Sentences with phrase «galactic clusters»

The ring may have been formed when two galactic clusters collided.

At a NASA press conference today, the astronomers said the ring may have formed one billion to two billion years ago, after a collision between two galactic clusters caused the surrounding dark matter to ripple outward like a stone dropped in water.

Researchers do not know what dark matter is, but they invoke it to explain why galactic clusters have enough gravity to hold themselves together.

In the 1930s, however, the astronomer Fritz Zwicky discovered that the outer parts of the Coma galactic cluster were rotating far faster than the cluster's estimated mass allowed.

A collision between giant galactic clusters seems to have separated the galaxies from their dark matter cores.

Dark matter was invoked to explain the unexpectedly high speed at which stars orbit within spiral galaxies and entire galaxies orbit within galactic clusters.

Supercomputer simulations model how galaxies and galactic clusters grow in long filamentary structures known as the cosmic web.

For instance, galaxies and galactic clusters behave as if they were far more massive than would be expected if they comprised only atoms and molecules, spinning faster than their observable mass would explain.

Using this method, astronomers have confirmed that galactic clusters indeed have high masses exceeding those measured by luminous matter and, as a result, have provided additional evidence of dark matter.

It also will be checking out the supermassive black hole of M87, a galaxy in the center of the massive Virgo galactic cluster.

When viewed in X-rays, Perseus appears to be the brightest galactic cluster in Earth's sky.

Experimentally, the absence of annihilation radiation from the Virgo cluster shows that little antimatter can be found within ~ 20 Megaparsecs (Mpc), the typical size of galactic clusters.

The measurement of hot gas pressure in galactic clusters has shown that there must be about five to six times as much dark matter as all the stars and gas we observe [source: Chandra X-ray Observatory].

A prior study suggested that CL 0024 +17 had collided with another galactic cluster one billion to two billion years ago.

For example, small differences in temperature across the sky show where parts of the universe were denser, eventually condensing into galaxies and galactic clusters.

On the scale of galaxies and galactic clusters, argues Bertolami, the errors will be small The researchers will publish their work in Physics Letters B.

About 5 billion light years from earth lies a giant ring of dark matter that apparently resulted from a huge collision between between two galactic clusters.

Cold Dark Matter Model A leading model of the universe's evolution since the Big Bang, in which slow - moving dark - matter particles clumped together, seeding the formation of galaxies and galactic clusters.

Also known as a galactic cluster, an open cluster consists of numerous young stars that formed at the same time within a large cloud of interstellar dust and gas.

Gravitational lens, as observed by the Hubble Space Telescope.In this picture a galactic cluster, about five billion light - years away, produces a tremendous gravitational field that «bends» light around it.

When astronomers Margaret Geller and Emilio E. Falco plotted the positions of galaxies and galactic clusters in the universe, it became clear that galactic clusters and superclusters are not randomly distributed.

Galaxies aren't randomly distributed throughout the universe — they tend to exist in galactic clusters.

It can be difficult to interpret the distortions that occur as light from distant galaxies becomes magnified and bent by the vast mass of the Frontier Fields» galactic clusters.

Or, more likely, galaxies and galactic clusters must contain an invisible form of matter — hello, dark matter — responsible for the observed gravitational effects.

M18 is a galactic cluster of magnitude 6.9.

In fact, supercomputer simulations of the formation of the universe show that galaxies, galactic clusters and larger structures can eventually form from aggregations of dark matter in the early universe.

A few intrepid stargazers turned their attention to galactic clusters — knots of galaxies (as few as 50 and as many as thousands) bound together by gravity — hoping to find pools of hot gas that had previously gone undetected and that might account for the mass being attributed to dark matter.

Between Earth and MACS0647 - JD, at a distance from us of 5.6 billion light years, is a galactic cluster called MACS J0647 +7015.