Sentences with phrase «since dwarf galaxies»

Not exact matches

Scientists have struggled to investigate dark matter since 1933, when astronomer Fritz Zwicky observed a cluster of galaxies moving so fast that, like Hubble's dwarves, they should have been ripping apart.

One of the rare and brief bursts of cosmic radio waves that have puzzled astronomers since they were first detected nearly 10 years ago has finally been tied to a source: an older dwarf galaxy more than 3 billion light years from Earth.

The Milky Way Has a Posse Astronomers have known since the 1920s that our galaxy, the Milky Way, is surrounded by smaller collections of stars, essentially dwarf galaxies.

Since big black holes tend to reside at the cores of big galaxies, the huge masses of these two compact galaxies» black holes — about 4 to 6 million times as massive as our sun — are the strongest indication that the dwarf galaxies are not traditional dwarfs and the black holes are not overweight.

Since the bulk of the stars in the Milky Way are red dwarfs, «one can not avoid studying them to understand planet formation or to evaluate the habitability potential of our galaxy,» HARPS researcher Xavier Bonfils, with France's Observatory of Sciences of the Universe of Grenoble, wrote in an email to Discovery News.

These satellite galaxies are classed as dwarfs, since they contain only a small fraction of the stars hosted in regular galaxies.

He has been a regular observer at Keck Observatory since 1997 studying elliptical galaxies, jets around NGC1097 and obtaining spectra of ultra compact dwarf galaxies in the Coma Cluster.

Since they contain up to 99 percent dark matter and just one percent observable matter, dwarf galaxies are ideal for testing whether existing dark matter models are correct.