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Recent Podcast
A Tour of Eta Carinae
A Tour of Eta Carinae
New Chandra data are helping astronomers better understand how the two stars in Eta Carinae interact with one another through powerful winds blowing off their surfaces. (2014-08-27)


Video Podcasts: The Incredible Two-Inch Universe

Step 2: The Realm of Our Sun the Only Star in Our Solar System

View/Listen
Now let's switch scales by shrinking the minivan-sized Sun down to a 2-inch diameter:
  • Earth Size - A grain of salt, with a dust-speck Moon 1/2 inch away from it
  • Sun-Earth Distance - 20 feet (5.5 m) - or 10 paces away
  • Pluto's Orbit - 2.5 soccer fields away from the 2-inch Sun
  • Nearest Star to Sun - 900 miles away (1500 km)
  • Light Travel Time - It takes 8 minutes for a beam of light to travel from the Sun to the Earth.
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