VLA

An artist's impression of the exoplanet K2-18b, a world larger than Earth orbiting a red dwarf and being studied in search of possible signs of life or technological signatures.

K2-18b Scanned for Alien Signals – But No Technological Signature Found

  • 2 תגובות
SETI researchers used the VLA and MeerKAT telescope to search for narrow radio signals from the intriguing exoplanet. None survived the noise filters, but the method will be used in future searches
Supernova. Illustration: depositphotos.com

Radio signals reveal star's final years before violent supernova

  • No comments
Monitoring lasting about 18 months showed that the star emitted helium-rich gas in the last years of its life; the data hint at a binary system and a new “window” for studying stellar deaths via radio
Caption: Artist's illustration of two supermassive black holes (MBHs) within a galaxy. A tidal disruption event occurs around the supermassive black hole off the center of the galaxy, and material from a disintegrated star swirls into a bright accretion disk, which releases an energetic jet and produces two bright radio bursts. Credit: NSF/AUI/NSF NRAO/P. Vosteen.

Star-bursting by a black hole rarely occurs outside the center of the galaxy

  • 2 תגובות
Ammonia gas falls into an adsorption disk and feeds HW2 in Capouse A. Credit: NSF/AUI/NSF NRAO/B. Saxton

Astronomers Document "Cosmic Feast": Massive Star Devours Gas at Record Speed

  • No comments
New observations using the VLA radio array reveal how a protostar called HW2 Bacpheus A is absorbing ammonia gas from a rotating disk at a rare rate – providing a rare glimpse into the process of massive star formation.
WEAVE data are superimposed on an image from the Stephen Quintet's James Webb Space Telescope, with green contours showing data from the LOFAR radio telescope. The orange and blue colors follow the hydrogen-alpha luminosity measured by WEAVE LIFU, which shows where the intergalactic gas is ionizing. The hexagon marks WEAVE's observational coverage, 36 kilofarsecs wide (similar to the width of the Milky Way). Credit: University of Hertfordshire.

A galactic collision at a speed of 3.2 million km/h has been documented in great detail

  • One response
The dramatic event took place in the Stefan Quintet group, a galactic group that has been studied for nearly 150 years. The collision created a powerful shock wave, described as "like the supersonic boom of a fighter jet," one of the most impressive energetic processes
Science website logo
SEARCH