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Ask an Astronomer Videos



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



Copyright: ℗ & © 2002-2008 NASA. Commercial use prohibited. All other users must give proper credit.
 



Where Is the Center of the Universe?

Wed, 26 Aug 2009 13:20:00 PDT

Dr. Varoujan Gorjian explains the mind-boggling expansion of the Universe.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2009-001.m4v




What Is It? (W-5 Star-Forming Region)

Thu, 05 Feb 2009 14:07:00 PST

Visit the W-5 star-forming region with Ask an Astronomer!


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/whatisit01.m4v




Why Is the Sky Blue?

Mon, 22 Dec 2008 16:11:00 PST

Dr. Carolyn Brinkworth fills us in on what the color of the sky has to do with finding life on distant planets.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2008-007.m4v




What's Between the Stars?

Thu, 23 Oct 2008 13:55:00 PDT

Dr. Michelle Thaller explains how there can be an interstellar medium in a vacuum.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2008-006.m4v




Special: Spitzer Turns Five

Mon, 25 Aug 2008 10:00:00 PDT

On the Spitzer Space Telescope's fifth anniversary, we look back at a few of its most remarkable discoveries.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/spitzer_fifth_anniversary.m4v




What Will Happen to the Earth When the Sun Dies?

Tue, 01 Jul 2008 09:20:00 PDT

Our Sun won't last forever. Dr. Carolyn Brinkworth explains the ramifications for our home planet.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2008-005.m4v




Can a Planet Have Two Suns?

Thu, 08 May 2008 10:00:00 PDT

Dr. Carolyn Brinkworth examines whether science fiction could be science fact.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2008-004.m4v




Can a Galaxy Die?

Thu, 10 Apr 2008 09:40:00 PDT

Dr. Varoujan Gorjian fills us in on the end of a galaxy.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2008-003.m4v




Why Aren't There Any Green Stars?

Thu, 13 Mar 2008 14:25:00 PDT

Dr. Michelle Thaller explains why some stars appear red or blue, but not green.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2008-002.m4v




How Do You Discover an Asteroid?

Wed, 13 Feb 2008 11:04:00 PST

Dr. Bidushi Bhattacharya helps us understand how astronomers find these tiny space rocks.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2008-001.m4v




Special: Infrared: More Than Your Eyes Can See

Tue, 18 Dec 2007 13:30:00 PST

Dr. Michelle Thaller explains infrared light in this classic video.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/IR_Video_4AaA.m4v




Special: M51 and Gizmo in 'Half-Baked Plan'

Mon, 05 Nov 2007 11:45:00 PST

What makes the Earth livable? In this special animated cartoon, innocent alien M51 moves the Earth into a closer orbit around the sun, and learns an important lesson about life in the Universe.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/m51.m4v




What Happens When Galaxies Collide?

Fri, 14 Sep 2007 11:45:00 PDT

Dr. Varoujan Gorjian takes us inside interacting galaxies.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2007-002_podcast.m4v




What Is the Nearest Galaxy to the Milky Way?

Fri, 27 Jul 2007 14:15:00 PDT

Dr. Michelle Thaller takes us into the murky answer to this not-so-simple question.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2007-001_podcast.m4v




Why Isn't Pluto a Planet Any More?

Mon, 12 Feb 2007 16:15:00 PDT

Dr. Robert Hurt explains why Pluto got... well... plutoed.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2006-003_podcast.m4v




How Can We See a Black Hole?

Thu, 24 Aug 2006 16:20:00 PDT

If no light can escape from a black hole, how do we see them? Dr. Tom Jarrett answers.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2006-002_podcast.m4v




What Is a Redshift?

Wed, 24 May 2006 15:30:00 PDT

Dr. Tom Jarrett helps us understand this difficult scientific concept using a biplane, a flying saucer, and a cow.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2006-001_podcast.m4v




Do the Stars Really Move?

Fri, 9 Dec 2005 18:00:00 PDT

Dr. Steve Lord explains that the stars do move, but not in the way they appear to.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2005-002_podcast.m4v




Why Do We See Spiral Arms in Some Galaxies?

Tue, 25 Oct 2005 15:00:00 PDT

Dr. Steve Lord describes the processes that cause us to see spiral arms.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2005-001_podcast.m4v




Are Other Solar Systems Like Our Own?

Fri, 14 Oct 2005 16:00:00 PDT

Dr. Davy Kirkpatrick explains the weird and wonderful solar systems we know about.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2003-005_podcast.m4v




Do Other Solar Systems Exist?

Fri, 14 Oct 2005 16:00:00 PDT

Dr. Davy Kirkpatrick discusses extrasolar planets.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2003-004_podcast.m4v




What Is a Brown Dwarf?

Fri, 14 Oct 2005 16:00:00 PDT

Dr. Davy Kirkpatrick explains the nature of one of the most unusual objects in space.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2003-003_podcast.m4v




How Do Stars Live and Die?

Fri, 14 Oct 2005 16:00:00 PDT

Dr. Michelle Thaller explains the life cycle of stars.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2003-002_podcast.m4v




Why Is Spitzer Painted Black?

Fri, 14 Oct 2005 16:00:00 PDT

Dr. Michelle Thaller explains the color scheme of the Spitzer Space Telescope.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2003-001_podcast.m4v




Why Are Solar Eclipses Only Visible in Some Parts of the World?

Fri, 14 Oct 2005 16:00:00 PDT

Dr. Susan Stolovy answers the question of why only certain regions can see a solar eclipse.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2002-005_podcast.m4v







Why Does the Moon Look Like It Changes?

Fri, 14 Oct 2005 16:00:00 PDT

Doris Daou answers a question about the phases of the moon.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2002-003_podcast.m4v




Can You Feel a Solar Wind?

Fri, 14 Oct 2005 16:00:00 PDT

Dr. Robert Hurt answers a question about solar physics.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2002-002_podcast.m4v




Why Doesn't the Moon Fall Down?

Fri, 14 Oct 2005 16:00:00 PDT

Doris Daou answers a question about gravity and orbits.


Media Files:
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/2002-001_podcast.m4v