When galaxies collide | EurekAlert! Science News

It was previously thought that collisions between galaxies would necessarily add to the activity of the massive black holes at their centers. However, researchers have performed the most accurate simulations of a range of collision scenarios and have found that some collisions can reduce the activity of their central black holes. The reason is that […]

The seven rocky planets of TRAPPIST-1 seem to have very similar compositions

IMAGE: This illustration shows three possible interiors of the seven rocky exoplanets in the TRAPPIST-1 system, based on precision measurements of the planet densities. Overall the TRAPPIST-1 worlds have remarkably… view more  Credit: NASA/JPL-Caltech A new international study led by astrophysicist Eric Agol from the University of Washington has measured the densities of the seven planets […]

Record-breaking laser link could help us test whether Einstein was right

IMAGE: UWA’s rooftop observatory. view more  Credit: ICRAR Scientists from the International Centre for Radio Astronomy Research (ICRAR) and The University of Western Australia (UWA) have set a world record for the most stable transmission of a laser signal through the atmosphere. In a study published today in the journal Nature Communications, Australian researchers teamed up with researchers […]

Study: X-Rays surrounding ‘Magnificent 7’ may be traces of sought-after particle

IMAGE: An artistic rendering of the XMM-Newton (X-ray multi-mirror mission) space telescope. A study of archival data from the XMM-Newton and the Chandra X-ray space telescopes found evidence of high levels… view more  Credit: D. Ducros; ESA/XMM-Newton, CC BY-SA 3.0 IGO A new study, led by a theoretical physicist at the U.S. Department of Energy’s Lawrence […]

Galaxies hit single, doubles, and triple (growing black holes)

IMAGE: This pair of objects comes from a study of seven triple galaxy mergers. By using Chandra and other telescopes, astronomers determined what happened to the supermassive black holes at the centers of… view more  Credit: X-ray: NASA/CXC/Univ. of Michigan/A. Foord et al.; Optical: SDSS & NASA/STScI When three galaxies collide, what happens to the huge […]

Giant 2D atlas of the universe helps dark energy spectroscopic survey

IMAGE: Sky distribution of the latest DESI imaging data release from the website of the DESI imaging legacy surveys. The enlarged image is part of the sky showing the DESI spectroscopic… view more  Credit: DESI website The Beijing-Arizona Sky Survey (BASS) team of National Astronomical Observatories of Chinese Academy of Sciences (NAOC) and their collaborators of […]

Scientists complete yearlong pulsar timing study after reviving dormant radio telescopes

While the scientific community grapples with the loss of the Arecibo radio telescope, astronomers who recently revived a long-dormant radio telescope array in Argentina hope it can help modestly compensate for the work Arecibo did in pulsar timing. Last year, scientists at Rochester Institute of Technology and the Instituto Argentino de Radioastronomi­a (IAR) began a […]

Compressive fluctuations heat ions in space plasma

IMAGE: Artist’s impression of the ions and electrons in various space plasmas. view more  Credit: Yohei Kawazura New simulations carried out in part on the ATERUI II supercomputer in Japan have found that the reason ions exist at higher temperatures than electrons in space plasma is because they are better able to absorb energy from compressive […]

Why losing Arecibo is a big deal for astronomy

Edgard Rivera-Valentín first visited the Arecibo Observatory as a little kid. “I definitely remember this feeling of just being awestruck,” Rivera-Valentín says. “Looking at this gigantic telescope … getting to hear about all this neat work that was being done … it definitely leaves an impression.” Important science was happening right in the backyard of […]

Scientists peer into the 3D structure of the Milky Way

Scientists from Cardiff University have helped produce a brand-new, three-dimensional survey of our galaxy, allowing them to peer into the inner structure and observe its star-forming processes in unprecedented detail. The large-scale survey, called SEDIGISM (Structure, Excitation and Dynamics of the Inner Galactic Interstellar Medium), has revealed a wide range of structures within the Milky […]