New observations from ALMA show a galaxy in the making.
The idea of long-slit spectroscopy is to only observe the spectrum of an object along a narrow line. From this we can determine the motion of stars in the galaxy.
On a dusty day, you can’t see the smog. At least that’s how it is for galaxies, which is why the detection of carbon in early galaxies is such a big deal.
The most luminous galaxy ever discovered shines brilliantly in infrared. This is likely due to a quickly forming supermassive black hole in its center.
Small, greenish galaxies known as “green peas” may have been key to ending the cosmic dark ages after the big bang.
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.
Using an elemental trick, we can determine the age of our Milky Way galaxy.
Why are lenticular galaxies so … lenticular?
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.