http://www.spitzer.caltech.edu/resource_list/10-Ask-an-Astronomer Real NASA astronomers answer questions about the exciting science of astronomy. en-us NASA's Spitzer Science Center and Infrared Processing and Analysis Center Brought to You by NASA's Spitzer Science Center (SSC) and the Infrared Processing and Analysis Center (IPAC) Real NASA astronomers answer questions about the exciting science of astronomy. © 2010 NASA. Commercial use prohibited. All other users must give proper credit. astronomy, ask, astronomer, ask an astronomer, spitzer space telescope, ipac, science, physics, NASA, NASA's, infrared astronomy NASA / SSC-IPAC outreach@ipac.caltech.edu clean http://www.rssboard.org/rss-specification Dr. Varoujan Gorjian explains the mind-boggling expansion of the Universe. Dr. Varoujan Gorjian explains the mind-boggling expansion of the Universe. Dr. Varoujan Gorjian explains the mind-boggling expansion of the Universe. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Wed, 26 Aug 2009 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/664-ask2009-001-Where-Is-the-Center-of-the-Universe- 664-ask2009-001-Where-Is-the-Center-of-the-Universe- clean Visit the W-5 star-forming region with 'Ask an Astronomer'! Visit the W-5 star-forming region with 'Ask an Astronomer'! Visit the W-5 star-forming region with 'Ask an Astronomer'! NASA's Spitzer Science Center and Infrared Processing and Analysis Center Thu, 05 Feb 2009 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/165-ask_what01-W-5-Star-Forming-Region 165-ask_what01-W-5-Star-Forming-Region clean 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. 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. 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. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Mon, 22 Dec 2008 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/163-ask2008-007-Why-Is-the-Sky-Blue- 163-ask2008-007-Why-Is-the-Sky-Blue- clean In this 'Ask an Astronomer' episode, Dr. Michelle Thaller explains how there can be an interstellar medium in a vacuum. In this 'Ask an Astronomer' episode, Dr. Michelle Thaller explains how there can be an interstellar medium in a vacuum. In this 'Ask an Astronomer' episode, Dr. Michelle Thaller explains how there can be an interstellar medium in a vacuum. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Thu, 23 Oct 2008 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/161-ask2008-006-What-s-Between-the-Stars- 161-ask2008-006-What-s-Between-the-Stars- clean This 'Ask an Astronomer' special looks at some of the biggest discoveries from NASA's Spitzer Space Telescope over the last five years. This 'Ask an Astronomer' special looks at some of the biggest discoveries from NASA's Spitzer Space Telescope over the last five years. This 'Ask an Astronomer' special looks at some of the biggest discoveries from NASA's Spitzer Space Telescope over the last five years. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Mon, 25 Aug 2008 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/159-ask_5th-Spitzer-s-Fifth-Anniversary 159-ask_5th-Spitzer-s-Fifth-Anniversary clean Our Sun won't last forever. Dr. Carolyn Brinkworth explains the ramifications for our home planet in this 'Ask an Astronomer' video. Our Sun won't last forever. Dr. Carolyn Brinkworth explains the ramifications for our home planet in this 'Ask an Astronomer' video. Our Sun won't last forever. Dr. Carolyn Brinkworth explains the ramifications for our home planet in this 'Ask an Astronomer' video. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Tue, 01 Jul 2008 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/157-ask2008-005-What-Will-Happen-to-the-Earth-When-the-Sun-Dies- 157-ask2008-005-What-Will-Happen-to-the-Earth-When-the-Sun-Dies- clean Dr. Carolyn Brinkworth addresses a famous science fiction scenario in this 'Ask an Astronomer' video. Dr. Carolyn Brinkworth addresses a famous science fiction scenario in this 'Ask an Astronomer' video. Dr. Carolyn Brinkworth addresses a famous science fiction scenario in this 'Ask an Astronomer' video. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Thu, 08 May 2008 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/155-ask2008-004-Can-a-Planet-Have-Two-Suns- 155-ask2008-004-Can-a-Planet-Have-Two-Suns- clean Dr. Varoujan Gorjian gives us the answer to this 'Ask an Astronomer' question. Dr. Varoujan Gorjian gives us the answer to this 'Ask an Astronomer' question. Dr. Varoujan Gorjian gives us the answer to this 'Ask an Astronomer' question. