https://www.spitzer.caltech.edu/podcast/ask-an-astronomer.xml Real NASA astronomers answer questions about the exciting science of astronomy. en-us NASA's Spitzer Science Center / IPAC / NASA / Caltech Real NASA astronomers answer questions about the exciting science of astronomy. 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 / IPAC / NASA / Caltech Wed, 26 Aug 2009 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2009-001-where-is-the-center-of-the-universe 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 / IPAC / NASA / Caltech Thu, 05 Feb 2009 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask-what01-w-5-star-forming-region 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 / IPAC / NASA / Caltech Mon, 22 Dec 2008 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2008-007-why-is-the-sky-blue 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 / IPAC / NASA / Caltech Thu, 23 Oct 2008 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2008-006-what-s-between-the-stars 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 / IPAC / NASA / Caltech Mon, 25 Aug 2008 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask-5th-spitzer-s-fifth-anniversary 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 / IPAC / NASA / Caltech Tue, 01 Jul 2008 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2008-005-what-will-happen-to-the-earth-when-the-sun-dies 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 / IPAC / NASA / Caltech Thu, 08 May 2008 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2008-004-can-a-planet-have-two-suns 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 / IPAC / NASA / Caltech Thu, 10 Apr 2008 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2008-003-can-a-galaxy-die 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 / IPAC / NASA / Caltech Thu, 13 Mar 2008 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2008-002-why-aren-t-there-any-green-stars 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 / IPAC / NASA / Caltech Wed, 13 Feb 2008 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2008-001-how-do-you-discover-an-asteroid 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 / IPAC / NASA / Caltech Tue, 18 Dec 2007 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask-ir-infrared-more-than-your-eyes-can-see 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 / IPAC / NASA / Caltech Mon, 05 Nov 2007 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask-m51-m51-and-gizmo 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 / IPAC / NASA / Caltech Fri, 14 Sep 2007 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2007-002-what-happens-when-galaxies-collide 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 / IPAC / NASA / Caltech Fri, 27 Jul 2007 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2007-001-what-is-the-nearest-galaxy-to-the-milky-way 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 / IPAC / NASA / Caltech Mon, 12 Feb 2007 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2006-003-why-isn-t-pluto-a-planet-anymore ask2006-003-why-isn-t-pluto-a-planet-anymore 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 / IPAC / NASA / Caltech Thu, 24 Aug 2006 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2006-002-how-can-we-see-a-black-hole 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 / IPAC / NASA / Caltech Wed, 24 May 2006 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2006-001-what-is-a-redshift 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 / IPAC / NASA / Caltech Fri, 09 Dec 2005 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2005-002-do-the-stars-really-move 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 / IPAC / NASA / Caltech Tue, 25 Oct 2005 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2005-001-why-do-we-see-spiral-arms-in-some-galaxies ask2005-001-why-do-we-see-spiral-arms-in-some-galaxies 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 / IPAC / NASA / Caltech Fri, 14 Oct 2005 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2002-005-why-are-solar-eclipses-only-visible-in-some-parts-of-the-world ask2002-005-why-are-solar-eclipses-only-visible-in-some-parts-of-the-world 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 / IPAC / NASA / Caltech Fri, 14 Oct 2005 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2002-003-why-does-the-moon-look-like-it-changes ask2002-003-why-does-the-moon-look-like-it-changes 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 / IPAC / NASA / Caltech Fri, 14 Oct 2005 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2002-004-what-causes-an-eclipse-of-the-moon ask2002-004-what-causes-an-eclipse-of-the-moon clean 'Ask an Astronomer' tackles stellar evolution. 'Ask an Astronomer' tackles stellar evolution. 'Ask an Astronomer' tackles stellar evolution. NASA's Spitzer Science Center / IPAC / NASA / Caltech Fri, 14 Oct 2005 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2003-002-how-do-stars-live-and-die ask2003-002-how-do-stars-live-and-die 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 / IPAC / NASA / Caltech Fri, 14 Oct 2005 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2003-003-what-is-a-brown-dwarf ask2003-003-what-is-a-brown-dwarf 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 / IPAC / NASA / Caltech Fri, 14 Oct 2005 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2003-001-why-is-spitzer-painted-black ask2003-001-why-is-spitzer-painted-black 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 / IPAC / NASA / Caltech Fri, 14 Oct 2005 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2002-002-can-you-feel-a-solar-wind ask2002-002-can-you-feel-a-solar-wind 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 / IPAC / NASA / Caltech Fri, 14 Oct 2005 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2003-005-are-other-solar-systems-like-our-own ask2003-005-are-other-solar-systems-like-our-own 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 / IPAC / NASA / Caltech Fri, 14 Oct 2005 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2003-004-do-other-solar-systems-exist ask2003-004-do-other-solar-systems-exist 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 / IPAC / NASA / Caltech Fri, 14 Oct 2005 00:00:00 +0000 https://www.spitzer.caltech.edu/video/ask2002-001-why-doesn-t-the-moon-fall-down ask2002-001-why-doesn-t-the-moon-fall-down clean