This led to the conclusion that there are a factor of 10 more galaxies in a given volume of space when the universe was a few billion years old compared with today. Most of these galaxies are low mass systems with masses similar to those of the satellite galaxies surrounding the Milky Way...
Surrounding the galaxy for thousand and thousand of light years is space.At great distances,however,billions of other galaxies are scattered.These galaxies are of many shapes and sizes.The Milky Way Galaxy is shaped like a spiral(螺旋型)disk.Other galaxies have been found to be shaped like ...
Another possibility is to look for indirect effects of dark matter particles in our galaxy, or dwarf galaxies surrounding the Milky Way. The main idea underlying this kind of research is the possibility for dark matter to annihilate (or decay) in the interstellar medium, or generally near ...
The highly organized distribution of satellite galaxies surrounding the Milky Way is a serious challenge to the concordance cosmological model. Perhaps the... GW Angus,D Antonaldo,K Pavel - 《Monthly Notices of the Royal Astronomical Society》 被引量: 36发表: 2011年 Very deep spectroscopy of the...
News and research on the formation of galaxies. From the Milky Way to Andromeda Galaxy, see astronomy images of splendid galaxies in the universe. Read the latest research discoveries.
Stars and Galaxies Ssections 1 Observing the Universe 2 Evolution of Stars Lab Star Cluster Age 3 Galaxies and the Milky Way 4 Cosmology Lab Expansion of the Universe Colliding Galaxies These two spiral galaxies, known as "the mice," have been colliding for about 160 million years. Eventually...
These galaxies have an enormous dense region in the center and a flat disk surrounding it but no spiral arms. In the 1960’s numerous ring- and disk-shaped galaxies were discovered with all gradations of abundance of hot stars and dust. As far back as the 1930’s elliptical dwarf ...
There are still many mysteries surrounding galaxy formation, but on the next page we'll explain some of the best theories about it. Light-years Away Galaxies are far apart. The Andromeda galaxy, which is also called M31 (Messier object #31), is the closest galaxy to us — 2.2 million...
Gallimore JF, Baum SA, O’Dea CP (1997) A direct image of the obscuring disk surrounding an active galactic nucleus. Nature 388(6645):852–854. https://doi.org/10.1038/42201. arXiv:astro-ph/9708062 Article ADS Google Scholar Gallimore JF, Elitzur M, Maiolino R, Marconi A, O’Dea...
Yet another surprising realization about Porphyrion to astronomers was its “mode.” When a supermassive black hole’s gigantic gravitational forces begin to pull and heat surrounding material, they begin emitting energy as either radiation or in jets. Radiative-mode black holes were generally a stap...