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Astronomy Current Events and Astronomy News from Brightsurf

Astronomy Current Events and Astronomy News Events, Discoveries and Articles from Brightsurf

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Ancient galaxy megamergers

Wed, 25 Apr 18 00:05:30 -0700

The ALMA and APEX telescopes have peered deep into space -- back to the time when the universe was one tenth of its current age -- and witnessed the beginnings of gargantuan cosmic pileups: the impending collisions of young, starburst galaxies. Astronomers thought that these events occurred around three billion years after the Big Bang, so they were surprised when the new observations revealed them happening when the universe was only half that age!

Astronomers witness galaxy megamerger

Wed, 25 Apr 18 00:04:40 -0700

Using the Atacama Large Millimeter/submillimeter Array (ALMA), an international team of scientists has uncovered a startlingly dense concentration of 14 galaxies that are poised to merge, forming the core of what will eventually become a colossal galaxy cluster.

Milky Way's supermassive black hole may have 'unseen' siblings

Tue, 24 Apr 18 00:00:20 -0700

In a new study published in the Astrophysical Journal Letters, researchers from Yale, the University of Washington, Institut d'Astrophysique de Paris, and University College London predict that galaxies with a mass similar to the Milky Way should host several supermassive black holes.

Galaxies grow bigger and puffier as they age: New study

Mon, 23 Apr 18 00:09:10 -0700

A new international study involving the Australian National University and the University of Sydney has found that galaxies grow bigger and puffier as they age.

Face recognition for galaxies: Artificial intelligence brings new tools to astronomy

Mon, 23 Apr 18 00:08:20 -0700

A machine learning method called 'deep learning,' which has been widely used in face recognition and other image- and speech-recognition applications, has shown promise in helping astronomers analyze images of galaxies and understand how they form and evolve. In a new study, researchers used computer simulations of galaxy formation to train a deep learning algorithm, which then proved surprisingly good at analyzing images of galaxies from the Hubble Space Telescope.

Once upon a time, an exoplanet was discovered

Mon, 16 Apr 18 00:14:20 -0700

In recent history, a very important achievement was the discovery, in 1995, of 51 Pegasi b, the first extrasolar planet ever found around a normal star other than the Sun. In a paper published in EPJ H, Davide Cenadelli from the Aosta Valley Astronomical Observatory (Italy) interviews Michel Mayor from Geneva Observatory (Switzerland) about his personal recollections of discovering this exoplanet.

Circumbinary castaways: Short-period binary systems can eject orbiting worlds

Thu, 12 Apr 18 00:10:40 -0700

Planets orbiting 'short-period' binary stars, or stars locked in close orbital embrace, can be ejected off into space as a consequence of their host stars' evolution, according to new research from the University of Washington.

SPHERE reveals fascinating zoo of discs around young stars

Wed, 11 Apr 18 00:16:10 -0700

New images from the SPHERE instrument on ESO's Very Large Telescope are revealing the dusty discs surrounding nearby young stars in greater detail than previously achieved. They show a bizarre variety of shapes, sizes and structures, including the likely effects of planets still in the process of forming.

Outback radio telescope listens in on interstellar visitor

Tue, 10 Apr 18 00:16:10 -0700

A telescope in outback Australia has been used to listen to a mysterious cigar-shaped object that entered our Solar System late last year. When 'Oumuamua was first discovered, astronomers thought it was a comet or an asteroid from within the Solar System. But after studying its orbit and discovering its long, cylindrical shape, they realised 'Oumuamua was neither and had come from interstellar space.

The largest catalog ever published of very high energy gamma ray sources in the galaxy
The HESS international collaboration, to which CNRS and CEA contribute, has published the results of 15 years of gamma ray observations of the Milky Way. Its telescopes installed in Namibia have studied populations of pulsar wind nebulae and supernova remnants, as well as microquasars, never before detected in gamma rays. Fourteen articles, making up the largest ever set of scientific results in this field, are published on April 9, 2018, in a special issue of the journal Astronomy