Spitzer Celebrates Fourth Anniversary with Celestial Fireworks

Comets Kick up Dust in Helix Nebula

Dragon's Lair

Star Clusters Young and Old, Near and Far

Extreme Planets (Artist Concept)

Is There Anybody Home?

Galaxy NGC 3079

WISE Catches Comet 65P/Gunn

A Collage of Nearby Galaxies

It's Raining Comets (Artist's Concept)

Analyzing the Pieces of a Warped Galaxy

Galaxy Messier 51

Dusty Dead Star

An Unusual Planetary System (Artist's Concept)

Scenarios for the Evolution of Asteroid Belts

Fire and Ice Planet (Artist Concept)

Highlighting our Tiniest Neighbors

Barred Spiral Galaxy NGC 1365

"No Organics" Zone Circles Pinwheel

Zeta Ophiuchi -- Runaway Star Plowing through Space Dust

Centaurus A All Prettied Up in Infrared and X-Rays

A Planet as Big as its Star

The Swirling Arms of the M100 Galaxy

Before the Smashup (Artist's Concept)

Dwarf Star Erupts in Giant Flare

Finding Forsterite Around a Developing Star

The Light and Dark Sides of a Distant Planet

M33: A Close Neighbor Reveals its True Size and Splendor (3-color composite)

NGC 1316

The Milky Way Center Aglow with Dust

Space Balls (Artist's Concept)

Cool Andromeda

Ghostly Ring

What's Old is New in the Large Magellanic Cloud

Andromeda

Mapping the Infrared Universe: Part 1

Climbing the Cosmic Distance Ladder (Artist's Concept)

Seeing Baby Dwarf Galaxies

Collecting Brown Dwarfs in the Night Sky

Plentiful Planetary System (Artist Concept)

Kepler-20e -- The Smallest Exoplanet (Artist's Concept)

Hubble Sees Stars and a Stripe in Celestial Fireworks

Does 'Pacman' Have Teeth?

The Colorful Demise of a Sun-like Star

A Distant Solar System (Artist's Concept Animation)

How to Measure the Spin of a Black Hole (Artist's Concept)

Forecasting Weather on Distant Worlds (Artist Concept)

Planck's View of Orion

Triple Scoop from Galaxy Hunter

Pointing X-ray Eyes at our Resident Supermassive Black Hole