Mars Rover Curiosity in Artist's Concept, Wide

NASA's Salt-Seeking Instrument Gets a Silvery Blanket

New Galaxy Quest Readies for Launch

Mars Science Laboratory Guided Entry at Mars, Artist's Concept

Animated Optical Microscope Zoom in from Phoenix Launch to Martian Surface

Shooting Lasers

Mars Science Laboratory's Cruise Stage in Test Chamber

After a Crabwalk Test

GRAIL Twins are Covered

Aquarius - SAC-D Spacecraft is Prepped for Shipping

Camera Test on Curiosity During Flight to Mars

'Y Dwarf' Chillin' in Space (Artist's Concept)

Cruising to Mars

Galaxy Feeds Off Gas (Artist Concept)

Test Rover Aids Preparations in California for Curiosity Rover on Mars

Final Checks of Aquarius Instrument

An Astronomer's Fantasy: Planets in the Lab

Mars rover Curiosity with Newly Installed Wheels

NASA's WISE Spacecraft Situated on Work Stand

Voyager 1 Encounters Stagnation Region

Mars Reconnaissance Orbiter over Nilosyrtis

Test Scooping for Mars Rover Curiosity

JPL Testbed Image of Inflated Airbags

Proposed Mission for Studying Deep Interior of Mars (Artist Concept)

Bird's Eye View of Kepler-16 System (Artist Concept)

Detector for CheMin

Phoenix Mission Lander on Mars, Artist's Concept

Testing of Mars Landing Radar near Lancaster, Calif.

Hoisting NASA's Mars Science Laboratory Onto Its Atlas V

Close-up of Diviner Solar Calibration Target

Preparing Mars Science Laboratory Heat Shield

Curiosity's Sky Crane Maneuver, Artist's Concept

Potential Sources and Sinks of Methane on Mars

Illustrating MastCam Capabilities with a Terrestrial Scene

Mars Science Laboratory Spacecraft During Cruise, Artist's Concept

Curiosity at Work on Mars (Artist's Concept)

Artist’s Concept of the Orbiting Carbon Observatory

Protecting Juno's Electronics from Radiation

Planck Spacecraft (Artist Concept)

Simulating Titan-Like Smog

Juno Mission to Jupiter (2010 Artist's Concept)

How Phoenix Measures Wind Speed and Direction

Mars Rover Curiosity's Arm Held High

Preparing Juno for Environmental Testing

Curiosity Inside Aeroshell, Artist's Concept

Lifting SAM Instrument for Installation into Mars Rover

NASA Tests Future Mars Landing Technology

Viewing Spark Generated by ChemCam Laser for Mars Rover

Installing Electronics in Juno's Vault

NuSTAR Orbits Earth (Artist Concept)

Three Eclipsing Bodies (Artist Concept)