Sentences with phrase «large galaxies such»

Not exact matches

Never before have astronomers been able to see individual stars inside an external spiral galaxy over such a large contiguous area.

Many galaxies in this catalogue are dwarf galaxies with indistinct structures, or active galaxies generating powerful jets — but a large number of the galaxies are interacting, such as Messier 51, the Antennae Galaxies, and galaxies in this catalogue are dwarf galaxies with indistinct structures, or active galaxies generating powerful jets — but a large number of the galaxies are interacting, such as Messier 51, the Antennae Galaxies, and galaxies with indistinct structures, or active galaxies generating powerful jets — but a large number of the galaxies are interacting, such as Messier 51, the Antennae Galaxies, and galaxies generating powerful jets — but a large number of the galaxies are interacting, such as Messier 51, the Antennae Galaxies, and galaxies are interacting, such as Messier 51, the Antennae Galaxies, and Galaxies, and Arp 256.

Tim Folger's «Nailing Down Gravity» story in the October issue presents physicist Moti Milgrom's Modified Newtonian Dynamics, a theory that may explain gravitational anomalies found in large - scale systems such as galaxies.

Merritt and Ekers project that a typical large galaxy will undergo a black - hole - tilting crash once every billion years — enough for one such event to pop off somewhere in the universe each year.

To measure the size of these ancient giant waves to such sharp precision, BOSS had to make an unprecedented and ambitious galaxy map, many times larger than previous surveys.

Meanwhile the light - subtracting techniques may improve measurements of other phenomena, such as large - scale galaxy motions and the expansion of the universe.

Satellite galaxies are small celestial objects that orbit larger galaxies, such as our own Milky Way.

Guyon adds that the system will help astronomers to study the skies more efficiently, by bringing large objects, such as nearby galaxies, into focus all at once, and by allowing more distant objects to be studied in a single snapshot.

However, the discovery also raises many new questions as the existence of such a bright and large galaxy is not predicted by theory.

By studying such a large data set — over 200,000 galaxies in 21 different wavelengths, or colors of light, from ultraviolet to infrared — astronomers compared the energy emissions from galaxies across a wide swath of space and time to read the history of the universe.

From her perspective, though, the real interest lies in a much larger but sparser spherical cloud of stars, known as the spheroid, surrounding such galaxies.

The largest stars explode soon after birth, rocking their cradles and enriching their galaxies with planet - and life - forming materials such as oxygen and iron, while stars born small live quiet lives and make little contribution to their galactic homes.

He did not expect to find any massive galaxies earlier than about 9 billion years ago because theoretical models predict that such large objects form last.

The new generation of large ground - based telescopes, such as the 10 - metre diameter Keck Telescope at Hawaii, should allow us to see galaxies and clusters of galaxies in the process of formation.

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.

This is a subtle variant of weak gravitational lensing, in which the light emitted from distant galaxies is slightly warped by the gravitational effect of large amounts of matter, such as galaxy clusters.

Also, as pointed out by Turner earlier this year, an older Universe gives the favoured cold dark matter model time to make the large collections of galaxies seen today, without bringing in any other «fixes», such as the addition of hot dark matter (New Scientist, Science, 16 July).

«The one thing that is clear is that all the models of galaxy formation do not predict such large spinning disks,» says Chapman.

Residing in the dwarf galaxy IC 10, 1.8 million light - years away in the constellation Cassiopeia, the new black hole puzzles researchers because it is thought that the kind of star that would give birth to it would not have retained enough mass to produce such a large object.

The observations fit well with computer simulations, and can be used to refine models of how large - scale patterns, such as the distributions of galaxies and clusters of galaxies, came to be.

Dark matter's presence has for decades been inferred from its gravitational effects on large - scale structures such as galaxy clusters, but because it does not interact much with ordinary matter and does not emit or absorb light — hence the «dark» moniker — it has so far proved impossible to observe firsthand.

The supermassive black hole found in NGC 1600 is one of the first successes of the project, proving the value of a systematic search of the night sky rather than looking only in dense areas like those occupied by large clusters of galaxies, such as the Coma and Virgo clusters.

Supersize ground telescopes — such as the Thirty Meter Telescope planned for Mauna Kea, Hawaii, and the European Extremely Large Telescope, spanning 42 meters (140 feet)-- will help astronomers probe the properties of the first galaxies, starting around 2018.

String theory has emerged as the most promising approach to unifying quantum mechanics — the laws governing very, very small things such as atoms, nuclei and quarks — with general relativity, which describes the world on a scale as large as that of stars and galaxies.

