October 25th, 2011
11:39 AM ET

Northern Lights seen across U.S.

The Northern Lights were visible hundreds of miles farther south than they normally would be in the United States.


Filed under: In Space • Light up the screen
October 25th, 2011
10:16 AM ET

NEEMO 15

"NEEMO 15 Commander Shannon Walker (NASA) and fellow aquanaut David Saint-Jacques (Canadian Space Agency) use a small telescoping boom as a means of translating across a simulated asteroid surface. Each end of the small boom can be anchored to the surface by either magnets or tethers and the astronauts can traverse the surface by alternating anchor points. Various translation techniques are being tested during this 13-day NEEMO mission.

NEEMO, which stands for NASA Extreme Environment Mission Operations, is one facet of NASA's Analog and Field Testing Missions. As NASA plans to expand human spaceflight and robotic exploration beyond low Earth orbit, astronauts are being trained to meet these challenges. Future destinations may include the moon, near Earth asteroids and Mars and its moons.

To prepare for the challenge of exploring these destinations in space, NASA conducts missions here on Earth, in remote locations that have physical similarities to extreme space environments."

Source: NASA

Filed under: Light up the screen
October 24th, 2011
09:45 AM ET

Planets Under a Red Sun

"This artist's concept illustrates a young, red dwarf star surrounded by three planets. Such stars are dimmer and smaller than yellow stars like our sun, which makes them ideal targets for astronomers wishing to take images of planets outside our solar system, called exoplanets. NASA's Galaxy Evolution Explorer is helping to identify young, red dwarf stars that are close to us by detecting their ultraviolet light (stars give off a lot of ultraviolet light in their youth)."

Source: NASA

Filed under: Light up the screen
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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Filed under: FollowFriday • News • Voices
October 21st, 2011
10:14 AM ET

A First for NASA

"On Oct. 22, 1968, the Apollo 7 crew is welcomed aboard the USS Essex, the prime recovery ship for the mission. This was the first Apollo splashdown and, therefore, the first three person 'landing' for NASA.

Left to right, are astronauts Walter M. Schirra Jr., commander; Donn F. Eisele, command module pilot; and, Walter Cunningham, lunar module pilot. In left background is Dr. Donald E. Stullken, NASA Recovery Team Leader from the Manned Spacecraft Center's Landing and Recovery Division."

Source: NASA

Filed under: Light up the screen
What's the recipe for a planet?
Planets form within a "disk" of dust and gaseous material surrounding young stars, as shown in this NASA illustration.
October 20th, 2011
02:00 PM ET

What's the recipe for a planet?

A discovery announced Thursday by the European Space Agency's orbiting Herschel observatory may reveal more about what ingredients it takes to cook up a new planet.

When stars are formed, they often leave a so-called "planet-forming disk" - shaped kind of like a pizza pie - with the star located in its hot center.

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Filed under: Discoveries • In Space
October 19th, 2011
02:51 PM ET

Looks like magic: quantum levitation

It looks like something out of a magic show, where the magician is able to defy gravity and float or levitate an object in midair with no apparent explanation. Check out this really cool video which is not a Vegas show, but an example of something called quantum levitation:

It’s not magic at all, but a very cool demonstration from the Association of Science-Technology Centers. It’s a demo from Tel-Aviv University on what happens when a superconductor gets trapped in a magnetic field. What you’re witnessing is something similar to the Meissner Effect.

A disk of very thin sapphire, coated by a material called yttrium barium copper oxide (YBa2Cu3O7-x, to be exact) gets thrown into a bath of liquid nitrogen to bring it to negative 300 degrees Fahrenheit. This creates a superconductor, or an object that conducts electricity without resistance and no energy loss. (I wish my air conditioner could have pulled that off this summer).

A row of magnets is added, and the disc seems to float or be trapped by the magnetic field. The combination of magnetism and superconductivity create the levitation. According to the university’s website, the two fields "don’t like each other." The two fields repel each other, much like putting the opposite ends of a magnet together.

In this case, however, some of the magnetic field does penetrate though and creates something called a flux tube. These tubes move, and the superconductor tries to stop that so the conductor looks as if it is locked in midair.

Don't plan on jumping on the "quantum levitation train" to shorten your daily commute any time soon. Until scientists can figure out a way to have a superconductor at a temperature other than negative 300, the idea is not yet practical. Maybe someday... Stay tuned.

Why these blue stars should(n't) exist
A red giant transfers the mass of its outer envelope to a blue star.
October 19th, 2011
01:00 PM ET

Why these blue stars should(n't) exist

Blue stragglers are stars that are observed to be brighter and bluer than we Earthlings would expect, since these characteristics make the stars appear younger than they actually are.

No one's been able to pin down how blue stragglers form. But a group of scientists report a theory in this week's issue of the journal Nature based on new observations.

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Filed under: In Space • News
October 19th, 2011
12:56 PM ET

The Past, Powering the Future

"All six Pratt Whitney Rocketdyne space shuttle main engines from Endeavour's STS-134 and Atlantis' STS-135 missions sit in test cells inside the Engine Shop at NASA's Kennedy Space Center in Florida. For the first time, all 15 shuttle main engines are in the shop at the same time, being prepped for shipment to NASA's Stennis Space Center in Mississippi, where they are being repurposed for use on NASA's next generation heavy lift rocket, the Space Launch System."

Source: NASA

Filed under: Light up the screen
MIT researchers devise see-through-wall technology
October 19th, 2011
10:12 AM ET

MIT researchers devise see-through-wall technology

Through the use of microwaves, MIT researchers have devised technology to see through walls in real time.

The radar array system, created by Gregory Charvat and John Peabody at the university's Lincoln Laboratory, sends microwave signals that bounce off objects and ultimately return radar images to a screen. The waves can even penetrate concrete walls.

Charvat said Tuesday that the project has been in the works for a while.

“It originally started out as my dissertation, where I developed a very slow prototype,” he said. “When I moved to Lincoln Lab, I teamed up with another colleague (Peabody) who was working with technology used for imaging human tissue” in medical environments such as hospitals.

FULL STORY from CNN's This Just In

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Filed under: On Earth
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