Schematic of Sample Analysis at Mars (SAM) Instrument

Liftoff of the Delta II Rocket

How Phoenix Talks to Earth

New Galaxy Quest Readies for Launch

Mars Science Laboratory Stacked Spacecraft

MAVEN at Mars, Artist's Concept

Curiosity's Robotic Arm Bent at Nearly a 90-degree Angle

Juno Taking Shape

Mars Science Laboratory Spacecraft During Cruise, Artist's Concept

Mars rover Curiosity with Newly Installed Wheels

GRAIL Flying in Formation (Artist's Concept)

Simulating Titan-Like Smog

GRAIL Artist's Rendition

Mars Interior (Artist Concept)

NASA's WISE Telescope

Preparing for Solar and Thermal Testing of Curiosity Mars Rover

Juno Emerges from Thermal-Vac Testing

Observing a Rover Pivot Test

Lowering Juno's Radiation Vault

Close-up of Diviner Solar Calibration Target

LEGO Figurines Aboard Juno

NASA Tests Future Mars Landing Technology

Potential Sources and Sinks of Methane on Mars

Curiosity Speaks Volumes

Cosmic Jets Coming at You

Calibration Target on Curiosity for Camera on Rover's Arm

Comparison of Curiosity Camera Fields of View

Mars Rover Curiosity, Left Side View

Parachuting to Mars

Installing Electronics in Juno's Vault

Kepler's Planetary Systems in Motion (Artist Concept)

Arm Stretch by Curiosity Mars Rover

Does this Vial Contain Organics?

Curiosity at Center of Attention During Test

Simulating a Submarine Hydrothermal Vent

Graphene in Space

Phoenix Soaks up the Sun

JPL Testbed Image of Inflated Airbags

Chemistry and Mineralogy Instrument Installed in Mars Rover

Mars Science Laboratory Aeroshell with Curiosity Inside

Sandbox Tracks from Rover Testing

Deep Space 1's Ion Engine

Preparing Mars Science Laboratory Heat Shield

Mars Rover Curiosity in Artist's Concept, Tall

Size of Kepler Planet Candidates

Juno at the Vertical Integration Facility

NASA's Salt-Seeking Instrument Gets a Silvery Blanket

Turning in the Testbed

Wheel Installation

Phoenix Extends its Legs

InSight, a Mars MIssion (Artist Concept)