Keck Telescope looks at the Big Bang. (The world's largest single-mirror telescope measured extragalactic deuterium thought to have been created during the birth of the universe) (Brief Article)

From: Science News | Date: May 28, 1994 | Copyright information

The largest single-mirror telescope in the world has revealed evidence that ordinary matter -- such as protons and neutrons -- makes up an even smaller fraction of the total mass of the universe than previously thought. Much more of the stuff that exerts a gravitational tug but can't be seen may consist of exotic material rather than dim planets and burned-out stars.

Using the 10-meter W.M. Keck Telescope atop Hawaii's Mauna Kea, four astronomers have for the first time measured the abundance outside our galaxy of deuterium, a rare form of hydrogen with an extra neutron. ...

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