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Artist concept of space weather showing an active Sun with flares and a CME in the upper right, the Earth in the lower right with types of technology affected by space weather to the lower left; satellites, airplanes, the ISS and ground-based electrical lines.

Heliophysics

Studying the Sun-Earth connection.

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Mars

Latest from NASA's spacecraft exploring the red planet.

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Cassini at Saturn

Unlocking the secrets of the ringed giant and its moons

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Science Mission Directorate

NASA uses orbiting observers and robotic landers to investigate the planets, moons, comets, and asteroids of our Solar System.

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Latest Features

Screen capture from simulation of ARTEMIS P1 spacecraft entering lunar orbit.

First ARTEMIS Spacecraft Successfully Enters Lunar ...

The first of the two ARTEMIS spacecraft entered lunar orbit this morning. ARTEMIS was the first mission to orbit the moon's Lagrangian points and ...

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In a dramatic example of occultation, a Saturn moon, Rhea, emerges after being occulted by the larger moon Titan.

Join NASA in Measuring an Asteroid

On Sunday, July 3, from 9 p.m. to midnight EDT, NASA astronomer Dr. Bill Cooke will be observing asteroid 52 Europa and answering your questions via ...

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Small Asteroid to Whip Past Earth on June 27, 2011

An asteroid designated 2011 MD will safely pass Earth in the early morning hours.

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More Features

New Animation Depicts Next Mars Rover in Action

A new, high-definition animation of NASA's Mars Science Laboratory mission combines real scenes of Mars with spacecraft events such as landing on Mars and drilling into rocks.
NASA to Host Launch Tweetup for Jupiter-Bound Mission

NASA will host a two-day launch Tweetup for 150 of its Twitter followers on Aug. 4-5 at the agency's Kennedy Space Center in Florida.
Juno Blanket Check

Juno undergoes testing prior to its August launch to Jupiter
Dawn Nears Start of Year-Long Stay at Giant Asteroid

NASA's Dawn spacecraft is on track to begin the first extended visit to a large asteroid.
NASA Mission Suggests Sun and Planets Constructed Differently

Researchers analyzing samples returned by NASA's 2004 Genesis mission have discovered that our sun and its inner planets may have formed differently than previously thought.

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News Releases

NASA Online Videos Provide New Approach To Teach Science To Public

06.28.11 - NASA's new video series offers the public a fast and fun way to learn about scientific discoveries and facts about Earth, the solar system and beyond.
NASA Will Host 150 People For Tweetup At Launch Of Jupiter-Bound Mission

06.24.11 - NASA will host a two-day launch Tweetup for 150 of its Twitter followers on Aug. 4 - 5 at the agency's Kennedy Space Center in Florida.
NASA Mars Rover Arrives In Florida After Cross-Country Flight

06.23.11 - NASA's next Mars rover has completed the journey from its California birthplace to Florida in preparation for launch this fall.
NASA Probe Nears Position for Year-Long Stay at Giant Asteroid

06.23.11 - NASA's Dawn spacecraft is on track to begin the first extended visit to a large asteroid.

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Latest Images

Spacecraft Preparations

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First TV Image of Mars

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Interactive Features

Image Gallery

Artist's concept of the Voyager spacecraft in space.

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Spirit: Mars Mission Complete

Artist's concept of a Mars Exploration Rover

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Podcasts

NASACast: Solar System

Audio and Video podcasts on NASA missions exploring our solar system.
NASACast: What's Up?

NASA's monthly guide to watching the night sky.