A Giant Surprise about Extrasolar Planets

Giant stars with planets often have smaller amounts of heavy elements than
the Sun, say astronomers in the United States and Germany. This trend is
surprising: it is opposite the one seen in planet-bearing main-sequence
stars and suggests stars more massive than the Sun may give birth to planets
in a different way.

The full story is at http://KenCroswell.com/AGiantSurprise.html .

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