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)
In this photo taken Oct. 25, 2010, Yakutian horses gather at the Pleistocene Park, a 40,000 acre wilderness in northern Siberia, Russia, where Russian scientist Sergey Zimov is trying to recreate conditions from the end of the Ice Age. Zimov believes populating Siberia with grass-eating animals will regenerate grasslands, which are more effective at preventing the thaw of permafrost and slowing the emission of dangerous greenhouse gases. (AP Photo/Arthur Max)
This artist’s rendering provided by the European Southern Observatory shows a planet, appearing as a crescent at the lower-right of its parent star, HIP 13044, left. While some 500 planets have been identified in other parts of our galaxy — the Milky Way — none have been reported in other galaxies. Now this one has been discovered orbiting the star called HIP 13044, located about 2,000 light year away. While this star is now in the Milky Way, researchers reported in the Thursday, Nov. 18, 2010 online edition of the journal Science that it originated in a separate galaxy that was later cannibalized by ours. (AP Photo/European Southern Observatory)
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)
President Barack Obama’s speech to students attending the White House science fair is seen on a monitor in the East Room of the White House in Washington, Monday, Oct. 18, 2010, in Washington. Seated from right to left in front row are Mythbusters Jamie Hyneman and Adam Savage, Bill Nye the Science Guy, and Secretary of Energy Steven Chu. President Obama will appear on an episode of Mythbusters that will air on Dec. 8.
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)
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)
In this one hour exposure photo taken June 22, 2009 and provided by Steve Irvine, fireflies fly in front of his home in Big Bay, Ontario in Canada. A childhood rite of passage — catching fireflies in Mason jars and watching them glow — could be fading along with the dog days of summer. Scientists are busy analyzing a summer’s worth of observations of the mesmerizing insects collected by a network of backyard volunteers in hopes of verifying whether anecdotal evidence suggesting the luminous insects are on the decline is correct, and if so, what’s behind their shrinking populations. (AP Photo/Courtesy Steve Irvine)
This image provided by NOAA shows a close look one of the many interesting images collected by the Little Hercules ROV during the INDEX 2010 Exploration of the Sangihe Talaud Region off Indonesia in July. Scientists using cutting-edge technology to explore waters off Indonesia were wowed by colorful and diverse images of marine life on the ocean floor — including plate-sized sea spiders and flower-like sponges that appear to be carnivorous. They predicted Thursday Aug. 26, 2010 that as many as 40 new plant and animal species may have been discovered during the three-week expedition that ended Aug. 14. (AP Photo/NOAA Okeanos Explorer Program)
This artist’s impression made available by the European Southern Observatory Tuesday, Aug. 24, 2010, shows the remarkable planetary system around the Sun-like star HD 10180. Observations with the HARPS spectrograph, attached to ESO’s 3.6-metre telescope at La Silla, Chile, have revealed the definite presence of five planets and evidence for two more in orbit around this star. This system is similar to the Solar System in terms of number of planets and the presence of a regular pattern in the sizes of the orbits. If confirmed the closest planet detected would be the lightest yet known outside the Solar System, with a mass that could be only about 1.4 times that of the Earth. (AP Photo/ESO, L. Calcada)
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)
In this photo released by China’s Xinhua News Agency, the sun is covered by the moon during a solar eclipse, in Easter Island, Chile, Sunday, July 11, 2010. (AP Photo/Xinhua, Victor Rojas)

