November 4th, 2011
10:45 AM ET

#FollowFriday

Every Friday, @CNNLightYears will suggest interesting and exciting space and science Twitter accounts to follow.

Today, @CNNLightYears is giving a #FollowFriday to a couple Twitter accounts that tweet about asteroids.

An asteroid the size of an aircraft carrier is heading toward Earth and it will pass closer to our planet than the moon, according to NASA’s Near Earth Object Program. Near-Earth asteroid 2005 YU55 will pass the Earth at a distance of 201,700 miles on Tuesday, November 8. NASA says the passing is safe.

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Filed under: FollowFriday • Voices
October 28th, 2011
10:03 AM ET

#FollowFriday

Every Friday, @CNNLightYears will suggest interesting and exciting space and science Twitter accounts to follow.

Today, @CNNLightYears is giving a #FollowFriday to a few Twitter accounts that tweet about UFOs for this Halloween edition.
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October 21st, 2011
11:30 AM ET

#FollowFriday

Every Friday, @CNNLightYears will suggest interesting space and science Twitter accounts to follow.

Today, @CNNLightYears is giving a #FollowFriday to the German Aerospace Agency (DLR) as that pieces of the Roentgen Satellite (ROSAT), a retired German satellite, may hit Earth this weekend.
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NASA: One-third of gamma ray sources are complete mysteries
A map of gamma-ray emissions made by the Fermi Space Telescope. Nearly 600 of the sources are complete mysteries.
October 18th, 2011
12:54 PM ET

NASA: One-third of gamma ray sources are complete mysteries

The Fermi Space Telescope has detected 1,873 gamma ray sources in space, and nearly 600 are complete mysteries, NASA wrote today on its website.

NASA's Fermi team has recently released the second catalog of gamma ray sources from its satellite's Large Area Telescope and have no idea where nearly one-third of gamma rays originated.

"Fermi sees gamma rays coming from directions in the sky where there are no obvious objects likely to produce gamma rays," said David Thompson, Fermi deputy project scientist, of Goddard Space Flight Center in Maryland.
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Filed under: Discoveries • In Space • News
October 14th, 2011
09:46 AM ET

#FollowFriday

Every Friday, @CNNLightYears will suggest interesting and exciting space and science Twitter accounts to follow.

Today, @CNNLightYears is giving a #FollowFriday to some of our favorite science museums and centers. The best part about Twitter is that if you are too far to make the visit, you can always keep up with the latest news and exhibits wherever you are.

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October 7th, 2011
12:10 PM ET

#FollowFriday

Every Friday, @CNNLightYears will suggest interesting and exciting space and science Twitter accounts to follow.

Today, @CNNLightYears is giving a #FollowFriday to Twitter accounts you can follow if you are interested in becoming an astronaut, or if you want to keep up with the next class of astronauts. Earlier this week, @CNNLightYears wrote that NASA will open up the astronaut candidate selection process in November of this year.
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September 30th, 2011
10:15 AM ET

#FollowFriday

Every Friday, @CNNLightYears will suggest interesting and exciting space and science Twitter accounts to follow.

Today, @CNNLightYears is giving a #FollowFriday to a few Twitter accounts that tweet about astronomy, the scientific study of celestial objects, space, and the universe as a whole.

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UARS enters Earth's atmosphere over Pacific Ocean, NASA says
UARS re-entry
September 27th, 2011
04:11 PM ET

UARS enters Earth's atmosphere over Pacific Ocean, NASA says

A defunct satellite entered the Earth’s atmosphere over the Pacific Ocean at 12:00 a.m. EDT on Saturday, September 24, NASA said Tuesday in a statement.

The Joint Space Operations Center at Vandenberg Air Force Base in California determined NASA’s decommissioned Upper Atmosphere Research Satellite (UARS) entered the atmosphere at 14.1 degrees south latitude and 189.8 degrees east longitude over the Pacific Ocean.

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September 23rd, 2011
09:42 AM ET

#FollowFriday

Every Friday, @CNNLightYears will suggest interesting and exciting space and science Twitter accounts to follow.

Today, @CNNLightYears is giving a #FollowFriday to 5 space agencies and companies that are doing some amazing things in the world of spaceflight and exploration.
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September 19th, 2011
01:12 PM ET

Satellite expected to re-enter Earth's atmosphere Friday, NASA says

A NASA satellite is expected to re-enter Earth's atmosphere on or around  Friday, September 23, according to NASA officials on Monday.

Re-entry of NASA's Upper Atmosphere Research Satellite, or UARS, was originally expected in late September or early October 2011, almost six years after its mission was complete.

"As of Sept. 18, 2011, the orbit of UARS was 133 mi by 149 mi (215 km by 240 km). Re-entry is expected Sept. 23, plus or minus a day," NASA wrote Monday  in an update.

The satellite will break into pieces during re-entry, and not all of it will burn up in the atmosphere. The risk to public safety or property is extremely small, NASA says.

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