Abstracts » Science and technology

CO in the early universe clouds cosmologists' views

Article Abstract:

Researchers have found evidence of carbon monoxide in the universe when it was just a billion years old. Because the source of CO is thought to be the explosion of stars, its presence suggests that stars had already lived and died before the time most cosmologists believe that galaxy formation was underway.

Galaxies, Galactic evolution, Carbon monoxide

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To learn the universe's fate, observers clock its slowdown

Article Abstract:

Cosmologists hope that determining the 'deceleration parameter,' a measure of how fast gravity is slowing the universe's expansion, will help them discover whether the universe will expand forever or eventually collapse. Techniques astronomers are using to determine the number are discussed.

Expanding universe, Astronomical constants

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Clouds gather over deuterium sighting

Article Abstract:

Astronomer Craig Hogan concluded that high deuterium levels measured in a gas cloud were not valid when subsequent data on the same cloud failed to support the high deuterium finding. However, some astronomers dispute the second measurement.

Measurement, Observations, Deuterium, Interstellar matter, Interstellar medium

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