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.
Our galaxy’s central supermassive black hole emits regular, mysterious X-ray flares. For the first time, NASA’s newest sharp-eyed telescope has captured a high-energy view of the action.
The Orion Nebula hosts a well studied star cluster, the gold standard by which astronomers measure all other clusters. New research suggests that this benchmark might need to be revised.
Astronomers announced that they've successfully tracked a star that takes less than 12 years to whip around the Milky Way's central black hole. The star isn't so special on its own, but combined with other observations it might help unwrap the region's mysteries.
New radio observations suggest that one of the brightest globular clusters in the sky, Messier 22, hosts two stellar mass black holes.
The Orion Nebula Cluster might be home to a black hole more than 100 times the mass of the Sun, according to a recent simulation.
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.
A collaboration between professional and amateur astronomers is producing a careful map of stellar brightnesses and colors across the entire night sky. The survey should fill a hole that sometimes hampers quick, accurate measurements of events such as supernovae.
Astronomers hunting for brown dwarfs in our solar neighborhood have been thrown a surprise: these star wannabes are far less common than previously thought.
If anyone's still around 4 billion years from now, they'll have a ringside seat for a true clash of titans, as the Milky Way and Andromeda galaxies smash into each other and merge.
In just 10 months during 2010, an orbiting observatory meticulously recorded a "heat map" of the entire celestial sphere, revealing unseen beauty in the Milky Way and providing astronomers with a catalog of more than a half billion celestial objects.
A new analysis suggests that "nomad" planets, ejected from their home stellar systems and now adrift in the icy dark of interstellar space., could outnumber stars by as many as 100,000 to 1.
Observations of a black hole that spat out twin blobs of superhot material may help astronomers understand how the mysterious beasts create powerful jets that shoot out from their poles. The blobs appeared just as the system went quiet in X-rays.
Astronomers have discovered a dusty, stretched-out cloud heading for the supermassive black hole lurking in the Milky Way's core. The blob could be the meal the beast needs to wake up for a bit from its slumber, if the cloud survives its incoming trip on the dining cart.
Recent gamma-ray observations support the longstanding theory that superspeedy particles called cosmic rays have their origin in the havoc-ridden regions around young star clusters.
Astronomers have pinned down the distance, mass, and spin rate for the first black hole candidate discovered, information that points to a birth sans supernova.
Some deceptively youthful stars may find their fountains of youth in material they grab off other stars.
Austrian amateur Matthias Kronberger has found a planetary nebula near the northern constellation of Cygnus, the Swan. His discovery might help scientists understand the role of stellar companions in the formation of these glowing gas clouds.
Astronomers have observed a neutron star flaring to 10,000 times its original brightness.
The first blue stragglers identified in the Milky Way’s bulge pose a question: why do they look so young?
Using a deceptively simple setup, Randy Halverson has captured the galaxy's motion across his South Dakota farm with breathtaking beauty and realism.
Astronomers have struggled for decades to discern our galaxy's true shape. But they're slowly getting the picture, thanks to the discovery of a long arm that traces the grand spiral to its outer limits.
Just-released observations suggest that the Milky Way could teem with hundreds of billions of free-floating planets.
Now streaking away in the Milky Way's outermost halo, HE 0437-5439 had a very close run-in with the galaxy's central black hole. And that was just the beginning.
Don't let its graceful spiral form fool you: our home galaxy is a cannibal. It's long been accused of having gobbled up smaller dwarf galaxies in its vicinity — and two new observations make an ironclad case for the prosecution.