Spitzer's Fifth Anniversary

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08.25.08

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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ask2009-001

08.26.09

Where Is the Center of the Universe?

ask_what01

02.05.09

W-5 Star-Forming Region

ask2008-007

12.22.08

Why Is the Sky Blue?

ask2008-006

10.23.08

What's Between the Stars?

ask_5th

08.25.08

Spitzer's Fifth Anniversary

ask2008-005

07.01.08

What Will Happen to the Earth When the Sun Dies?

ask2008-004

05.08.08

Can a Planet Have Two Suns?

ask2008-003

04.10.08

Can a Galaxy Die?

ask2008-002

03.13.08

Why Aren't There Any Green Stars?

ask2008-001

02.13.08

How Do You Discover an Asteroid?

ask_ir

12.18.07

Infrared: More Than Your Eyes Can See

ask_m51

11.05.07

M51 and Gizmo

ask2007-002

09.14.07

What Happens When Galaxies Collide?

ask2007-001

07.27.07

What Is the Nearest Galaxy to the Milky Way?

ask2006-003

02.12.07

Why Isn't Pluto a Planet Any More?

ask2006-002

08.24.06

How Can We See a Black Hole?

ask2006-001

05.24.06

What Is a Redshift?

ask2005-002

12.09.05

Do the Stars Really Move?

ask2005-001

10.25.05

Why Do We See Spiral Arms in Some Galaxies?

ask2003-003

10.14.05

What Is a Brown Dwarf?

ask2003-004

10.14.05

Do Other Solar Systems Exist?

ask2003-005

10.14.05

Are Other Solar Systems Like Our Own?

ask2003-002

10.14.05

How Do Stars Live and Die?

ask2003-001

10.14.05

Why Is Spitzer Painted Black?

ask2002-005

10.14.05

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

ask2002-004

10.14.05

What Causes an Eclipse of the Moon?

ask2002-003

10.14.05

Why Does the Moon Look Like It Changes?

ask2002-002

10.14.05

Can You Feel a Solar Wind?

ask2002-001

10.14.05

	March 19 The Wise Sky (Gallery Explorer)
	June 1 When Worlds Collide (Showcase)
	July 9 The Dragon and the Swan (Gallery Explorer)
	February 5 The Many Views of the Milky Way (Gallery Explorer)
	November 25 The One Ring of Saturn (Showcase)

	Hidden Universe: NASA's Spitzer Space Telescope
	IRrelevant Astronomy
	Ask an Astronomer
	Audio Podcasts
	El Universo Escondido: NASA's Spitzer Space Telescope

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