181–200 of 242 results

Stellar Science

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.

Galaxies

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

Galaxies

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?

Milky Way

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

Galaxies

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.

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.

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.

Stellar Science

Small Planets’ Evolutionary Edge

The discovery that planets can form around a variety of stars — and not just specific types, as previously thought — might open the floodgates on the search for habitable worlds in the galaxy.

Galaxies

WISE Identifies Mystery Sources

Astronomers are using infrared observations from NASA's WISE spacecraft to identify sources seen at energies a million times greater. The work may help astronomers figure out whether they've detected unknown cosmic phenomena.

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.

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