More Planets Discovered

European astronomers have found 32 new planets outside our solar system, adding evidence to the theory that the universe has many places where life could develop.

Scientists using the European Southern Observatory telescope didn't find any planets quite the size of Earth or any that seemed habitable or even unusual. But their announcement increased the number of planets discovered outside the solar system to more than 400.

Astronomer Stephane Udry of the University of Geneva said the results support the theory that planet formation is common, especially around the most common types of stars.

"I'm pretty confident that there are Earth-like planets everywhere," Udry said in a Web-based news briefing from a conference in Portugal. "Nature doesn't like a vacuum. If there is space to put a planet there, there will be a planet there."

What astronomers said is especially exciting is that about 40 percent of sun-like stars have planets that are closer to being Earth-sized than the size of Jupiter. Jupiter's mass is more than 300 times that of Earth's.

Depending on definitions of the size of super-Earths, the discovery suggests that planets that have a mass similar to Earth's are "extraordinarily commonplace," said Alan Boss, an astronomer at the Carnegie Institution of Washington. He was not part of the European team. "The universe must indeed be crowded with habitable worlds."

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