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ask2009-001

08.26.09

Where Is the Center of the Universe?

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

ask_what01

02.05.09

W-5 Star-Forming Region

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

ask2008-007

12.22.08

Why Is the Sky Blue?

In this 'Ask an Astronomer' episode, Dr. Carolyn Brinkworth fills us in on what the color of the sky has to do with f... watch now

ask2008-006

10.23.08

What's Between the Stars?

In this 'Ask an Astronomer' episode, Dr. Michelle Thaller explains how there can be an interstellar medium in a vacuum. watch now

ask_5th

08.25.08

Spitzer's Fifth Anniversary

This 'Ask an Astronomer' special looks at some of the biggest discoveries from NASA's Spitzer Space Telescope over th... watch now

ask2008-005

07.01.08

What Will Happen to the Earth When the Sun Dies?

Our Sun won't last forever. Dr. Carolyn Brinkworth explains the ramifications for our home planet in this 'Ask an Ast... watch now

ask2008-004

05.08.08

Can a Planet Have Two Suns?

Dr. Carolyn Brinkworth addresses a famous science fiction scenario in this 'Ask an Astronomer' video. watch now

ask2008-003

04.10.08

Can a Galaxy Die?

Dr. Varoujan Gorjian gives us the answer to this 'Ask an Astronomer' question. watch now

ask2008-002

03.13.08

Why Aren't There Any Green Stars?

Dr. Michelle Thaller answers this question for 'Ask an Astronomer.' watch now

ask2008-001

02.13.08

How Do You Discover an Asteroid?

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

ask_ir

12.18.07

Infrared: More Than Your Eyes Can See

Dr. Michelle Thaller explains infrared light in this older video, produced by NASA's Spitzer Space Telescope (then kn... watch now

ask_m51

11.05.07

M51 and Gizmo

In this animated 'Ask an Astronomer' special, innocent alien M51 moves the Earth into a closer orbit around the sun, ... watch now

ask2007-002

09.14.07

What Happens When Galaxies Collide?

Dr. Varoujan Gorjian takes us inside galactic collisions in this 'Ask an Astronomer' video. watch now

ask2007-001

07.27.07

What Is the Nearest Galaxy to the Milky Way?

Dr. Michelle Thaller explains that the answer isn't as simple as you might think! watch now

ask2006-003

02.12.07

Why Isn't Pluto a Planet Anymore?

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

ask2006-002

08.24.06

How Can We See a Black Hole?

If no light escapes from a black hole, how can we detect them? 'Ask an Astronomer' explains. watch now

ask2006-001

05.24.06

What Is a Redshift?

'Ask an Astronomer' uses an astronomer, a flying saucer, and a cow to help explain this difficult astronomical concep... watch now

ask2005-002

12.09.05

Do the Stars Really Move?

The answer to this 'Ask an Astronomer' question may surprise you! watch now

ask2005-001

10.25.05

Why Do We See Spiral Arms in Some Galaxies?

'Ask an Astronomer' explains the morphology of one of the most common types of galaxy. watch now

ask2003-004

10.14.05

Do Other Solar Systems Exist?

'Ask an Astronomer' explains how we detect planets around other stars. watch now

ask2002-001

10.14.05

Why Doesn't the Moon Fall Down?

This 'Ask an Astronomer' episode explains how orbits work. watch now

ask2003-002

10.14.05

How Do Stars Live and Die?

'Ask an Astronomer' tackles stellar evolution. watch now

ask2003-003

10.14.05

What Is a Brown Dwarf?

'Ask an Astronomer' explains one of the strangest objects in outer space. watch now

ask2003-005

10.14.05

Are Other Solar Systems Like Our Own?

Solar systems come in a large variety of flavors, as this 'Ask an Astronomer' video shows. watch now

ask2002-005

10.14.05

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

This 'Ask an Astronomer' episode explains eclipses of the sun and why they can't be seen everywhere. watch now

ask2002-003

10.14.05

Why Does the Moon Look Like It Changes?

Phases of the Moon are clearly explained in this 'Ask an Astronomer' episode. watch now

ask2003-001

10.14.05

Why Is Spitzer Painted Black?

The Spitzer Space Telescope has a funny paint job. This 'Ask an Astronomer' segment explains why. watch now

ask2002-002

10.14.05

Can You Feel a Solar Wind?

This 'Ask an Astronomer' segment attempts to explain what a solar wind is (and is not). watch now

ask2002-004

10.14.05

What Causes an Eclipse of the Moon?

This 'Ask an Astronomer' episode explains lunar eclipses. watch now

svg03-01

08.25.03

Infrared Launch

When Spitzer launched Monday, 25 August 2003 at 1:35:39 a.m. EDT from Cape Canaveral Air Force Station in Florida, me... watch now

ssv006

01.01.03

Artist Concept - Spitzer Cover Ejection

Spitzer ejects its dust cover. watch now

ssv004

01.01.03

Artist Concept - Flyaround of Spitzer

A flyaround of Spitzer in orbit. watch now

ssv009

01.01.03

Artist Concept - Spitzer Flies Away

Spitzer speeds away from Earth after its separation from its Delta II rocket. watch now

ssv005

01.01.03

Artist Concept - Spitzer Observation Cycle

An observation cycle is illustrated in this animation, with Spitzer obtaining data, transmitting that data to Earth, ... watch now

ssv001

01.01.03

Artist Concept - Spitzer IR Flyaround

Spitzer is portrayed here against an infrared sky. watch now

ssv007

01.01.03

Artist Concept - Spitzer Orbit

Spitzer's innovative Earth-trailing orbit is depicted. watch now

ssv010

01.01.03

Artist Concept - Spitzer Top View

View of Spitzer from the top watch now

ssv003

01.01.03

Artist Concept - Spitzer Visible and IR view 2

Spitzer is portrayed here first in visible light, then against the same background in the infrared. watch now

ssv002

01.01.03

Artist Concept - Spitzer Visible and IR view 1

Spitzer is portrayed here first in visible light, then against the same background in the infrared. watch now

 

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