President Obama Phones Mars Rover Team

Juno Above Jupiter's Pole (Artist's Concept)

Mars Rover Curiosity's Arm Held High

Deep Space 1's Ion Engine

Parachuting to Mars

Airborne Testing for Mars Landing Radar by Dryden F/A-18

Test at NASA Dryden of Radar System for Next Mars Landing

FINESSE -- A Proposed Exoplanet Mission (Artist Concept)

Deep Space 1's Ion Engine

Tracks 'Seam' Like Airbags

3-D Anaglyph Fish-eye View of NASA's Curiosity Rover and its Rocket-Powered Descent Vehicle

Sample Analysis at Mars Instrument, Side Panels Off

Simulated Imaging of Phoenix Landing Site

Illustrating MastCam Capabilities with a Terrestrial Scene

Mars Descent Imager for Curiosity

Curiosity While on Parachute, Artist's Concept

NASA's Salt-Seeking Instrument Gets a Silvery Blanket

Mars Reconnaissance Orbiter over Pole

Microscopes for NASA's Phoenix Mars Lander

Mars Exploration Rover, Vertical

The Universe, Summed Up in a Squiggly Line

Hoisting NASA's Mars Science Laboratory Onto Its Atlas V

Volatiles on Mars

WISE Arrives at Vandenberg Air Force Base

Three Generations of Rovers with Standing Engineers

A Look Inside WISE

Lifting SAM Instrument for Installation into Mars Rover

Galaxy Feeds Off Gas (Artist Concept)

Rotating Curiosity's Back Shell Powered Descent Vehicle

An Astronomer's Fantasy: Planets in the Lab

Phoenix Without its Parachute

Graphene in Space

Aquarius at JPL

Black Hole Erupts

Viewing Spark Generated by ChemCam Laser for Mars Rover

Testing the Robotic Arm Rasp on Earth

Wheel Installation

Webb Instrument Inside Test Chamber

Curiosity at Center of Attention During Test

Tilt-Table Testing for Curiosity's Robotic Arm

NASA's Juno Spacecraft Awaits Launch

Mars Exploration Rover Makes Progress

Arm and Mast of NASA Mars Rover Curiosity

Off-Earth Driving Champs (in Miles)

Hale Telescope, Palomar Observatory

Laying the Groundwork for a Rover Test

Zeroing in on Mars

Earth Site Corresponding to Phoenix Mars Lander's Targeted Site

Testing Phoenix Mars Lander Parachute in Idaho

Test Model of Mars Landing Radar

MAVEN at Mars, Artist's Concept