Sentences with phrase «galaxy clusters at»

5 And Out of Control The fireball probably entered the galaxy cluster at an angle and now follows an eccentric path.

«It appears that we have captured this galaxy cluster at a critical stage just as it has shifted from a loose collection of galaxies (protoclusters) into a young, but fully formed galaxy cluster,» David Elbaz from CEA and the study's co-author, said in the statement.

Not exact matches

But new observations reveal a startling result: it's actually the collision of four separate clusters of galaxies, all slamming into each other at the same time!

Patrick Kelly at the University of California, Berkeley and his colleagues found the star in Hubble Space Telescope images of a galaxy cluster called MACS J1149.

A smooth - universe approximation is sensible, because when we look at the big picture, averaging over the structures of galaxy clusters and voids, the universe is remarkably uniform.

Lotz is leading a three - year effort, known as the Frontier Fields project, to stare at six massive clusters with the Hubble Space Telescope and hunt for the seeds of galaxies similar to our own.

As well as the SMC itself this very wide - field image reveals many background galaxies and several star clusters, including the very bright 47 Tucanae globular cluster at the right of the picture.

But if you have clusters of black holes at the centers of galaxies, there are mechanisms by which some could rapidly grow, form binaries and merge with each other.»

Follow - up images and analyses, posted June 30 at arXiv.org, showed that light is probably from a single bright blue star that coincidentally was behind the galaxy cluster, aligned along Hubble's line of sight.

And although MOND works well for stars moving in galaxies, it fails to predict the speeds at which galaxies in clusters orbit each other.

The researchers used ALMA to study a galaxy at the heart of the Phoenix Cluster, an uncommonly crowded collection of galaxies about 5.7 billion light - years from Earth.

The gas ball travels at 1.8 million miles an hour — 600 times faster than a speeding bullet — through the galaxy cluster, giving researchers clues as to how such clusters grow.

Last year a team at University College London used the clustering of galaxies as a proxy for the clumping of matter, and their result put that mass at under 0.28 electronvolts, less than one - millionth the mass of an electron.

Astronomer Tiantian Yuan at Swinburne University of Technology in Melbourne, Australia and colleagues found the new record - holder thanks to a closer cluster of galaxies, which acted as a gravitational lens that helped astronomers produce two magnified images of A1689B11 (SN: 3/10/12, p. 4).

James Binney at the University of Oxford says some sort of MOND - like behaviour may apply within galaxies while on larger scales, as in galactic clusters, dark matter would hold sway.

Gas at the centre of galaxy clusters should be cooling as it loses energy; this would allow nearby material to compress the gas and create ideal conditions for making stars.

On scales larger than galaxy clusters, all galaxies are indeed moving apart at an ever increasing rate.

This is an artist impression of galaxy at the center of the Phoenix Cluster.

In July, Thomas Reynolds, Morgan Fraser and Gerard Gilmore, all at the University of Cambridge, reported they had seen another supergiant fade to black amid a star cluster in archival Hubble Space Telescope observations of the galaxy NGC 3021.

This ambitious three - year effort teams Hubble and NASA's other Great Observatories to look at select massive galaxy clusters to help astronomers probe the remote universe.

Researchers used supernovas, cosmic microwave background radiation and patterns of galaxy clusters to measure the Hubble constant — the rate at which the universe expands — but their results were mismatched, Emily Conover reported in «Debate persists on cosmic expansion» (SN: 8/6/16, p. 10).

The globular clusters M15 (left) in our Milky Way and G1 in the nearby Andromeda galaxy both harbor medium - size black holes at their cores.

The phenomenon was so unexpected that he conducted an expanded survey, looking at more and brighter galaxy clusters.

GALAXY CLUSTERS Two kinds of mass have been missing from astronomers» view of the universe: matter that emits only X-rays and matter that emits nothing at all.

What's more, as Zwicky first wrote in a Swiss journal, galaxies in the Coma cluster seemed to be moving in relation to one another at rates that would violate the laws of gravity, unless you posited the mysterious presence of a great deal of Dunkle Materie (or dark matter).

In the Fornax cluster (right) the core cloud is swept back like a comet's tail toward the top of the image, indicating it is moving through even more diffuse gas on a collision course with the galaxy at lower left.

