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Ask an Astronomer

NASA's Spitzer Science Center and Infrared Processing and Analysis Center

Real NASA astronomers answer questions about the exciting science of astronomy.



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Ask an Astronomer
Aug 26, 2009 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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Dr. Varoujan Gorjian explains the mind-boggling expansion of the Universe.
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Feb 5, 2009 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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Visit the W-5 star-forming region with 'Ask an Astronomer'!
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Dec 22, 2008 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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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.
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Oct 23, 2008 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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In this 'Ask an Astronomer' episode, Dr. Michelle Thaller explains how there can be an interstellar medium in a vacuum.
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Aug 25, 2008 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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This 'Ask an Astronomer' special looks at some of the biggest discoveries from NASA's Spitzer Space Telescope over the last five years.
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Jul 1, 2008 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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Our Sun won't last forever. Dr. Carolyn Brinkworth explains the ramifications for our home planet in this 'Ask an Astronomer' video.
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May 8, 2008 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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Dr. Carolyn Brinkworth addresses a famous science fiction scenario in this 'Ask an Astronomer' video.
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Apr 10, 2008 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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Dr. Varoujan Gorjian gives us the answer to this 'Ask an Astronomer' question.
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Mar 13, 2008 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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Dr. Michelle Thaller answers this question for 'Ask an Astronomer.'
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Feb 13, 2008 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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Dr. Bidushi Bhattacharya helps us understand how astronomers find these tiny space rocks.
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Dec 18, 2007 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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Dr. Michelle Thaller explains infrared light in this older video, produced by NASA's Spitzer Space Telescope (then known as the Space Infrared Telescope Facility) before it launched.
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Nov 5, 2007 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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In this animated 'Ask an Astronomer' special, innocent alien M51 moves the Earth into a closer orbit around the sun, and learns an important lesson about life in the Universe.
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Sep 14, 2007 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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Dr. Varoujan Gorjian takes us inside galactic collisions in this 'Ask an Astronomer' video.
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Jul 27, 2007 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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Dr. Michelle Thaller explains that the answer isn't as simple as you might think!
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Feb 12, 2007 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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Dr. Robert Hurt explains why Pluto got... well... plutoed.
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Aug 24, 2006 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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If no light escapes from a black hole, how can we detect them? 'Ask an Astronomer' explains.
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May 24, 2006 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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'Ask an Astronomer' uses an astronomer, a flying saucer, and a cow to help explain this difficult astronomical concept in simple terms.
Ask an Astronomer
Dec 9, 2005 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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The answer to this 'Ask an Astronomer' question may surprise you!
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Oct 25, 2005 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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'Ask an Astronomer' explains the morphology of one of the most common types of galaxy.
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Oct 14, 2005 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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This 'Ask an Astronomer' episode explains eclipses of the sun and why they can't be seen everywhere.
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Oct 14, 2005 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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This 'Ask an Astronomer' segment attempts to explain what a solar wind is (and is not).
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Oct 14, 2005 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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'Ask an Astronomer' explains how we detect planets around other stars.
Ask an Astronomer
Oct 14, 2005 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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'Ask an Astronomer' explains one of the strangest objects in outer space.
Ask an Astronomer
Oct 14, 2005 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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This 'Ask an Astronomer' episode explains lunar eclipses.
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Oct 14, 2005 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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'Ask an Astronomer' tackles stellar evolution.
Ask an Astronomer
Oct 14, 2005 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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The Spitzer Space Telescope has a funny paint job. This 'Ask an Astronomer' segment explains why.
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Oct 14, 2005 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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This 'Ask an Astronomer' episode explains how orbits work.
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Oct 14, 2005 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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Phases of the Moon are clearly explained in this 'Ask an Astronomer' episode.
Ask an Astronomer
Oct 14, 2005 NASA's Spitzer Science Center and Infrared Processing and Analysis Center
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Solar systems come in a large variety of flavors, as this 'Ask an Astronomer' video shows.