141–160 of 205 results

Galaxies

The Mysterious Seven

Seven clouds of hydrogen dotting the space between two iconic galaxies might be crumbs from a past encounter or evidence for the elusive cosmic web theorized to fuel galaxy growth.

Galaxies

How to Build a Galaxy

The iconic disk galaxy is perhaps the most common type of galaxy in the universe. But how did these galaxies form their wide, thin skirts and fat, round centers?

Galaxies

The Most Distant Star Ever Seen?

Astronomers have detected what might be the farthest star ever spectroscopically observed. The bright object blazes in an unusual location, too, perhaps giving insight into star formation in unconventional environments.

Galaxies

Stellar Senior Citizen

Astronomers have confirmed that the star HD 140283 is nearly as old as the universe.

Galaxies

Culprit Pegged for Cosmic Rays

Astronomers working with the Fermi Gamma-ray Space Telescope say they might finally have the “smoking gun” they’ve needed to convict supernova remnants as the origin of energetic particles called cosmic rays.

Galaxies

Amateurs Help Hubble Unveil Spiral

Robert Gendler stitched together a stunning mosaic of spiral galaxy M106, filling in gaps in Hubble coverage with his own and Jay GaBany's ground-based observations.

Milky Way

Galactic Bubbles Spark Debate

New microwave and radio observations resurrect controversy over gigantic lobes seen ballooning from the Milky Way’s center.

distant galaxies seen by Hubble

Galaxies

Hubble Takes Galaxy Census

New observations by the Hubble Space Telescope reveal some of the earliest galaxies in the universe.

NGC 1277

Black Holes

A Big Black Hole in a Small Galactic Pond

A record-breaking black hole lurking at the center of a compact galaxy weighs about 17 billion Suns, a new study finds. Now astronomers are wondering: how did such a small galaxy come to harbor a leviathan?

Galaxies

Cosmic Web Weeds Dwarf Galaxies

Astronomers have discovered an unexpected explanation for why they can only find a small fraction of the satellite galaxies the Milky Way is supposed to have.

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.

galactic haze

Milky Way

Milky Way Blew Bubbles

A careful analysis of Planck observations shows that there really is a mysterious haze emanating from the Milky Way’s core, mission team members say.

Stellar Science

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?

Galaxies

Galaxy Family Portrait

The Hubble Space Telescope snapped a family portrait of a pair of galaxies in the nearby Virgo galaxy, where a huge elliptical galaxy dwarfs its spiral sibling.

Fermi bubbles

Galaxies

Milky Way's Black Hole Once Active

Evidence continues to mount that our galaxy's supermassive black hole was not always the quiet neighbor it is now.

Cosmology

New Heavyweight Galaxy Cluster

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

Cosmology

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.

Galaxies

Galaxy Zoo's Odd Black Holes

Citizen scientists are helping astronomers understand how galaxies and their resident supermassive black holes grow.

Stellar Science

Black Holes Might Form Like Planets

Astronomers have plenty of evidence for small and large black holes, but have had little luck tracking down the mid-sized variety. One team of researchers suggests the search has been focused on the wrong places all along.

Galaxies

Andromeda Galaxy’s Odd Double Core

A new study simulating stars as they orbit a black hole might provide the best explanation for how our nearest spiral galaxy neighbor grew its lopsided nucleus.

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