181–200 of 275 results

Galaxies

Citizen Scientists Probe Early Galaxies

New data collected by Galaxy Zoo show early galaxies with central bars, providing implications about how galaxies grow.

ultracompact dwarf galaxy

Black Holes

Small Galaxy Boasts Big Black Hole

Astronomers have detected a supermassive black hole in the center of a tiny galaxy — where it has no right to be.

Quasar illustration

Galaxies

The Quasar Main Sequence

A new diagram might link the diverse visible-light characteristics of quasars to two physical properties — essentially, their accretion rate and orientation. If the analysis holds up, it could point the way toward a long-sought unification.

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.

compact star-forming galaxy

Galaxies

Building Big Elliptical Galaxies’ Cores

Astronomers are tracking down the seeds that likely grew to become today’s most massive elliptical galaxies.

Galaxies

Question Reopened: How do Galaxies Grow?

Evidence from observations sheds doubt on cosmic cannibalism as a source for galaxy growth, suggesting that instead galaxies grow by pulling in gas from the intergalactic medium.

Cosmology

Dwarf Galaxies Packed a Mighty Punch

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

Galaxies

Gas Streamer Eclipses AGN

Astronomers have detected a high-speed, long-lasting gas streamer spewing from the active galactic nucleus of NGC 5548. This discovery might provide new insights into how supermassive black holes influence their host galaxies.

Galaxies

Spotting a Nearby Quasar’s Winds

A neighboring galaxy’s central black hole powers strong winds, allowing astronomers — for the first time — to spot those gales pushing out star-forming gas.

M22

Galaxies

Star Cluster Runs Away From Home

A hive of stars is sailing toward Earth at more than 2 million miles per hour — and racing away from the giant galaxy it used to call home.

Galaxies

Pro-Am Collaboration Yields Stunning Images

Amateur astronomers have teamed up with the pros to produce four stunning multiwavelength images of galaxies M101, M81, M51, and Centaurus A.

Galaxies

A New Galactic Yardstick

Astronomers have developed a new method to measure distances to bright but faraway galaxies, a tool which will help better constrain the expansion rate of the universe.

Astrobiology

Fooling with the Universe

This year’s April Fools' provides a wealth of alarming results. Catch up on all the scientific shenanigans here.

http://hubblesite.org/newscenter/archive/releases/2000/2000/37/image/a/

Black Holes

Dust in the Heart of Circinus

Infrared observations of the Circinus Galaxy may help reveal the shape of the dusty region fueling its active galactic nucleus and shed light on what governs dust structures in other galaxies.

Cosmology

Dark Matter Spotted in the Milky Way?

A team of astronomers claim to have the most compelling case for annihilating dark matter yet.

B-mode discovery telescope

Galaxies

Direct Evidence of Big Bang Inflation

Researchers with an experiment based at the South Pole have discovered the long-sought "smoking gun" for inflation. The signal was hidden in polarization patterns in the cosmic microwave background and confirms physicists' audacious theory of how the Big Bang happened.

BICEP-2 detector at the South Pole

Cosmology

"Proof of Inflationary Universe" to be Announced

Rumors are flying that the long-sought "smoking gun" for inflation has been found in polarization patterns in the cosmic microwave background. If so, it would confirm the inflation theory for how and why the Big Bang happened.

http://www.spacetelescope.org/news/heic1404/

Galaxies

Hubble Displays Galactic Jellyfish

These stunning new images of spiral galaxy ESO 137-001 highlight its violent encounter with the intracluster plasma of Abell 3627, which is stripping away its gas and forming stars in the streamers.

pulsar with beam

Galaxies

Rocky Encounter with Stellar Lighthouse

Asteroid debris might be bombarding a radio pulsar in the constellation Puppis.

Planck cosmic microwave background

Galaxies

Mystery of the Missing Galaxy Clusters

Astronomers have counted up the number of galaxy clusters in the cosmos and found a problem: the number is much lower than they expected. What's going on?