This so - called «cold» dark matter accurately describes large - scale structures
like galaxy clusters.
Massive objects
like galaxy clusters [2] warp and distort this space - time.
Not exact matches
God: You know how all that matter, that was generated after the bang, has started to clump and form all these cool features,
like stars and
galaxies, and even
clusters of
galaxies?
[Sukanya Chakrabarti et al,
Clustered Cepheid Variables 90 kiloparsec from the Galactic Center] Dwarf
galaxies like this one are thought to contain more dark matter than regular matter.
The star is visible because the
galaxy cluster's gravity bent spacetime around the
cluster, making it act
like a cosmic magnifying glass.
Assuming that's the case, the Coma
Cluster's population of diffuse
galaxies might be the opposite of
galaxies like Malin 1.
Some dark
galaxies,
like those in the Coma
cluster but with even less hydrogen, will be tougher to bring into the fold.
What this means is that it guarantees crystal - clear and contrast - rich views of deep sky objects,
like galaxies, nebulae, planets, and sparkling star
clusters.
The immense gravity from
clusters of
galaxies warps the light coming from more distant objects, acting
like a cosmic magnifying glass.
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.
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.
The doomed
galaxies would have been pulled apart
like taffy if they plunged through the center of the
galaxy cluster where gravitational tidal forces are strongest.
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.
It might not be measurable on local scales,
like here in the solar system, or in any matter - strewn environs, such as
galaxy clusters.
«The region around the Milky Way should look
like the Coma
cluster,» Kochanek says, referring to a famous, dense grouping of
galaxies.
A spheroidal ring projection would mirror the strings of
clusters of
galaxies seen to surround voids in the universe; voids and string -
like formations are seen and predicted by many models of the cosmos.
In terms of mass they lie between the more commonly found stellar - mass and supermassive types of black hole [3], and could tell us about how black holes grow and evolve within
clusters like Messier 15, and within
galaxies.
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.
If they are connected gravitationally, then they will eventually form the core of a massive
cluster of galaxies like the nearby Virgo Cluster, which boasts 2000 m
cluster of
galaxies like the nearby Virgo
Cluster, which boasts 2000 m
Cluster, which boasts 2000 members.
Known as an ultra-compact dwarf, this type of system has up to a billion stars and can be similar in mass to a
galaxy, but it is compact and looks more
like a star
cluster.
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.
«High - energy neutrinos are produced along with gamma rays by extremely high - energy radiation known as cosmic rays in objects
like star - forming
galaxies,
galaxy clusters, supermassive black holes, or gamma - ray bursts.
The lens could lie within or nearby the
galaxy, and could be a collection of thousands of stars
like a globular
cluster.
Photographer Robert Franke
likes the left - to - right flow and variety of
galaxies in this view of the massive
cluster 250 million light - years away.
And massive
clusters of
galaxies ought to be strung along filaments of dark matter,
like pearls on a chain.
Open
clusters like NGC 2367 are a common sight in spiral
galaxies like the Milky Way, and tend to form in their host's outer regions.
Faint objects
like galaxies and globular
clusters are clear to the naked eye from here; the night I visited, the night sky was bright enough to read by, the Milky Way was lit up
like a celestial highway and faint meteors continually peppered the heavens.
Gravitational lenses form when an intervening massive object,
like a
galaxy or
galaxy cluster, bends the light from more distant
galaxies.
«Rich groups of
galaxies like the Coma
Cluster are very, very rare, but there are quite a few
galaxies the size of NGC 1600 that reside in average - size
galaxy groups,» Ma said.
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.
Astronomers have long known that at the largest scale, the universe looks
like sea - foam:
clusters of
galaxies surrounding large, empty bubbles.
It was once possible to confuse faint dwarf
galaxies like Segue 2 with globular
clusters — tightly bound clumps of stars that are also known to orbit larger
galaxies like the Milky Way.
Small
galaxy groups are about 1000 times more common than large
clusters, so there should be many more Bullet -
like groups.
Astronomers think that
galaxies grow from scraggly
clusters of stars to elegant spirals
like the Milky Way by merging and pooling their resources.
The
cluster is so massive that it magnifies the light from faraway
galaxies behind it due to a phenomenon called gravitational lensing, where the curvature of space acts
like a giant funhouse mirror to stretch and brighten distant objects.
An image taken with the Hubble Space Telescope of Abell 1689, a massive
cluster of
galaxies whose gravitational pull is so strong that it bends light, acting
like a lens.
Both the
galaxy and the
galaxy cluster are acting
like a giant «cosmic lens,» bending and magnifying light from the supernova behind it, an effect called gravitational lensing.
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.»
The dark matter behavior that fits the observed
galaxy clustering best comes from dark matter made of particles that are massive and weakly interacting, meaning that they do not feel the stronger forces
like electromagnetism or the nuclear forces and respond only to gravity.
The
galaxies clump together into
clusters and the
galaxy clusters gather together into huge string -
like superclusters with big gaps (voids) in between.
The Milky Way (
like other spiral
galaxies) is surrounded by a large halo region which contains globular
clusters, large clouds of hydrogen gas, and a huge mass of the mysterious dark matter.
On Friday, NASA released an edge - on image of the lenticular
galaxy NGC 5308 with a host of star
clusters encircling it, «
like bees buzzing around a hive.»
Hubble's «eye» is so sharp that it was able to pick out the fuzzy globular
clusters, which, at that distance, look
like individual stars bunched up around the
galaxies, instead of groupings of stars.
On Friday, NASA and the European Space Agency (ESA) released an edge - on image of this lenticular
galaxy, with a host of star
clusters encircling it «
like bees buzzing around a hive.»
[16]
Like Mayall II, Omega Centauri has a range of metallicities and stellar ages that suggests that it did not all form at once (as globular
clusters are thought to form) and may in fact be the remainder of the core of a smaller
galaxy long since incorporated into the Milky Way.
The destruction of a planet may sound
like the stuff of science fiction, but a team of astronomers has found evidence that this may have happened in an ancient globular
cluster of stars at the edge of the Milky Way
galaxy.
The study's results suggest that compact
galaxies in
galaxy clusters like CL J1001 likely form their stars during brief and more violent outbursts than
galaxies that are outside such
clusters.
Imagine a swarm of bees; a
cluster of
galaxies is sort of
like that.
The properties of Terzan 5 are not
like the ones found in a globular
cluster, but they are very similar to the stellar population found in the Milky Way's galactic bulge — a tightly packed central region of the
galaxy.
AMiBA, a millimeter interferometer
like ALMA, was constructed by ASIAA (Academia Sinica Institute of Astronomy and Astrophysics) and National Taiwan University for polarimetry of microwave background radiation and detection of distant
clusters of
galaxies using the Sunyaev Zeldovich effect.