galaxies – आवारा मुसाफिर

Scientists have spotted the farthest Galaxy ever

April 7, 2022270 Views

Offers clues about the primordial universe An international team of astronomers, including researchers at the Center for Astrophysics | Harvard & Smithsonian, has spotted the most distant astronomical object ever: a galaxy. Named HD1, the galaxy candidate is some 13.5 billion light-years away and is described in the Astrophysical Journal. In an accompanying paper published in the Monthly Notices of the Royal Astronomical Society Letters, scientists have begun to speculate exactly what the galaxy is. The team proposes two ideas: HD1 may be forming stars at an astounding rate and is possibly even home to Population III stars, the universe’s very first stars — which, until now, have never been observed. Alternatively, HD1 may contain a supermassive black hole about 100 million t...

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Stellar ‘vampire’ finds love at first bite with companion star

AWARA MUSAFIR BUREAU

March 3, 2022790 Views

“Closest black hole” system found to contain no black hole Astronomers have gotten a good look at what happens when a "vampire" star sucks the outer layers of material from a companion star, stripping this "bitten" victim down to a mere stellar core. In 2020 a team led by European Southern Observatory (ESO) astronomers reported the closest black hole to Earth, located just 1000 light-years away in the HR 6819 system. But the results of their study were contested by other researchers, including by an international team based at KU Leuven, Belgium. In a paper published on Wednesday, these two teams have united to report that there is in fact no black hole in HR 6819, which is instead a “vampire” two-star system in a rare and short-lived stage of its evolution. The original study on...

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Capturing All That Glitters in Galaxies with NASA’s Webb

AWARA MUSAFIR BUREAU

January 22, 2022326 Views

An international research team will survey the stars, star clusters, and dust that lie within 19 nearby galaxies Spirals are some of the most captivating shapes in the universe. They appear in intricate seashells, carefully constructed spider webs, and even in the curls of ocean waves. Spirals on cosmic scales – as seen in galaxies – are even more arresting, not only for their beauty, but also for the overwhelming amount of information they contain. How do stars and star clusters form? Until recently, a complete answer used to lie out of reach, blocked by gas and dust. Within the first year of operations, NASA’s James Webb Space Telescope will help researchers complete a more detailed sketch of the stellar life cycle with high-resolution infrared-light images of 19 galaxies. FILE PH...