"Where is the center of the Universe?" Answered by Dr. Varoujan Gorjian of NASA's Spitzer Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)	W-5 Star-Forming Region Narrated by Dr. Robert Hurt of NASA's Spitzer Science Center Windows Media: 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
GLOSSARY

Below you will find a list of questions that have video answers available. To view a segment, simply select your connection speed after the format you wish to view the answer in. (Windows Media is more common for PC users, and QuickTime is more common for Macintosh users. However, players exist for all formats on both platforms.)

A video podcast version of these videos is available. iTunes users can subscribe directly. Users of other RSS aggregators can bookmark the RSS feed.

	"Why is the sky blue?" Answered by Dr. Carolyn Brinkworth of NASA's Spitzer Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"What's between the stars?" Answered by Dr. Michelle Thaller of NASA's Spitzer Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"What will happen to the Earth when the Sun dies?" Answered by Dr. Carolyn Brinkworth of NASA's Spitzer Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"Can a planet have two suns?" Answered by Dr. Carolyn Brinkworth of NASA's Spitzer Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"Can a galaxy die?" Answered by Dr. Varoujan Gorjian of NASA's Jet Propulsion Laboratory Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"Why aren't there any green stars?" Answered by Dr. Michelle Thaller of NASA's Spitzer Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"How do you discover an asteroid?" Answered by Dr. Bidushi Bhattacharya of NASA's Infrared Processing and Analysis Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"What happens when galaxies collide?" Answered by Dr. Varoujan Gorjian of NASA's Jet Propulsion Laboratory Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"What is the nearest galaxy to the Milky Way?" Answered by Dr. Michelle Thaller of NASA's Spitzer Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"Why isn't Pluto a planet any more?" Answered by Dr. Robert Hurt of NASA's Infrared Processing and Analysis Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"How can we see a black hole?" Answered by Dr. Tom Jarrett of NASA's Infrared Processing and Analysis Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"What is a redshift?" Answered by Dr. Tom Jarrett of NASA's Infrared Processing and Analysis Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"Do the stars really move?" Answered by Dr. Steve Lord of NASA's Infrared Processing and Analysis Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Awards | Transcript (PDF or DOC)
	"Why do we see spiral arms in some galaxies?" Answered by Dr. Steve Lord of NASA's Infrared Processing and Analysis Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"Do other solar systems exist?" Answered by Dr. Davy Kirkpatrick of NASA's Infrared Processing and Analysis Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"Are other solar systems like our own?" Answered by Dr. Davy Kirkpatrick of NASA's Infrared Processing and Analysis Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"What is a brown dwarf?" Answered by Dr. Davy Kirkpatrick of NASA's Infrared Processing and Analysis Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Awards | Transcript (PDF or DOC)
	"How do stars live and die?" Answered by Dr. Michelle Thaller of the SIRTF Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Awards | Transcript (PDF or DOC)
	"Why is Spitzer painted black?" Answered by Dr. Michelle Thaller of the SIRTF Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"Why are solar eclipses only visible in some parts of the world?" Answered by Dr. Susan Stolovy of the SIRTF Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"What causes an eclipse of the moon?" Answered by Doris Daou of the SIRTF Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"Why does the moon look like it changes?" Answered by Doris Daou of the SIRTF Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Awards | Transcript (PDF or DOC)
	"Can you feel a solar wind?" Answered by Dr. Robert Hurt of the SIRTF Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	"Why doesn't the moon fall down?" Answered by Doris Daou of the SIRTF Science Center Windows Media: 160x120 | 320x240 QuickTime 4.0: 160x120 | 320x240 QuickTime 6.0: 320x240 MPEG-4 (for iPod): 640x480 Credits | Transcript (PDF or DOC)
	Introduction to "Ask an Astronomer" Presented by Doris Daou of the SIRTF Science Center Windows Media: 160x120 | 320x240 Quicktime 4.0: 160x120 | 320x240 Quicktime 6.0: 320x240 Credits

A video podcast version of these videos is available. iTunes users can subscribe directly. (Users of other RSS aggregators can find the feed located at http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/video/podcast/askfeed.xml ).

Brought to you by the Cool Cosmos Team (the joint Education and Public Outreach group for the Spitzer Space Telescope and the Infrared Processing and Analysis Center) located at the California Institute of Technology in Pasadena, California. These videos may be redistributed for educational purposes only, provided credit is given to NASA and Caltech in all instances. NASA and Caltech make no warranties as to the quality of presentation or accuracy of information provided herein, as these videos are intended for entertainment and general education purposes only. All other rights reserved.