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Wednesday, April 4, 2012

COULD ANCIENT ALIENS LIVE ON METHUSELAH PLANETS?

Ancient-world

The announcement of a pair of planets orbiting a 12.5 billion-year old star flies in the face of conventional wisdom that the earliest stars to be born in the Universe shouldn't possess planets at all.

12.5 billion years ago, the primeval universe was just beginning to make heavier elements beyond hydrogen and helium, in the fusion furnace cores of the first stars. It follows that there was very little if any material for fabricating terrestrial worlds or the rocky seed cores of gas giant planets.

This argument has been used to automatically rule out the ancient and majestic globular star clusters that orbit our galaxy as intriguing homes for extraterrestrials.

The star that was announced to have two planets is not in a globular cluster (it lives inside the Milky Way, although it was most likely a part of a globular cluster that was cannibalized by our galaxy), but it is similarly anemic as the globular cluster stars because it is so old.

This discovery dovetails nicely with last year's announcement of carbon found in a distant, ancient radio galaxy. These findings both suggest that there were enough heavy elements in the early universe to make planets around stars, and therefore life.

Read More: http://news.discovery.com/space/could-ancient-aliens-live-on-methuselah-planets-120304.html

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