SUNSET: 
Hubble's Colliding Galaxies
No two galaxy collisions are alike, as shown in 59 weird images just released by the Hubble Heritage Project.
A Record-Breaking Gamma-Ray Burst
The visible-light glow of a gamma-ray burst briefly shone at magnitude 5.4, despite its distance of 7.5 billion light-years — more than halfway across the visible universe.
Standard-Candle Supernova Confusion
Type 1a supernovas are crucial for measuring how the expansion of the universe has been changing. But no one knows for sure exactly what they are.
Monster Black Holes Soon to Collide?
The members of a binary black hole in Cancer, one of which is unbelievably massive, look to be on a collision course.
Astronomers Find Double Einstein Ring
A unique example of gravitational lensing in the universe gives clues to the distribution of dark matter in galaxies.
Cold Evidence for a Cosmic "Texture"?
A ripple in the cosmic background radiation hints at an irregularity in spacetime. . . maybe.
Refining Hipparcos's Star Distances
To extract even better star distances, a Cambridge astronomer who took part in the Hipparcos mission has just completed a whole new analysis of the raw data.
Mystery Pulse from Outer Space
Six years ago a radio telescope in Australia recorded a mysterious radio burst that lasted only a tiny fraction of a second and reached Earth from more than a billion light-years away. Astronomers have no idea what caused it.
Finding the Missing Dwarf Galaxies
Minigalaxies of dark matter ought to be everywhere, says the best theory of how the universe came to be. Now they're finally being found.
A Whole Lotta Nothing
If you're looking for a place to really get away from it all, head toward a lovely spot in southeastern Eridanus.
Whole Lot of Nothing
A billion light-year-wide "hole" in space is a very cold and empty place.
"Magnificent" Neutron Star Found
Sizzling with X-rays but mum at radio frequencies, a nearby, on-its-own neutron star is causing astronomers to scratch their heads.
Bright Galaxies You Can't See
Astronomers have found massive, luminous infrared galaxies 12 billion light-years away. It's not at all clear how they got there.
Big Checks for Astronomers
Two teams of astronomers have won $500,000 for revealing that the universe is growing bigger at an ever increasing rate.
Thanks to Akari, I'm Seeing (Infra)Red
Japanese and European astronomers have proudly unveiled the first all-sky map of the deep infrared sky in more than 20 years.
Where was the Big Bang located?
The commonest misconception about the Big Bang is that it happened at some particular spot in preexisting empty space.
