers away from Earth
  • Looking directly at The Sun delivers about 4 milliwatts of sunlight to the retina, over a period of years this sunlight heats the retina to a point that it may even contribute to the cause of cataracts
  • NASA’s Pioneers 5,6,7,8, and 9 were the first satellites launched to examine The Sun and they were launched between 1959 and 1968

Terrestrial Planets








The Milky Way


  • The word Planet is Greek for “wandering star”
  • In order to be specified as a planet the celestial body must be big enough to be rounded by its own gravity
  • As of January 14, 2012 725 planets are listed in the Extrasolar Planets Encyclopaedia
  • A scientific study in 2012 estimated a mean of at least 1.6 planets for every star in the Milky Way
  • Six of the main eight planets in our Solar System have one or more natural satellites orbiting it.
the asteroid belt
The Asteroid Belt
  • Asteroids in the Asteroid belt are made of rocky and metallic minerals and ice
  • The Asteroid belt is located between Mars and Jupiter’s orbit
  • Asteroids can be as big as hundreds of kilometers across while others are miniscule.
  • The largest Asteroid is Ceres
  • Asteroids with diameters of around 10m are called meteoroids


  • Comets are made of mostly ice
  • When a comet comes to close to the sun its surface sublimates and creates a coma, dust and gas flowing behind the comet to create a long tail which we can see from earth
  • Some Comets orbit for around two hundred years while others last thousands of years.
  • As Comets get older sometimes they are changed to be asteroids.
  • http://planetpixelemporium.com/images/thumbnails/mercury.jpg
  • http://upload.wikimedia.org/wikipedia/commons/thumb/8/85/Venus_globe.jpg/220px-Venus_globe.jpg
  • http://rst.gsfc.nasa.gov/Sect16/full-20earth2.jpg
  • http://upload.wikimedia.org/wikipedia/commons/thumb/5/56/Mars_Valles_Marineris.jpeg/250px-Mars_Valles_Marineris.jpeg
  • http://www.gearthblog.com/images/images2006/jupiter.jpg
  • http://en.esimg.org/upl/2009/10/sun_milky_way.jpeg
  • http://upload.wikimedia.org/wikipedia/commons/thumb/8/89/236084main_MilkyWay-full-annotated.jpg/220px-236084main_MilkyWay-full-annotated.jpg
  • http://www.sciencephoto.com/image/324622/530wm/R3100073-Asteroid_belt-SPL.jpg
  • http://en.wikipedia.org/wiki/Solar_System
  • http://www.wsd1.org/laurasecord/Music/images/planets/Saturn.jpg
  • http://www.wsd1.org/laurasecord/Music/images/planets/Saturn.jpg
  • http://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Uranus2.jpg/240px-Uranus2.jpg
  • http://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Neptune.jpg/240px-Neptune.jpg
  • http://en.wikipedia.org/wiki/Sun
  • http://cdn4.digitaltrends.com/wp-content/uploads/2011/04/nasa-sun-spring-eclipse.jpg
  • http://www.cfa.harvard.edu/COMPLETE/learn/planets/Nineplanets460.jpg
  • http://en.wikipedia.org/wiki/Planet
  • http://images.nationalgeographic.com/wpf/media-live/photos/000/009/cache/halleys-comet_985_600x450.jpg