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Echo II, a Balloon Satellite
Echo II, a Balloon Satellite

Echo II is shown here undergoing a tensile stress test in a dirigible hanger at Weekesville, North Carolina. A dirigible…

Kepler-22b: Closer to Finding an Earth
Kepler-22b: Closer to Finding an Earth

This artist's conception illustrates Kepler-22b, a planet known to comfortably circle in the habitable zone of a sun-like star. It…

First Supernova Companion Star Found
First Supernova Companion Star Found

In 2004, an international team of astronomers had, for the first time, observed a stellar "survivor" emerge from a double…

Ways We Can Be Affected by Space Weather
Ways We Can Be Affected by Space Weather

So much of our modern technology is at risk from space weather, including satellites, communications and power grids.

Representation of Earth’s Invisible Magnetic Field
Representation of Earth’s Invisible Magnetic Field

Schematic illustration of the invisible magnetic field lines generated by the Earth, represented as a dipole magnet field.

Kepler-22b – Comfortably Circling within the Habitable Zone
Kepler-22b – Comfortably Circling within the Habitable Zone

This diagram compares our own solar system to Kepler-22, a star system containing the first "habitable zone" planet discovered by…

Apollo 17 Splashdown
Apollo 17 Splashdown

The Apollo 17 spacecraft, containing astronauts Eugene A. Cernan, Ronald E. Evans, and Harrison H. Schmitt, glided to a safe…

Wheels Installed On Curiosity
Wheels Installed On Curiosity

Originally taken in July 2010, this photo shows NASA engineers installing six wheels on the Curiosity rover. NASA's Mars Science…

Astronaut Tests SAFER Backpack
Astronaut Tests SAFER Backpack

Astronaut Mark Lee tests the new backpack called Simplified Aid for EVA Rescue (SAFER), a system designed for use in…

Young Stellar Grouping in Cygnus X
Young Stellar Grouping in Cygnus X

Cygnus X hosts many young stellar groupings. The combined outflows and ultraviolet radiation from the region's numerous massive stars have…