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Thu, 10 Apr 2008 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/152-ask2008-003-Can-a-Galaxy-Die- 152-ask2008-003-Can-a-Galaxy-Die- clean Dr. Michelle Thaller answers this question for 'Ask an Astronomer.' Dr. Michelle Thaller answers this question for 'Ask an Astronomer.' Dr. Michelle Thaller answers this question for 'Ask an Astronomer.' NASA's Spitzer Science Center and Infrared Processing and Analysis Center Thu, 13 Mar 2008 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/150-ask2008-002-Why-Aren-t-There-Any-Green-Stars- 150-ask2008-002-Why-Aren-t-There-Any-Green-Stars- clean Dr. Bidushi Bhattacharya helps us understand how astronomers find these tiny space rocks. Dr. Bidushi Bhattacharya helps us understand how astronomers find these tiny space rocks. Dr. Bidushi Bhattacharya helps us understand how astronomers find these tiny space rocks. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Wed, 13 Feb 2008 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/148-ask2008-001-How-Do-You-Discover-an-Asteroid- 148-ask2008-001-How-Do-You-Discover-an-Asteroid- clean 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. 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. 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. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Tue, 18 Dec 2007 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/145-ask_ir-Infrared-More-Than-Your-Eyes-Can-See 145-ask_ir-Infrared-More-Than-Your-Eyes-Can-See clean 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. 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. 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. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Mon, 05 Nov 2007 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/143-ask_m51-M51-and-Gizmo 143-ask_m51-M51-and-Gizmo clean Dr. Varoujan Gorjian takes us inside galactic collisions in this 'Ask an Astronomer' video. Dr. Varoujan Gorjian takes us inside galactic collisions in this 'Ask an Astronomer' video. Dr. Varoujan Gorjian takes us inside galactic collisions in this 'Ask an Astronomer' video. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Fri, 14 Sep 2007 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/141-ask2007-002-What-Happens-When-Galaxies-Collide- 141-ask2007-002-What-Happens-When-Galaxies-Collide- clean Dr. Michelle Thaller explains that the answer isn't as simple as you might think! Dr. Michelle Thaller explains that the answer isn't as simple as you might think! Dr. Michelle Thaller explains that the answer isn't as simple as you might think! NASA's Spitzer Science Center and Infrared Processing and Analysis Center Fri, 27 Jul 2007 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/139-ask2007-001-What-Is-the-Nearest-Galaxy-to-the-Milky-Way- 139-ask2007-001-What-Is-the-Nearest-Galaxy-to-the-Milky-Way- clean Dr. Robert Hurt explains why Pluto got... well... plutoed. Dr. Robert Hurt explains why Pluto got... well... plutoed. Dr. Robert Hurt explains why Pluto got... well... plutoed. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Mon, 12 Feb 2007 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/136-ask2006-003-Why-Isn-t-Pluto-a-Planet-Any-More- 136-ask2006-003-Why-Isn-t-Pluto-a-Planet-Any-More- clean If no light escapes from a black hole, how can we detect them? 'Ask an Astronomer' explains. If no light escapes from a black hole, how can we detect them? 'Ask an Astronomer' explains. If no light escapes from a black hole, how can we detect them? 'Ask an Astronomer' explains. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Thu, 24 Aug 2006 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/129-ask2006-002-How-Can-We-See-a-Black-Hole- 129-ask2006-002-How-Can-We-See-a-Black-Hole- clean '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' uses an astronomer, a flying saucer, and a cow to help explain this difficult astronomical concept in simple terms. 'Ask an Astronomer' uses an astronomer, a flying saucer, and a cow to help explain this difficult astronomical concept in simple terms. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Wed, 24 May 2006 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/125-ask2006-001-What-Is-a-Redshift- 125-ask2006-001-What-Is-a-Redshift- clean The answer to this 'Ask an Astronomer' question may surprise you! The answer to this 'Ask an Astronomer' question may surprise you! The answer to this 'Ask an Astronomer' question may surprise you! NASA's Spitzer Science Center and Infrared Processing and Analysis Center Fri, 09 Dec 2005 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/121-ask2005-002-Do-the-Stars-Really-Move- 121-ask2005-002-Do-the-Stars-Really-Move- clean 'Ask an Astronomer' explains the morphology of one of the most common types of galaxy. 'Ask an Astronomer' explains the morphology of one of the most common types of galaxy. 'Ask an Astronomer' explains the morphology of one of the most common types of galaxy. