141–160 of 238 results

Cosmology

Fermi Detects Cosmic Fog

An international team has used the disappearance of high-energy photons to narrow in on the origin of the light suffusing the cosmos.

Straying stars

Cosmology

Stray Stars Might Solve Infrared Puzzle

A new study suggests that lonesome stars in galaxies’ farthest outskirts contribute to a mysterious, blotchy glow that permeates the sky.

Galaxies

Hubble Goes Deep — eXtremely Deep

The Hubble Space Telescope's newest deep space image reveals 5,500 galaxies in a tiny, dark patch of sky in the constellation Fornax.

Cosmology

Universe is Still Missing its Lithium

New observations of the Small Magellanic Cloud have only heightened the mystery surrounding a decades-long cosmic conundrum: why does the universe have so much less lithium than astronomers think it should?

Jay Pasachoff and local Chinese students

People, Places, and Events

Science All Around at the IAU

Jay Pasachoff blogs about his experience at the second week of IAU's General Assembly in Beijing, taking in talks on everything from the age of the universe to the history of sunspots.

Spacecraft and Space Missions

WISE Detects Blazing Black Holes

Astronomers using data from the WISE all-sky infrared survey have discovered a new class of luminous galaxies in the distant universe. These objects are rare, super-duper bright, and yet totally invisible in visible light.

Galaxies

New Heavyweight Galaxy Cluster

Astronomers have discovered a supermassive galaxy cluster that both meets and challenges expectations for how clusters ought to behave.

Professional Telescopes

Fly Through a 3D Map of the Universe

A mind-boggling 1.5 million galaxies trace out the filaments, clusters, and voids in Sloan Digital Sky Survey's new 3D map of the universe.

Galaxies

Star-Shredder's Brief Pulse

A supermassive black hole spotted last year as it ripped a star apart and spat out a jet had another surprise up its sleeve: a short-lived X-ray heartbeat seen only once before from a galaxy’s central beast.

Cosmology

Dark-Matter Thread Revealed

Scientists have found a dark-matter filament, a strand of the cosmic web that connects clusters of galaxies. It's the first time an individual filament has been detected and is among our first observational glimpses of the universe’s largest structures.

Reionization

Cosmology

A Windy Early Universe

Winds in the early universe could make radio observations of the first stars and galaxies a little easier, says a new study published in Nature.

Stellar Science

The Universe’s Lost Lithium

Astronomers are still struggling with a 30-year-old mystery that puts modern cosmology in a head-to-head clash with stellar observations. A new study may make the problem even worse.

Stellar Science

Black Hole Eats Stripped Star

A closely-watched flare from a gargantuan black hole in a distant galaxy has revealed to astronomers not only the mass of the black hole that ate the snack but the type of star that met its end as the meal.

Cosmology

Cosmic Ray Origin Still Mysterious

Observations out of Antarctica support the idea that the most energetic of the superspeedy space particles raining down on Earth are not from gamma-ray bursts. The new result prolongs a long-standing mystery in astrophysics.

M3 globular cluster

Cosmology

Far-out Black Hole Hints

“Star cities” orbiting galaxies may reveal the mass of the gargantuan black hole hidden deep in the galaxy’s heart. The new relation could be more evidence for a large-scale black hole-galaxy link — or, it could mean one of the latest revolutions in astrophysics isn’t the full story.

Cosmology

Hubble Images Stir Up Dark Matter Debate

Dark matter in the "Train Wreck" galaxy cluster (Abell 520) appears to behave in unusual ways. Now, new Hubble images are heating up the debate.

Cosmology

Colorful Cluster Transformation

Astronomers have spotted a unique galaxy cluster at a surprisingly far distance from Earth. The close mixing of lively and “red-and-dead” galaxies suggests an important transitional period in galaxy cluster evolution — when star formation shuts off.

Cosmology

Distant Galaxies Hint at Exotic Physics

Observations of galaxies shooting high-powered jets from their cores suggest the existence of a hypothetical particle. While speculative, the results could mean that photons aren't as dependable as we envision them to be.

Galaxies

The Dwarfs are for the Dwarfs

Two teams of astronomers have independently announced the detection of a dwarf galaxy being eaten by another dwarf galaxy, NGC 4449. Seen in this image as a faint swipe of red stars, the satellite will probably be shredded after only a few orbits of its host, adding its stars to that galaxy's collection.

Cosmology

Galaxy in a Bucket

A tiny lab experiment could provide additional evidence for how galaxies come by their magnetic fields. The physics isn't new, but that's part of the allure.

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