81–100 of 237 results
An Unusual Star: Wolf-Rayet Nasty 1

Cosmology

An Unusual Star: Wolf-Rayet Nasty 1

Starry cannibalism of Wolf-Rayet Star Nasty 1 may offer clues as to how massive, pre-supernova stars evolve.

Cosmology

Mapping Dark Matter

Two projects are mapping the distribution of dark matter in the universe, probing scales both large and small.

massive galaxy evolution

Cosmology

Ancient Galaxies Seen Dying Inside-Out

Astronomers have found massive galaxies 3 billion years after the Big Bang that are dying from the inside out.

Einstein Ring of Fire

Galaxies

Ring-Shaped Spyglass to Early Universe

A rare type of gravitational lens offers astronomers a close look at a young, dusty galaxy manufacturing hundreds of stars a year.

Cosmology

How Slippery Is Dark Matter?

Dozens of galaxy clusters confirm that dark matter particles slip right past each other within messy cluster mergers.

Potential dwarf galaxies

Cosmology

New Dwarf Galaxies Near Milky Way

Astronomers have found a set of new dwarf galaxy candidates near the Milky Way Galaxy, a discovery crucial to understanding dark matter.

Supernova Refsdal

Galaxies

Hubble Spots a Lensed Supernova

For the first time, astronomers are watching as a supernova’s light bends around a massive galaxy on its way to Earth.

Abell 1689

Cosmology

Dusty Galaxy in the Early Universe

A small galaxy 700 million years after the universe’s birth has a dust reservoir that makes it look like a much older galaxy.

artist's impression of a black hole

Cosmology

Monster Black Hole in Early Universe

Astronomers have discovered one of the brightest quasars in the early universe. The source, SDSS J010013.02+280225.8 (hereafter J0100+2802), is powered by a supermassive black hole at a redshift of 6.3, meaning that its light left it 12.8 billion years ago.

cosmic microwave background polarization

Cosmology

Planck Upholds Standard Cosmology

The Planck team has finally released its full-mission data, revealing a remarkably detailed view of our universe and our galaxy.

Cosmology

Cosmic Inflation Signal Just Dust

The long-awaited analysis of spiraling polarization patterns called B-modes affirms that these signals, purportedly from the universe’s post-birth inflation, are probably from dust in our galaxy instead.

Planck_polarization_image_of_BICEP2_field

Cosmology

BICEP's Big Bang Finding Reduced to Dust

Yes, it was too good to be true. The cosmic "discovery of the century" last March has officially blown up. Or will blow up next week when a new analysis of polarization in the cosmic microwave background is officially released. The excitement burst onto the world 10 months ago when…

artist's conception of BAO

Cosmology

BOSS: A Ruler to Measure Them All

Amidst the release of a treasure trove of astronomical data, scientists announce the most precise “standard ruler” yet for cosmological distances.

Coma Cluster

Cosmology

Dark Galaxies Discovered in Coma Cluster

A bizarre set of galaxies in the Coma Cluster have lost most of their stars (or star-making material), making them especially rich in dark matter.

dust polarization emission at galactic poles

Cosmology

Dust Makes Cosmic Inflation Signal Iffy

A new analysis of Planck data bolsters the claim that the polarization signal heralded as evidence for cosmic inflation is from dust instead.

local supercluster

Milky Way

Laniakea: Our Home Supercluster

Astronomers have mapped the cosmic watershed and discovered a massive supercluster that extends more than 500 million light-years and contains 100,000 large galaxies. The Milky Way sits on the edge of this humongous structure.

Cosmology

GRBs: A New Standard Candle?

Astronomers might be on the brink of developing a new rung on the cosmic distance ladder.

Galaxies

Dwarf Galaxies Packed a Mighty Punch

Light from the puniest galaxies played a bigger role in shaping the early universe than previously thought.

Cosmology

New Radio Burst Deepens Mystery

A newly discovered radio burst places these ultrafast, ultrabright pulses on the cosmic map of unknown phenomena.

Cosmology

The Mystery of the Missing Light

Astronomers recently discovered that there is not nearly enough ultraviolet light from stars and quasars in the local universe to account for observations of intergalactic gas.

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