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Hints:
Kepler
Cygnus
Lyra
Earth-like

Alan Boss: I think we're on the verge of finding out just how many Earth-like planets there are in the universe.

You're listening to astronomer Alan Boss. He's hoping to get more answers about Earth-like planets from NASA's Kepler Mission, launched in March of 2009. [---1---]

Alan Boss: [---2---] (hint:數(shù)字都寫阿拉伯?dāng)?shù)字)

Boss said the universe could be crowded with rocky planets like Earth - some possibly with water, and even life.

Alan Boss: [---3---] (hint:本句有個 - )

Boss bases his hunch on the fact that for nearby sun-like stars, about a third have turned up what are called 'super-Earths,' planets five to ten times more massive than Earth.

Alan Boss: [---4---]

[---5---] His new book is called The Crowded Universe.

I'm Jorge Salazar. E&S is a clear voice for science.

【視聽版科學(xué)小組榮譽(yù)出品】
Boss said Kepler is like a big digital camera attached to a telescope in space. It will be staring at 100,000 stars in the field of the constellations Cygnus and Lyra for roughly 3.5 years looking for the periodic dimmings of those stars that are caused by Earth-like planets. There are already clear indications that such Earth-like planets are going to be quite common - that is, Earth-like planets probably occur around essentially every solar-type star, or very close to that. We're probably going to find just hordes and hordes of more normal, terrestrial Earth-like planets. As we look up into the night sky, said Boss, nearly every star we see might have an Earth-like world, 100 billion in our galaxy alone.