Did early galaxies form around black holes, or did black holes form within young galaxies?
Green Goblins
Eight galaxies have been found with emission nebula much brighter than the central quasar, and might be due to binary black holes from a galactic merger.
Darker Matter
A study of 72 colliding galaxy clusters has found that dark matter is not only real, it interacts with itself even less than we thought.
Give Peas a Chance
Small, greenish galaxies known as “green peas” may have been key to ending the cosmic dark ages after the big bang.
Beasts of the Southern Wild
A team analyzing data from a deep sky survey have found 3 – 9 new dwarf galaxies. Their findings may help answer a nagging mystery of dark matter.
Beryllium Sphere
Using an elemental trick, we can determine the age of our Milky Way galaxy.
The Other White Meat
Why are lenticular galaxies so … lenticular?
In Your Arms
At least one spiral arm of our home galaxy may extend much farther than we thought.
My God, It’s Full of Stars
One of the more difficult ideas to grasp in astronomy is the sheer scale of the cosmos. Even as a professional in the field it’s much easier to focus on numbers and data than really step back and appreciate scale. Every now and then there is an image that forces you contemplate scale, such as the Hubble Ultra Deep Field. Now NASA and ESA have released a new image of the Andromeda galaxy. It is the most detailed image of Andromeda ever made,and you can check it out in this video.