The most plausible option... is the dark matter in at least one of the galaxies is feeling a frictional force from the dark matter in the cluster.»

The research, also posted online at arXiv.org, negates an earlier finding that stars were separated from their dark matter in Abell 3827, a cluster including four colliding galaxies about 1.3 billion light - years from Earth (SN: 5/16/15, p. 10).

Red indicates 10 million Kelvin gas at the centers of massive galaxy clusters, while bright structures show diffuse gas from the intergalactic medium shock heating at the boundary between cosmic voids and filaments.

Astronomers have theorized that as a field galaxy falls into a cluster of galaxies, it encounters the cloud of hot gas at the centre of the cluster.

An unexplained X-ray signal from the swirling Perseus galaxy cluster could be the death rattle of an elusive particle — and hint at the nature of dark matter

Now, a team at the University of California Irvine has used observations from NASA's Fermi space telescope, along with data from all - sky surveys, and applied updated calculations to observe our galaxy's centre — where there is thought to be a cluster of dark matter.

The surprise implication: We are plunging — literally — in the direction of Leo at a rate of 375 miles per second, drawn in by the gravitational pull of vast clusters and superclusters of galaxies.

In 1933, the Swiss astronomer Fritz Zwicky (pictured, right), working at the California Institute of Technology in Pasadena, applied this principle to the motion of galaxies that make up the Coma cluster, a group of over 1000 galaxies some 300 million light years from us.

Looking at random parts of the sky with Hubble, astronomers have found what appears to be the most distant protocluster ever seen: five galaxies in the process of growth, forming a cosmic collection that may grow into a massive cluster.

And since the color and brightness of young clusters gives their ages — and therefore, the time since a collision began — astronomers hope to put together a series of snapshots of the entire collision process by looking at many examples of merging galaxies.

Some stars in globular clusters may be 15 billion years old, he says, but the great bulge at the center of the Milky Way — a younger part of the galaxy, according to conventional wisdom — actually holds stars that are 1 or 2 billion years older.

Ask most astronomers where to find the oldest stars in the galaxy and they'll tell you to look at globular clusters, dense knots of stars that hover above and below the plane of the Milky Way.

Astronomers have already begun leveraging Hubble and other space telescopes to create a preview of what Webb may reveal, staring at some of the largest galaxy clusters in a project called «Frontier Fields.»

Then two massive colliding galaxy clusters in the constellation Carina caught the attention of Marusa Bradac of the Kavli Institute at Stanford University and her colleagues, who saw this cosmic smashup as a chance to watch dark matter in action.

At some point, a cluster becomes a galaxy — the Oxford English Dictionary suggests «millions or billions» of stars is enough — but there has never been an official threshold.

It said that everything that happens in the cosmos at large — be it an apple falling from a tree on Earth or the distant whirling of a cluster of galaxies — happens because stuff follows invisible contortions in space and time that are caused by the presence of other stuff.

«Trace of galaxies at the heart of a gigantic galaxy cluster.»

«We asked ourselves how the sensitive ultra-diffuse galaxies could survive at all in an environment as unsettled as a galaxy cluster,» explains Carolin Wittmann, first author of the study and PhD student at the Institute for Astronomical Computing (ARI) at the ZAH.

The study led by Donahue looked at far - ultraviolet light from a variety of massive elliptical galaxies found in the Cluster Lensing And Supernova Survey with Hubble (CLASH), which contains elliptical galaxies in the distant universe.

Unfortunately, at a temperature of just a few million degrees (much cooler than the extremely hot gas in galaxy clusters), it is extremely hard to detect.

A new study based on observations with the Hubble Space Telescope has shown that the most massive galaxies in the universe, which are found in clusters like this, have been aligned with the distribution of neighboring galaxies for at least 10 billion years.

And when Vera Rubin, an astronomer at the Carnegie Institution of Washington, showed in the 1970s that there was a matter deficit not only in galaxy clusters but also in individual galaxies, interest perked up.

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.

Captured using the exceptional sky - surveying abilities of the VLT Survey Telescope (VST) at ESO's Paranal Observatory in Chile, this deep view reveals the secrets of the luminous members of the Fornax Cluster, one of the richest and closest galaxy clusters to the Milky Way.