With a main mirror about 60 inches wide, the new telescope on Maui's Haleakala volcano peak is somewhat small when compared to the large 10-meter Keck telescopes atop the Hawaiian peak of Mauna Kea.
But the telescope's 1,400-megapixel camera is a digital giant, with 1.4 billion pixels spread across 40 centimeters to snap photos of the night sky automatically, night after night, to find potentially dangerous asteroids. A typical domestic digital camera may have 5 million pixels on a chip a few millimeters across, telescope officials said.
Although modest in size, this telescope is on the cutting edge of technology, said astronomer Nick Kaiser, who is leading the asteroid hunt, known as the Panoramic Survey Telescope & Rapid Response System (Pan-STARRS). It can image a patch of sky about 40 times the area of the full moon, much larger than any similar-sized telescope on Earth or in space.
The asteroid hunt actually began on May 13, when the new Pan-STARRS telescope PS1 started its space rock survey. That was when "the world became a slightly safer place," project officials said in a statement this week. (More asteroid photos.)
Now, the new telescope has been turned over to the PS1 Science Consortium, an international group of 10 institutions across the United States, Germany, Taiwan and the United Kingdom. The consortium includes the University of Hawaii at Manoa, which built the Pan-STARRS telescope.
The telescope is the prototype for the more ambitious P4 observatory, a telescope that would be four times more powerful than P1 and sit atop Hawaii's Mauna Kea. As it is, P1 is expected to map about 75 percent of the night sky during its initial asteroid search.
Over the next three years, the new telescope is expected to find 100,000 asteroids and determine which, if any, pose a collision threat to Earth, researchers said. The observatory should also catalog about 5 billion stars and 500 million galaxies, they added.
President Barack Obama has proposed a budget boost for NASA's asteroid-tracking program that would increase funding from $3.7 million in 2009 to $20.3 million in 2011.
Obama has also proposed sending astronauts to visit an asteroid by 2025 to gather data that could help astronomers find ways to deflect space rocks before they threaten Earth and its inhabitants.
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