Can Astronomers Use Radar to Spot a Cataclysmic Asteroid?

Scientists share their latest findings and the future of radar in planetary science and defense 

Photo by Jee Seymour.
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Astronomers Discover Most Massive Neutron Star—or Least Massive Black Hole

Green Bank Telescope helps MeerKAT uncover a mysterious object at the boundary between black holes and neutron stars

An artist’s impression of the system assuming that the massive companion star is a black hole. The brightest background star is its orbital companion, the radio pulsar PSR J0514-4002E. The two stars are separated by 8 million km and orbit each other every 7 days. Credit: Daniëlle Futselaar (artsource.nl)
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Massive Gas Clouds Escape Center of Milky Way

Green Bank Telescope Discovers Hundreds of Clouds Blasting into Interstellar Space

Artist’s conception of the clouds flowing out from the center of the Milky Way, entrained in a very hot wind that has accelerated them to velocities of many hundreds of kilometers per second.  Most of the clouds have been detected by the Green Bank Telescope through their radio emission from hydrogen, but a few (indicated in blue) are now known to contain molecular gas as well.  The clouds were blasted out of the Milky by processes associated with star formation or the central black hole. Credit NSF/GBO/P.Vosteen.
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Mystery of Star Formation Revealed by Hearts of Molecular Clouds

Data from the World’s Largest Radio Telescopes Holds Clues

Research on the far edge of galaxy M83 reveals unusual star formation in an extreme environment. This area, outlined in yellow, is shown in data from several different instruments. From left to right: optical image from CTIO, ultraviolet image from GALEX, HI 21cm image from VLA and GBT, and CO(3-2) image from ALMA. In this last image, the star-forming “hearts” of molecular clouds, circled with white, are shown.
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Astronomers Accidentally Discover Dark Primordial Galaxy

Could Be the Faintest Galaxy Found to Date

Artist depiction of hydrogen gas observed in galaxy J0613+52.  The colors indicate the likely rotation of the gas relative to the observer (red=away, blue=toward). This image was made using a starfield from STScI POSS-II with additional illustration by NSF/GBO/P.Vosteen.
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