The blue star near the center of this image provided by NASA Monday Jan. 24, 2011 is Zeta Ophiuchi. When seen in visible light it appears as a relatively dim red star surrounded by other dim stars and no dust. However, in this infrared image taken with NASA’s Wide-field Infrared Survey Explorer, or WISE, a completely different view emerges. Zeta Ophiuchi is actually a very massive, hot, bright blue star plowing its way through a large cloud of interstellar dust and gas. (AP Photo/NASA)
This image provided by NASA shows the Aurora Borealis taken from the International Space Station taken by astronaut Douglas Wheelock. A solar array from the station can be seen at top. NASA will again attempt to launch Space Shuttle Discovery no earlier than Dec. 3 at about 2:52 a.m. EST. (AP Photo/NASA)
This black-and-white image of the comet Hartley 2 provided by NASA was sent from the NASA EPOXI Mission Deep Impact spacecraft, which passed within 435 miles (700 kilometers) of the comet at its closest point, and was received at Jet Propulsion Laboratory in Pasadena, California, Thursday, Nov. 4, 2010. The comet is estimated to be 1.4 miles (2.2 kilometers) long, and weigh about 280 million metric tons. (AP Photo NASA/JPL-Caltech/University of Maryland)
In this Aug. 4, 2010 picture provided by NASA, NASA astronaut Michael Barratt, STS-133 mission specialist, shakes hands with Robonaut 2 during a news conference in the Space Vehicle Mock-up Facility at NASA’s Johnson Space Center in Houston. Ron Diftler, NASA Robonaut project manager, is at left. Robonaut 2 is hitching a one-way ride to the International Space Station on the final flight of the space shuttle Discovery scheduled for Wednesday, Nov. 3, 2010. NASA hopes one day he will assist flesh-and-bone astronauts in orbit. (AP Photo/NASA, Lauren Harnett)
The crew of space shuttle Discovery, from left, commander Steve Lindsey, pilot Eric Boe, mission specialist’s Alvin Drew, Tim Kopra, Michael Barratt and Nicole Stott attend a news conference in front of the shuttle on launch pad 39A at the Kennedy Space Center in Cape Canaveral, Fla., Thursday, Oct. 14, 2010. Discovery is scheduled to launch Nov. 1. (AP Photo/John Raoux)
Photographers take photos of space shuttle Discovery at launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida, Tuesday, Sept. 21, 2010. Discovery is scheduled to launch on Nov. 1. (AP Photo/John Raoux)
This image provided by NASA Wednesday Sept. 1, 2010 shows sand dunes near the North pole of Mars where the landscape is dominated by sand dunes forming a massive erg (sand sea), much like parts of the Sahara Desert on Earth. In parts of the erg, sand is abundant and covers the entire surface. Here near the edge, sand is in shorter supply and the dunes are separated by areas of lighter-toned soil. The image was taken by the HiRISE camera on the Mars Reconnaissance Orbiter. (AP Photo/NASA)
This image provided by NASA shows Hurricane Earl taken by astronaut Douglas Wheelock aboard the International Space Station and posted Aug. 31, 2010. Earl was expected to remain over the open ocean before turning north and running parallel to the East Coast, bringing high winds and heavy rain to North Carolina’s Outer Banks by late Thursday or early Friday. (AP Photo/NASA)
In this x-ray photo provided by NASA, the sun is shown early in the morning of Sunday, Aug. 1, 2010. The dark arc near the top right edge of the image is a filament of plasma blasting off the surface — part of the coronal mass ejection. The bright region is an unassociated solar flare. When particles from the eruption reach Earth on the evening of Aug. 3-4, residents of northern regions — from Maine to Michigan and anywhere farther north around the globe — may see a brilliant auroral display known as the Northern Lights. Usually only regions closer to the Arctic can see the aurora of rippling reds and greens, but solar storms pull them south. (AP Photo/NASA)
The external fuel tank for the last scheduled space shuttle flight is transported to the Vehicle Assembly Building, back right, at the Kennedy Space Center in Cape Canaveral, Florida, Wednesday, July 14, 2010. The tank is designated for space shuttle Endeavour’s STS-134 mission scheduled to launch in Feb. 2011. (AP Photo/John Raoux)
This June 26, 2010 NASA’s Aqua satellite image shows Tropical Storm Alex hovering over Guatemala, Belize, and Honduras. Hurricane watches were in effect Monday, June 28, 2010 for a stretch of Gulf coast in southern Texas and northern Mexico as Tropical Storm Alex gained strength and appeared on track to become a Category 3 hurricane before it makes landfall later this week. Forecasters said the storm’s path could push oil from the massive Gulf oil spill farther inland. (AP Photo/NASA)
In this June 18, 2010 satellite image provided by NASA, oil from the Deepwater Horizon rig is visible on the surface of the Gulf of Mexico. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite took this picture. The oil appears as varying shades of white, as sunlight is reflected off its surface. (AP Photo/NASA)
In this photo provided by NASA, the Soyuz TMA-19 spacecraft is raised into vertical position at the launch pad of the Baikonur Cosmodrome in Kazakhstan, Sunday, June 13, 2010. The launch of the Soyuz spacecraft with Expedition 24 NASA Flight Engineers Shannon Walker and Doug Wheelock, and Russian Soyuz Commander Fyodor Yurchikhin is scheduled for Wednesday, June 16, 2010 at 3:35 a.m. Kazakhstan time. (AP Photo/NASA, Carla Cioffi)
