NASA TOP STORY

This Week at NASA: Next Giant Leap Video in Story

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This Week at NASA: Next Giant Leap

It was 45 years ago that Neil Armstrong took the small step onto the surface of the moon that changed the course of history. The Apollo missions blazed a path for human exploration to the moon and today NASA is taking its Next Giant Leap to near-Earth asteroids, Mars and beyond. As we develop and test the new tools of 21st century spaceflight on the human path to Mars, we once again will change the course of history.


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Satellite Study Reveals Parched U.S. West Using Up Underground Water

© U.S. Bureau of Reclamation

Satellite Study Reveals Parched U.S. West Using Up Underground Water

A new study by NASA and University of California, Irvine, scientists finds more than 75 percent of the water loss in the drought-stricken Colorado River Basin since late 2004 came from underground resources. The extent of groundwater loss may pose a greater threat to the water supply of the western United States than previously thought.

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NASA's James Webb Space Telescope Sunshield Stacks Up to Test

NASA's James Webb Space Telescope Sunshield Stacks Up to Test

The Sunshield on NASA's James Webb Space Telescope is the largest part of the observatory--five layers of thin membrane that must unfurl reliably in space to precise tolerances. Last week, for the first time, engineers stacked and unfurled a full-sized test unit of the Sunshield and it worked perfectly.


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NASA Voyager Statement About Solar Wind Models

NASA Voyager Statement About Solar Wind Models

A paper recently published in the journal Geophysical Research Letters describes an alternate model for the interaction between the heliosphere -- a "bubble" around our planets and sun -- and the interstellar medium. It also proposes a test for whether Voyager 1 has, indeed, left the heliosphere.


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NASA's Fermi Space Telescope Finds A Transformer Pulsar

NASA's Fermi Space Telescope Finds A Transformer Pulsar Video in Story

In late June 2013, an exceptional binary containing a rapidly spinning neutron star underwent a dramatic change in behavior never before observed. The pulsar's radio beacon vanished, while at the same time the system brightened fivefold in gamma rays, the most powerful form of light, according to measurements by NASA's Fermi Gamma-ray Space Telescope.


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The X Factor: Behind the James Webb Space Telescope

The X Factor: Behind the James Webb Space Telescope Video in Story

The James Webb Space Telescope is being tested at a number of facilities, including some operated by NASA. One of these locations is in Huntsville, Alabama, at the Marshall Space Flight Center.


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NASA's Chandra X-ray Observatory Celebrates 15th Anniversary

NASA's Chandra X-ray Observatory Celebrates 15th Anniversary Video in Story

Fifteen years ago, NASA's Chandra X-ray Observatory was launched into space aboard the Space Shuttle Columbia. Since its deployment on July 23, 1999, Chandra has helped revolutionize our understanding of the universe through its unrivaled X-ray vision.


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VIDEO: NASA Renames Historic Facility in Honor of Neil Armstrong

VIDEO: NASA Renames Historic Facility in Honor of Neil Armstrong Video in Story

During a ceremony at Kennedy Space Center on Monday, July 21, NASA renamed the center's Operations and Checkout Building in honor of late astronaut Neil Armstrong, who passed away in 2012.


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This Week at NASA: Apollo 11 Yesterday, Next Giant Leap Tomorrow

This Week at NASA: Apollo 11 Yesterday, Next Giant Leap Tomorrow Video in Story

NASA is celebrating the 45th anniversary of the historic Apollo 11 mission to the moon. On July 20, 1969, Neil Armstrong and Buzz Aldrin, with crewmate Michael Collins manning the command service module from lunar orbit, became the first humans on the moon -- with Armstrong's historic first step onto the lunar surface becoming a symbolic giant leap for humanity.


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Video Archive: Looking Back at Apollo 11 45 Years Ago

Video Archive: Looking Back at Apollo 11 45 Years Ago Video in Story

NASA is marking the 45th anniversary of the first moon landing this month. Here in a series of videos from the archives are some of the events of that fateful mission.


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NASA Administrator Charles Bolden Apollo 11 45th Anniversary Message

NASA Administrator Charles Bolden Apollo 11 45th Anniversary Message Video in Story

NASA Administrator Charles Bolden conveys his thoughts on the Apollo 11 45th anniversary.


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This Week at NASA: Cygnus Launch, Aquarius, Mars and More

This Week at NASA: Cygnus Launch, Aquarius, Mars and More Video in Story

Orbital Sciences Corporation's Antares rocket and Cygnus cargo craft launched from Wallops Flight Facility on the Orbital-2 mission -- the company's second operational resupply mission to the International Space Station, under its Commercial Resupply Services contract with NASA.


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This Week at NASA: OCO-2 Launch, SLS and Saturn

This Week at NASA: OCO-2 Launch, SLS and Saturn Video in Story

NASA's Orbiting Carbon Observatory-2 mission is underway. Launched from California's Vandenberg Air Force Base, OCO-2 will help track our impact on the amount of carbon dioxide in the atmosphere and help us better understand the various human-made and natural sources of CO-2.


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Ocean on Saturn's Moon Titan Could be as Salty as the Dead Sea

Ocean on Saturn's Moon Titan Could be as Salty as the Dead Sea

Scientists analyzing data from NASA's Cassini mission have firm evidence the ocean inside Saturn's largest moon, Titan, might be as salty as the Earth's Dead Sea.


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Cassini Names Final Mission Phase Its 'Grand Finale'

Cassini Names Final Mission Phase Its 'Grand Finale'

With input from more than 2,000 members of the public, team members on NASA's Cassini mission to Saturn have chosen a name for the final phase of the mission: the Cassini Grand Finale.


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Dawn's Spacecraft Downward Spiral to Reveal New World Views

Dawn's Spacecraft Downward Spiral to Reveal New World Views

Deep in the main asteroid belt, between Mars and Jupiter, far from Earth, far from the sun, far now even from the giant protoplanet Vesta that it orbited for 14 months, Dawn flies with its sights set on dwarf planet Ceres.



More top stories from July.