101–120 of 241 results
dwarf galaxy DDO 68


Of Dwarf Galaxies and Voids

Living in voids might be tangentially responsible for three small galaxies’ recent flurries of starbirth.


Students Discover a Galactic Eye of Horus

Undergraduate students in Japan stumbled upon a rare lensing of two distinct background galaxies.


The Making of a “Frankenstein” Galaxy

Astronomers take a second look at UGC 1382 — previously considered a typical elliptical galaxy — and reassess everything they know about its size, age, and formation.

A Chandra/Hitomi view of Perseus Cluster


Doomed Hitomi Gazed at Galaxy Cluster

In its first — and final — month of flight, the Hitomi X-ray observatory measured the calm within the bubbling core of the Perseus Cluster.

Simulated galaxy from FIRE cosmological simulation


Missing Dwarf Galaxies Never Were

Astronomers may have solved the case of the Milky Way’s missing satellite galaxies. The solution? The galaxies never existed.

cosmic rain onto AGN

Black Holes

Clouds Rain Down on Black Hole

Astronomers have detected three cold gas clumps falling toward a galaxy's center — at odds with the prevailing idea for how black holes grow.


Galaxy Cluster Spotted in Early Universe

Astronomers discover a vast collection of young galaxies from the early universe.

galaxy merger


How Dead Galaxies Stay Dead

A galaxy in the midst of a merger isn’t forming stars, even though it could. Astronomers think the galaxy’s central black hole might be the reason why.

Gravitational Lens SDP.81


Dark Dwarf Galaxy Discovered

Astronomers using the ALMA array of radio dishes have detected a dwarf galaxy 4 billion light-years away by the pull of its dark matter.

Resolving the Cosmic Infrared Background


Hidden Galaxies Revealed

Astronomers studying the infrared glow that pervades the universe have pinned down its source: dusty, faint, and faraway galaxies.

super spiral and normal galaxies


Super Spiral Galaxies

Astronomers have identified 53 “super spirals” — spiral galaxies that are huge and incredibly luminous — as part of a project exploring archived observations.

Most Distant Galaxy, GN-z11


Hubble Finds Most Distant Galaxy Yet

Astronomers using the Hubble Space Telescope have measured a precise distance to a galaxy dwelling in the cosmic dawn.

local large-scale structure


Galaxies Hidden Behind the Milky Way

Astronomers have detected hundreds of galaxies lying hidden behind the Milky Way's disk, many of which belong to the so-called Great Attractor, or Norma Supercluster.

Smith Cloud and Milky Way


Giant Cloud Came from the Milky Way

The massive Smith Cloud falling toward our galaxy’s disk is likely from our galaxy, not a visitor.

Ripples in the Milky Way's Disk

Milky Way

A Galaxy Hit-and-Run

Ripples found in the Milky Way’s disk reveal our galaxy survived an ancient hit-and-run. Now, astronomers might have caught the culprit.

An artist's impression of a damped-lyman alpha system


Seeing Shadows of Ancient Galaxies

A new technique lets astronomers measure nearly invisible clouds of hydrogen gas from across the universe.

M87 galaxy

Stellar Science

Astronomers Take Galaxy’s Pulse

Astronomers have caught a giant elliptical galaxy “shimmering” as its stars pulsate.

Tarantula Nebula pulsars


Pulsars' Gamma Rays Highlight Mysteries

The Fermi Gamma-ray Space Telescope has discovered that almost all of the highest energy photons in the Large Magellanic Cloud come from two pulsars.

MACS0717 galaxy cluster


Small Galaxies Helped Light Up Universe

Hubble observations confirm that much of the light that broke up the early universe’s hydrogen came from the smallest galaxies.

Simulated Submillimeter Galaxy


Making the Brightest, Rarest Galaxies

Some of the universe’s most luminous galaxies are also the most mysterious. New simulations shed light on how these galaxies formed.