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  2. Galaxy groups and clusters - Wikipedia

    en.wikipedia.org/wiki/Galaxy_groups_and_clusters

    MACS J0152.5-2852 is a massive galaxy cluster. Almost every pixel seen in the image is a galaxy, each containing billions of stars. [1]Galaxy groups and clusters are the largest known gravitationally bound objects to have arisen thus far in the process of cosmic structure formation. [2]

  3. Star cluster - Wikipedia

    en.wikipedia.org/wiki/Star_cluster

    Star clusters are important in many areas of astronomy. The reason behind this is that almost all the stars in old clusters were born at roughly the same time. [15] Various properties of all the stars in a cluster are a function only of mass, and so stellar evolution theories rely on observations of open and globular clusters.

  4. List of galaxy groups and clusters - Wikipedia

    en.wikipedia.org/wiki/List_of_galaxy_groups_and...

    This was the first noted cluster of "nebulae" that would become galaxies. The first redshifts to galaxies in the cluster were measured in the 1910s. Galaxies were not identified as such until the 1920s. The distance to the Virgo Cluster would have to wait until the 1930s. [21] Mly represents millions of light-years, a measure of distance.

  5. How astronomers discovered 44 new stars in a distant galaxy - AOL

    www.aol.com/news/astronomers-discovered-44-stars...

    The detection of a "treasure trove" of stars was only possible because the light from the 44 new stars was magnified by a large cluster of galaxies, called Abell 370, in front of it, according to ...

  6. Galaxy cluster - Wikipedia

    en.wikipedia.org/wiki/Galaxy_cluster

    Composite image of five galaxies clustered together just 600 million years after the Universe's birth [1]. A galaxy cluster, or a cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity, [1] with typical masses ranging from 10 14 to 10 15 solar masses.

  7. Webb telescope spots record number of stars in distant galaxy

    www.aol.com/news/webb-telescope-spots-record...

    NASA's powerful Webb Telescope has spotted more than 40 ancient stars in a distant galaxy, researchers said in a new study. ... Arc," a part of the Abell 370 galaxy cluster. The arc is about 6.5 ...

  8. Galaxy - Wikipedia

    en.wikipedia.org/wiki/Galaxy

    Star formation rates in galaxies depend upon their local environment. Isolated 'void' galaxies have highest rate per stellar mass, with 'field' galaxies associated with spiral galaxies having lower rates and galaxies in dense cluster having the lowest rates. [200] The evolution of galaxies can be significantly affected by interactions and ...

  9. Timeline of knowledge about galaxies, clusters of galaxies ...

    en.wikipedia.org/wiki/Timeline_of_knowledge...

    5th century BC — Democritus proposes that the bright band in the night sky known as the Milky Way might consist of stars. 4th century BC — Aristotle believes the Milky Way to be caused by "the ignition of the fiery exhalation of some stars which were large, numerous and close together" and that the "ignition takes place in the upper part of the atmosphere, in the region of the world which ...