astronomical

A groundbreaking map of 1.3 million quasars reveals the universe’s structure and expansion, utilizing data from the Gaia space telescope and aiding in the study of dark matter and cosmic evolution. Credit: NASA, ESA, CSA, Joseph Olmsted (STScI)The new map includes around 1.3 million quasars from across the visible universe and could help scientists better understand the properties of dark matter.Astronomers have charted the largest-ever volume of the universe with a new map of active supermassive black holes living at the…

A medieval astronomical instrument discovered entirely by accident has turned out to be a powerful record of cross-cultural scientific collaboration.The brass astrolabe dates back to 11th century Spain – but was subsequently engraved with annotations and amendments over the centuries, in multiple languages, as changing owners adapted and updated it for their own use.The object is, therefore, not just a rare artifact, but almost unique: a palimpsest that records changing ideas and needs of its users as the world and…

The latest atmospheric river megastorm inundating Southern California with precipitation and high winds — prompting evacuations from mudslides and causing widespread road flooding — brought eye-popping rain totals by Monday morning. Rainfall topped 10 inches in some areas of Los Angeles County in two days, easily surpassing the average amount recorded for the entire month of February, according to the National Weather Service. “And February is our wettest month,” said Ryan Kittell, a meteorologist with the National…

A number of celestial events are lined up for the shortest month of the year,…

Astronomers have detected pond-like ripples across the gaseous disk of an ancient galaxy.What caused the ripples, and what do they tell us about the distant galaxy's formation and evolution? And whatever happened, how has it affected the galaxy and its main job: forming stars?This discovery concerns the oldest known spiral galaxy. It's over 12 billion years old, and it's called BRI 1335-0417. As the oldest known spiral, it holds an important place in our study of how galaxies form and evolve.According to scientists, the…

The European Space Agency's Gaia mission has released a new focused data release, marking a significant contribution to astronomy, Universe Today reports. Gaia's primary mission is to precisely measure the positions, motions, and distances of over a billion stars, while also studying exoplanets. NASA says, “Gaia will detect and very accurately measure the motion of each star in its orbit around the center of the galaxy.” While it may not generate the stunning images like the NASA/ESA-run Hubble Space Telescope or the…

An artist’s composition of the Milky Way seen with a neutrino lens (blue). Credit: IceCube Collaboration/U.S. National Science Foundation (Lily Le & Shawn Johnson)/ESO (S. Brunier)For the first time, the IceCube Neutrino Observatory has created an image of the <span class="glossaryLink" aria-describedby="tt" data-cmtooltip="<div class=glossaryItemTitle>Milky Way</div><div class=glossaryItemBody>The Milky Way is the galaxy that contains our Solar System and is part of the…

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Photo: John Moore (Getty Images)First Full-Color Images From Webb Space TelescopeThe famous first image of a black hole just got two times sharper. A research team used artificial intelligence to dramatically improve upon its first image from 2019, which now shows the black hole at the center of the M87 galaxy as darker and bigger than the first image depicted.I’m an astronomer who studies and has written about cosmology, black holes and exoplanets. Astronomers have been using AI for decades. In fact, in 1990, astronomers…

Researchers at Caltech’s Department of Medical Engineering have made significant progress in medical imaging by using wavefront shaping inspired by astronomy. Wavefront shaping is a method used to correct optical distortion caused by the Earth’s atmosphere in astronomical imaging. Similar to the Earth’s atmosphere, biological tissue also scatters light, making microscopic images of blood vessels, nerves, and cancer cells appear distorted. Credit: CaltechCaltech researchers have advanced medical imaging by adapting…