Sentences with phrase «present galaxy clusters»

This would be an early phase of strong environmental effects seen in the present galaxy clusters.

Not exact matches

As it has countless times in the past and present, (the Holocaust, the Bubonic Plague, the World Wars, countless natural disasters, (floods, storms, earthquakes, etc), the Sky Myth was on vacation when, on a tiny speck of a planet, on a boring arm of the galaxy, in an average galaxy cluster among billions, a bad thing happened.

In the bottom box is a reconstructed image, based on modeling, that shows what the galaxy would look like if the galaxy cluster were not present.

Among other things, the new map will help astronomers to understand and explain the motion of the Milky Way, which is apparently being tugged by the gravity of neighboring groups and clusters of galaxies, says 2MASS team member Karen Masters of the University of Portsmouth in the United Kingdom, who presented the it here at the summer meeting of the American Astronomical Society.

A striking image presented here 3 June at the meeting of the American Astronomical Society shows a globular cluster known as Palomar 5 being torn asunder by tidal forces of our home galaxy.

To determine how and why clusters formed, it is critical to investigate not only mature galaxy clusters as seen in the present Universe but also observe protoclusters, galaxy clusters in the process of forming.

Both the COBE ripples and the large - scale clustering of galaxies can be explained by a CDM universe in which 80 per cent of the present mass density is contributed by a cosmological constant, though some cosmologists argue that such theories may not explain the motions of galaxies.

At present it makes itself felt only over huge distances, such as the gaps between clusters of galaxies, but Caldwell says that some theories indicate that dark energy might just be kicking into gear.

Some ellipticals are present in the central part of the cluster including a giant elliptical at the center (M87) that has become so large by gobbling up nearby galaxies that were attracted by its enormous gravity.

This statement is certainly true if we assume that the only gravitational force present is that exerted by visible matter, but it is true even if we assume that every galaxy in the cluster, like the Milky Way, is surrounded by a halo of dark matter that contains 90 percent of the mass of the galaxy.»

It is thus an example of a progenitor or ancestor of a present - day galaxy cluster, or proto - cluster for short.

The newly discovered «proto - cluster» of galaxies, observed when the universe was only 1.7 billion years old (12 percent of its present age), is one of the most massive structures known at that distance.

Galaxy clusters are commonly observed in the present - day universe and contain some of the oldest and most massive galaxies known.

Dr. Jean Brodie, from the University of California at Santa Cruz, will trace the formation and evolution of galaxies over cosmic time, making use of some «astronomical fossils» called globular star clusters, that are bright beacons tracing all the mergers and acquisitions that have assembled into present day galaxies.

«We present results from an optical - infrared photometric study of early - type (E+S 0) galaxies in 19 galaxy clusters out to z = 0.9.»

SDSS studies have probed the dark matter environments of quasars through clustering measurements, revealed populations of quasars whose central engines are hidden by obscuring dust, captured changes in quasar spectra that show clouds moving in the gravitational grip of the central black hole, and allowed a comprehensive census of the much fainter accreting black holes (active galactic nuclei, or AGN) in present - day galaxies.

In the adjacent gallery, Thater presents Visual Voyage: Milky Way to the Virgo Cluster (2015) and Aquarius Halos (2015), two videos of stars and galaxies swirling and advancing toward the viewer.