Using the Hubble Space telescope and other observatories, astronomers have completed the most accurate census of galaxies in the observable universe to date. In terms of the actual number, let’s just say we were way the hell off.
This week, scientists with the Dark Energy Survey (DES) collaboration released the first in a series of detailed maps charting the distribution of dark matter inferred from its gravitational effects. The new maps confirm current theories that suggest galaxies will form where large concentrations of dark matter exist.
For the first time ever, astronomers have observed a galaxy in its initial phase of development. The discovery of a massive galaxy, dubbed "Sparky," reveals a dense galactic core that's producing new stars at a ferocious rate.
See that reddish cloud inside this supernova's shockwave? It's a massive plume of dust that formed shortly after the star ripped itself to shreds. The observation was made using the the brand new ALMA telescope — and it's one that will help explain how galaxies got their dusty and dim complexion.
Located about 212 million light-years from Earth, the massive spiral galaxy NGC 6872 has been known to astronomers for decades. But it wasn't until a recent survey of nearby star-forming regions that NASA scientists realized just how big it truly is. New data shows that, from tip-to-tip across its two outsized spiral…
As surprising as this may sound, physicists and astronomers aren't entirely sure how spiral galaxies like the Milky Way got their exact shape. Any attempts to generate a spiral galaxy from scratch resulted in a computer simulation that showed a giant ball with too many stars. But a new study to be published in the…
According to predictive models, there should be thousands of ancient and tiny ‘dwarf galaxies' in our neighborhood — but to date, astronomers have found but a few. And those discovered contain puzzlingly few stars, giving rise to the name ‘ghost galaxies.' This problem has led to the theory that dwarf galaxies must…
When thinking about how galaxies form, scientists have speculated about large masses of gas that are drawn together to form a kind of embryonic proto-galaxy. But because these supposed objects are starless, they would be practically invisible, thus making them impossible to detect — or so it would seem.
Astrophysicists have been trying for nearly two decades to produce a model capable of simulating the genesis of a spiral galaxy — the class of flat, rotating disk galaxies to which our own Milky Way belongs. And now, they've finally done it.