Cosmic ray influences on star formation in galaxies

Cosmic ray influences on star formation in galaxies The triggering of star formation, and also its quenching, is regulated by young massive stars in galaxies which inject energy and momentum into the interstellar medium. Feedback from the supermassive black holes at galaxies’ nuclei plays a similarly important role. These processes drive the massive gas outflows […]

The Largest Rotating Objects in the Universe: Galactic Filaments Hundreds of Millions of Light-Years Long

The Largest Rotating Objects in the Universe: Galactic Filaments Hundreds of Millions of Light-Years Long We’ve known for a while about the large-scale structure of the Universe. Galaxies reside in filaments hundreds of millions of light-years long, on a backbone of dark matter. And, where those filaments meet, there are galaxy clusters. Between them are […]

Hubble data confirms galaxies lacking dark matter

Hubble data confirms galaxies lacking dark matter The most accurate distance measurement yet of ultra-diffuse galaxy (UDG) NGC1052-DF2 (DF2) confirms beyond any shadow of a doubt that it is lacking in dark matter. The newly measured distance of 22.1 +/-1.2 megaparsecs was obtained by an international team of researchers led by Zili Shen and Pieter […]

Study of young, chaotic star system reveals planet formation secrets

Study of young, chaotic star system reveals planet formation secrets A team of scientists using the Atacama Large Millimeter/submillimeter Array (ALMA) to study the young star Elias 2-27 have confirmed that gravitational instabilities play a key role in planet formation, and have for the first time directly measured the mass of protoplanetary disks using gas […]

The give and take of mega-flares from stars

The give and take of mega-flares from stars The long relationships between stars and the planets around them—including the Sun and the Earth—may be even more complex than previously thought. This is one conclusion of a new study involving thousands of stars using NASA’s Chandra X-ray Observatory. phys.org Go to Source

Catch New Galactic Nova Herculis 2021 in Hercules the Hero

Catch New Galactic Nova Herculis 2021 in Hercules the Hero Now’s the time to catch Nova Herculis 2021, before it fades from view. …And then, there were two. Fresh off of the eruption of Nova Cassiopeiae 2021 early this year, another galactic nova made itself known earlier this past weekend, as a ‘new star’ or […]

Mystery of Betelgeuse’s dip in brightness solved

Mystery of Betelgeuse’s dip in brightness solved When Betelgeuse, a bright orange star in the constellation of Orion, became visibly darker in late 2019 and early 2020, the astronomy community was puzzled. A team of astronomers have now published new images of the star’s surface, taken using the European Southern Observatory’s Very Large Telescope (ESO’s […]

Study investigates the behavior of magnetar SGR J1745–2900

Study investigates the behavior of magnetar SGR J1745–2900 Using NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR), Russian astronomers have investigated the behavior of a magnetar known as SGR J1745–2900 after its outburst in April 2013. Results of the study, published June 9 on arXiv.org, could be essential to better understand the nature of this magnetar. phys.org […]