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SMA News and Events: 2015
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SMA News and Events: 2015
December 18, 2015
The Skeleton of the Milky Way
Science Update
Our home galaxy, the Milky Way, is a typical barred spiral galaxy, a flattened disk of about a hundred billion stars, gas, and dust that is roughly one hundred thousand light-years in diameter.
June 26, 2015
The Discovery of the Molecule Si-C-Si in Space
Science Update
The space between stars is not empty -- it contains a vast reservoir of diffuse material with about 5-10% of the total mass of our Milky Way galaxy. Most of the material is gas, but about 1% of this mass (quite a lot in astronomical terms) takes the form of tiny dust grains made predominantly of silicates (sand is also silicates), although grains can also be composed of carbon and other elements.
June 12, 2015
The Physical Properties of Dense Molecular Clouds
Science Update
Small, dense interstellar clouds of gas and dust, containing hundreds to thousands of solar-masses of material, are suspected of being the precursors to stars and stellar clusters.
June 8, 2015
Black Hole Hunters
News Release: www.nytimes.com
Aiming to make the first portrait of the hungry monster at the center of our galaxy, astronomers built "a telescope as big as the world."
May 1, 2015
An Improved Model for Star Formation
Science Update
Star formation, once thought to consist essentially of just the simple coalescence of material by gravity, actually occurs in a complex series of stages.
April 10, 2015
Merging Stars
Science Update
Astronomers have known for decades that the merger of two normal stars is a frequent and astronomically important phenomenon.
March 30, 2015
As Stars Form, Magnetic Fields Influence Regions Big and Small
News Release
Stars form when gravity pulls together material within giant clouds of gas and dust. But gravity isn't the only force at work. Both turbulence and magnetic fields battle gravity, either by stirring things up or by channeling and restricting gas flows, respectively. New research focusing on magnetic fields shows that they influence star formation on a variety of scales, from hundreds of light-years down to a fraction of a light-year.
March 27, 2015An Efficient Star Making Galaxy
Science Update
New stars regularly appear in the night sky as the gas and dust in giant interstellar clouds gradually coalesce under the influence of gravity.
February 13, 2015
Embryos of Stars
Science Update
Stars like the Sun begin their lives as cold, dense cores of dust and gas that gradually collapse under the influence of gravity until nuclear fusion is ignited.
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