On the other hand, if there are 100 billion suitable planets in our galaxy, if the origin of life is highly probable, if there are billions of years of evolution available on each such planet and if even a small fraction of technical civilizations pass safely through the early stages of technological adolescence, the number of technological civilizations in the galaxy today might be very large.

Spiral galaxies such as the Great Nebula in Andromeda are obvious candidates, but the elliptical galaxies are much older and more highly evolved and could conceivably harbor a large number of extremely advanced civilizations.

Cosmologists typically focus on the large - scale properties of the universe as a whole, such as galaxies and intergalactic medium; while astrophysicists are more interested in testing physical theories of small - to medium - sized objects, such as stars, supernovae and interstellar medium.

It is not clear how it could have made such a large impact on the heavier galaxy without being wounded itself.

Astronomers have known for some 10 years that nearly every large galaxy contains at its core an immense black hole — an object having such intense gravity that even light can not escape.

Such a shortfall is particularly prominent in luminous infrared galaxies (LIRGs), which have high star formation (and thus CCSN) rates and host bright and crowded nuclear regions, where large extinctions and reduced search detection efficiency likely lead to a significant fraction of CCSNe remaining undiscovered.

The currently favored cosmological galaxy models are based on the idea of hierarchical structure formation: that structures in the universe such as galaxies develop from small «overdensities» to become large - scale objects.

Now the researchers hope that future observations of a large number of distant galaxies using the ALMA telescopes could help unravel how frequently such evolved galaxies occur in this very early epoch of the history of the universe.

In the majority of cases, the ALMA observations alone could pinpoint the distances, but for a few galaxies the team combined the ALMA data with measurements from other telescopes such as the Atacama Pathfinder Experiment (APEX) and the ESO Very Large Telescope.

In such a model, the visible galaxies ablaze in starlight are like the tip of an iceberg — the visible matter is at the very densest part of much larger dark matter chunks.

We know that such objects need to have a low - density environment without other large galaxies nearby that would disturb it, but they also need a supply of small but gas - rich «dwarf» galaxies to accrete and build the really large diffuse extended disk.

Maunakea, Hawaii — An international team of astronomers, led by Michele Cappellari from the University of Oxford, has used data gathered by the W. M. Keck Observatory in Hawaii to analyze the motions of stars in the outer parts of elliptical galaxies, in the first such survey to capture large numbers of these galaxies.

is difficult to reconcile with the obvious clumping of matter into galaxies, clusters of galaxies, and even larger features extending across vast regions of the universe, such as «walls» and «bubbles».»

«The masses of these dark halos varied from small to large, and so the galaxies that formed within them also vary in such a manner,» Yozin explains in an email interview.

Dark energy is detected by its effect on the rate at which the universe expands and its effect on the rate at which large - scale structures such as galaxies and clusters of galaxies form through gravitational instabilities.

The merging of small galaxies into larger ones is common throughout the universe, but because the shredded galaxies are so faint it has been hard to extract details in three - dimensions about how such mergers proceed.

Based on their observations, they have concluded that the rate of a TDE occurring increases «dramatically» when two galaxies are colliding, most likely due to the fact that such events cause a large number of stars to be formed near the central supermassive black holes of the merging systems.

The current explanation is that such quasars and their host galaxies assembled within even larger haloes of dark matter, which enabled them to form very quickly.

Most of these have been found to precede large Type - II supernovas of massive stars (sometimes called «hypernova») in star - forming regions within distant galaxies, which is logical since massive stars live such short lives that they don't have time to move far from their birthplace.

Continued fragmentation would have produced increasingly smaller assemblies, finally spawning individual galaxies such as our Milky Way and its neighbors, the Large and Small Magellanic Clouds.

To explain active galaxies, scientists must be able to explain how they emit such large amounts of energy from such small areas of the galactic nuclei.

On the other hand, several similarities were discovered with the chemical composition observed for stars in nearby massive dwarf galaxies, such as Sagittarius and the Large Magellanic Cloud.

While galaxies are challenging to study at such large distances, nature occasionally gives us an advantage through the phenomenon of gravitational lensing.

A collision between two large galaxies is usually the cause of such starburst phases, where the cold gas residing in the giant molecular clouds becomes the fuel for sustaining such high rates of star formation.

Or in the case of a 2015 result using Hubble observations of large elliptical galaxies, jets from supermassive black holes may regulate star formation in such a way that it keeps going, albeit at a slower rate.

As for the mass of galaxies — I think most physicists will readily admit that such measurements are highly provisional, subject to large error bars, and reliant on assumptions that could possibly be invalidated in the future.