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Tue, 25 Oct 2005 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/115-ask2005-001-Why-Do-We-See-Spiral-Arms-in-Some-Galaxies- 115-ask2005-001-Why-Do-We-See-Spiral-Arms-in-Some-Galaxies- clean 'Ask an Astronomer' explains one of the strangest objects in outer space. 'Ask an Astronomer' explains one of the strangest objects in outer space. 'Ask an Astronomer' explains one of the strangest objects in outer space. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Fri, 14 Oct 2005 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/106-ask2003-003-What-Is-a-Brown-Dwarf- 106-ask2003-003-What-Is-a-Brown-Dwarf- clean 'Ask an Astronomer' explains how we detect planets around other stars. 'Ask an Astronomer' explains how we detect planets around other stars. 'Ask an Astronomer' explains how we detect planets around other stars. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Fri, 14 Oct 2005 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/110-ask2003-004-Do-Other-Solar-Systems-Exist- 110-ask2003-004-Do-Other-Solar-Systems-Exist- clean Solar systems come in a large variety of flavors, as this 'Ask an Astronomer' video shows. Solar systems come in a large variety of flavors, as this 'Ask an Astronomer' video shows. Solar systems come in a large variety of flavors, as this 'Ask an Astronomer' video shows. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Fri, 14 Oct 2005 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/113-ask2003-005-Are-Other-Solar-Systems-Like-Our-Own- 113-ask2003-005-Are-Other-Solar-Systems-Like-Our-Own- clean 'Ask an Astronomer' tackles stellar evolution. 'Ask an Astronomer' tackles stellar evolution. 'Ask an Astronomer' tackles stellar evolution. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Fri, 14 Oct 2005 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/104-ask2003-002-How-Do-Stars-Live-and-Die- 104-ask2003-002-How-Do-Stars-Live-and-Die- clean The Spitzer Space Telescope has a funny paint job. This 'Ask an Astronomer' segment explains why. The Spitzer Space Telescope has a funny paint job. This 'Ask an Astronomer' segment explains why. The Spitzer Space Telescope has a funny paint job. This 'Ask an Astronomer' segment explains why. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Fri, 14 Oct 2005 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/99-ask2003-001-Why-Is-Spitzer-Painted-Black- 99-ask2003-001-Why-Is-Spitzer-Painted-Black- clean This 'Ask an Astronomer' episode explains eclipses of the sun and why they can't be seen everywhere. This 'Ask an Astronomer' episode explains eclipses of the sun and why they can't be seen everywhere. This 'Ask an Astronomer' episode explains eclipses of the sun and why they can't be seen everywhere. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Fri, 14 Oct 2005 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/92-ask2002-005-Why-Are-Solar-Eclipses-Only-Visible-in-Some-Parts-of-the-World- 92-ask2002-005-Why-Are-Solar-Eclipses-Only-Visible-in-Some-Parts-of-the-World- clean This 'Ask an Astronomer' episode explains lunar eclipses. This 'Ask an Astronomer' episode explains lunar eclipses. This 'Ask an Astronomer' episode explains lunar eclipses. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Fri, 14 Oct 2005 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/84-ask2002-004-What-Causes-an-Eclipse-of-the-Moon- 84-ask2002-004-What-Causes-an-Eclipse-of-the-Moon- clean Phases of the Moon are clearly explained in this 'Ask an Astronomer' episode. Phases of the Moon are clearly explained in this 'Ask an Astronomer' episode. Phases of the Moon are clearly explained in this 'Ask an Astronomer' episode. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Fri, 14 Oct 2005 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/73-ask2002-003-Why-Does-the-Moon-Look-Like-It-Changes- 73-ask2002-003-Why-Does-the-Moon-Look-Like-It-Changes- clean This 'Ask an Astronomer' segment attempts to explain what a solar wind is (and is not). This 'Ask an Astronomer' segment attempts to explain what a solar wind is (and is not). This 'Ask an Astronomer' segment attempts to explain what a solar wind is (and is not). NASA's Spitzer Science Center and Infrared Processing and Analysis Center Fri, 14 Oct 2005 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/71-ask2002-002-Can-You-Feel-a-Solar-Wind- 71-ask2002-002-Can-You-Feel-a-Solar-Wind- clean This 'Ask an Astronomer' episode explains how orbits work. This 'Ask an Astronomer' episode explains how orbits work. This 'Ask an Astronomer' episode explains how orbits work. NASA's Spitzer Science Center and Infrared Processing and Analysis Center Fri, 14 Oct 2005 00:00:00 +0000 http://www.spitzer.caltech.edu/video-audio/62-ask2002-001-Why-Doesn-t-the-Moon-Fall-Down- 62-ask2002-001-Why-Doesn-t-the-Moon-Fall-Down- clean