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Ask an Astronomer
  • Where Is the Center of the Universe? by NASA's Spitzer Science Center and Infrared Processing and Analysis Center Aug 25, 2009
    Dr. Varoujan Gorjian explains the mind-boggling expansion of the Universe.
  • W-5 Star-Forming Region by NASA's Spitzer Science Center and Infrared Processing and Analysis Center Feb 4, 2009
    Visit the W-5 star-forming region with 'Ask an Astronomer'!
  • Why Is the Sky Blue? by NASA's Spitzer Science Center and Infrared Processing and Analysis Center Dec 21, 2008
    In this 'Ask an Astronomer' episode, Dr. Carolyn Brinkworth fills us in on what the color of the sky has to do with finding life on distant planets.
  • What's Between the Stars? by NASA's Spitzer Science Center and Infrared Processing and Analysis Center Oct 22, 2008
    In this 'Ask an Astronomer' episode, Dr. Michelle Thaller explains how there can be an interstellar medium in a vacuum.
  • Spitzer's Fifth Anniversary by NASA's Spitzer Science Center and Infrared Processing and Analysis Center Aug 24, 2008
    This 'Ask an Astronomer' special looks at some of the biggest discoveries from NASA's Spitzer Space Telescope over the last five years.
  • What Will Happen to the Earth When the Sun Dies? by NASA's Spitzer Science Center and Infrared Processing and Analysis Center Jun 30, 2008
    Our Sun won't last forever. Dr. Carolyn Brinkworth explains the ramifications for our home planet in this 'Ask an Astronomer' video.
  • Can a Planet Have Two Suns? by NASA's Spitzer Science Center and Infrared Processing and Analysis Center May 7, 2008
    Dr. Carolyn Brinkworth addresses a famous science fiction scenario in this 'Ask an Astronomer' video.
  • Can a Galaxy Die? by NASA's Spitzer Science Center and Infrared Processing and Analysis Center Apr 9, 2008
    Dr. Varoujan Gorjian gives us the answer to this 'Ask an Astronomer' question.
  • Why Aren't There Any Green Stars? by NASA's Spitzer Science Center and Infrared Processing and Analysis Center Mar 12, 2008
    Dr. Michelle Thaller answers this question for 'Ask an Astronomer.'
  • How Do You Discover an Asteroid? by NASA's Spitzer Science Center and Infrared Processing and Analysis Center Feb 12, 2008
    Dr. Bidushi Bhattacharya helps us understand how astronomers find these tiny space rocks.