21–40 of 205 results

Galaxies

Why Are Two Ghost Galaxies Missing Dark Matter?

Ultra-diffuse galaxies are usually dark matter-rich. But astronomers have discovered two of these galaxies that lack dark matter altogether.

Cigar Galaxy's Galactic Superwind

Galaxies

Tracing the Cigar Galaxy's Superwind

NASA’s SOFIA airborne observatory has returned a striking far-infrared view of the Cigar Galaxy and its “galactic superwind.”

Galaxy cluster Abell 1314

Galaxies

Radio Survey Maps Hundreds of Thousands of New Galaxies

The LOFAR survey, based in The Netherlands, has released a bonanza of new sources. And with only 2% of the sky covered so far, this is only the beginning.

Spherex

Spacecraft and Space Missions

NASA to Explore Early Universe, Origins of Life with SPHEREX

The SPHEREX mission will create multiple surveys of the near-infrared sky that will reveal the origins of life and perhaps the universe itself.

Rotation of Andromeda Galaxy

Galaxies

New Study Pushes Back Milky Way’s Dust-up with Andromeda

By tracing stars in other galaxies, the Gaia satellite has helped astronomers understand the relative motions of the Milky Way's galactic siblings.

Image of Small Magellanic Cloud

Galaxies

Evidence Mounts for a Magellanic Collision

Astronomers have suspected for some time that the Large and Small Magellanic Clouds collided in the recent past. The Gaia space telescope provides striking new evidence for a head-on collision.

Milky Way ancient merger

Galaxies

Ancient Merger Wreckage in the Milky Way

Mounting evidence indicates that our galaxy smashed up another smaller galaxy roughly 10 billion years ago.

Galaxies

How to Turn Off a Galaxy’s Star Formation

New observations by the Atacama Large Millimeter/submillimeter Array (ALMA) provide a close look at a galaxy that may be in the process of shutting down its star formation.

Magellanic Clouds

Galaxies

The Magellanic Clouds Might Once Have Been a Trio

The Milky Way's two largest companion galaxies may have once been a threesome — but new data from the Gaia satellite leaves the satellites' history an open question.

BUFFALO image of Abell 370

Galaxies

60-Second Astro News: Starbirth, Stardeath, and the Evolution of Galaxies

Starbirth and stardeath light up a nearby galaxy while faraway galaxies twist and bend in these new images from NASA's Hubble and Chandra space observatories.

Galaxies

Andromeda Collided with Galactic Sibling Billions of Years Ago

A new study says our neighbor galaxy’s big stellar halo and stellar evolution are due to a major collision that ended 2 billion years ago.

Galaxies

Disentangling the History of the Magellanic Clouds

The Magellanic Clouds — two nearby dwarf galaxies easily visible to the naked eye in the southern hemisphere — are key to understanding the dynamics and evolution of the Local Group of galaxies. Can an in-depth look at these galaxies’ outer regions help us make sense of their complicated interaction history?

conceptual image of a black hole

Black Holes

Do Big Black Holes Wander the Galaxy?

New simulation work suggests that galaxies like the Milky Way could be home to a dozen supermassive black holes.

Artist's rendition of protocluster SPT 2349-56

Galaxies

14 Galaxies Might Become Universe’s Most Massive Structure

At least 14 galaxies are swarming in the early universe, forming a protocluster with the mass of 10 trillion Suns. It might become one of the most massive structures in the universe.

Stellar Science

Globular Clusters Shine in a Galaxy Lacking Dark Matter

You may have seen recent news about NGC 1052–DF2, a galaxy that was discovered to have little or no dark matter. Now, a new study explores what NGC 1052–DF2 does have: an enigmatic population of unusually large and luminous globular clusters.

galaxy without dark matter

Galaxies

A Galaxy Without (Much) Dark Matter

Astronomers have found a peculiar object: a fluffy galaxy that has little to no dark matter.

Galaxies

Hubble’s View of Little Blue Dots

The recent discovery of a new type of tiny, star-forming galaxy is the latest in a zoo of detections shedding light on our early universe. What can we learn from the unique “little blue dots” found in archival Hubble data?

Centaurus A

Galaxies

Orderly Dwarf Galaxies Challenge Cosmological Wisdom

Most of the dwarf galaxies around Centaurus A appear to be orbiting the giant galaxy along a single plane — a result not predicted by current cosmological models.

Galaxies

Galaxies Show Order in Chaotic Young Universe

New observations of galaxies in a universe just 800 million years old show that they’ve already settled into rotating disks. They must have evolved quickly to display such surprising maturity.

Sculptor dwarf galaxy

Cosmology

Stars Map Dark Matter in Dwarf Galaxy

A combo of Hubble and Gaia data reveal the distribution of dark matter in a tiny galaxy by tracking the galaxy’s stars.

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