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Latest Planetary defense Stories

Sentinel Telescope May Help Save Us From Earth-Killing Asteroids
2014-04-23 08:04:10

Asteroid impacts on Earth – those on the scale of the one that wiped out the dinosaurs 65 million years ago – have been big hits in Hollywood. But in the modern world, are the impacts portrayed in movies like Deep Impact and Armageddon only the stuff of science fiction?

2014-03-25 16:20:46

WASHINGTON, March 25, 2014 /PRNewswire-USNewswire/ -- Media are invited to attend the agency's Asteroid Initiative Opportunities Forum on Wednesday, March 26, at NASA Headquarters in Washington

2014-03-10 12:20:15

WASHINGTON, March 10, 2014 /PRNewswire-USNewswire/ -- NASA's Asteroid Data Hunter contest series will offer $35,000 in awards over the next six months to citizen scientists who develop improved

Small Asteroid Will Safely Pass Earth
2014-03-06 12:52:56

An asteroid about 25 feet (8 meters) across will safely pass Earth at about 1:21 p.m. PST (4:21 p.m. EST) today, March 6, approaching us six times closer than the moon.

Large Asteroid Set To Pass Between Earth And Moon
2014-03-04 14:50:08

An asteroid with a diameter about the size of an 80-story building is sweeping by Earth and the moon on Wednesday. First discovered on February 11, this asteroid has been viewed over 230 times...

Comet Find Is NEOWISE's First Since Activation
2014-03-01 06:14:41

NASA's Near-Earth Object Wide-field Infrared Survey Explorer spacecraft has spotted a never-before-seen comet - its first such discovery since coming out of hibernation late last year.

asteroid caught on film
2014-02-26 12:18:53

A collage of radar images of near-Earth asteroid 2006 DP14 was generated by NASA scientists using the 230-foot (70-meter) Deep Space Network antenna at Goldstone, Calif., on the night of Feb. 11, 2014.

astronaut retrieving a sample from the captured asteroid
2014-02-25 07:06:06

As the next step in advancing NASA’s asteroid initiative, the agency will host an Opportunities Forum March 26 at NASA Headquarters in Washington.

2014-02-24 12:20:33

WASHINGTON, Feb.

Large Asteroid Passes Within A Few Million Miles Of Earth
2014-02-18 11:05:41

The Earth faced a “close-call” on Monday night as near-Earth asteroid 2000 EM26 came within a couple million miles of the planet, nearly a year after the Chelyabinsk meteor slammed into Russia.


Latest Planetary defense Reference Libraries

3_973757bf6370bb40a6fd131d38ec6bb12
2004-10-19 04:45:40

Near-Earth Object -- Near-Earth Objects (NEO) are asteroids, comets and large meteoroids whose orbit intersects Earth's orbit and which may therefore pose a collision danger. Due to their size and proximity, NEO's are also more easily accessible for spacecraft from Earth and are important for future scientific investigation and commercial development. In fact, some near-Earth asteroids can be reached with much less ΔV (change in velocity) than the Moon. In the United States, NASA...

3_8254e27b9fccec1aaab3b9785e39d79f2
2004-10-19 04:45:40

Near-Earth Asteroid -- Near-Earth asteroids (NEAs) are asteroids whose orbit intersects Earth's orbit and which may therefore pose a collision danger, as well as being most easily accessible for spacecraft from Earth. In fact, some near-Earth asteroids can be reached with much less ΔV than the Moon. The most famous near-Earth asteroid is 433 Eros that was visited by NASA's Near Earth Asteroid Rendezvous probe. A few hundred such near-Earth asteroids are known, ranging in size up...

3_24d9d2ae65287658880cc277c0b4ea022
2004-10-19 04:45:40

433 Eros -- The asteroid 433 Eros was named after the Greek god of love Eros. It is an S-type asteroid approximately 13 x 13 x 33 km in size, the second-largest near-Earth asteroid. It was visited by the NEAR Shoemaker probe, which first orbited it taking extensive photographs of its surface and then in 2001 at the end of its mission was landed on the asteroid's surface using only its maneuvering jets. Depending on where they stood on Eros, a person who weighed 200 pounds (90...

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Word of the Day
aphotic
  • Having no light.
  • Of or relating to the region of a body of water that is not reached by sunlight and in which photosynthesis is unable to occur.
The word 'aphotic' comes from Greek roots meaning 'without' and 'light'.
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