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Galactic astronomy. Galactic astronomy is the study of the Milky Way galaxy and all its contents. This is in contrast to extragalactic astronomy, which is the study of everything outside our galaxy, including all other galaxies. Galactic astronomy should not be confused with galaxy formation and evolution, which is the general study of galaxies ...
1995 — First detection of small-scale structure in the cosmic microwave background. 1995 — Hubble Deep Field survey of galaxies in field 144 arc seconds across. 1998 — The 2dF Galaxy Redshift Survey maps the large-scale structure in a section of the Universe close to the Milky Way. 1998 — The Hubble Deep Field South is compiled.
Notable features. Ring galaxy. Other designations. PGC 54559, [ 1] PRC D-51 [ 1] Hoag's Object is an unusual ring galaxy in the constellation of Serpens Caput. [ 5] It is named after Arthur Hoag, who discovered it in 1950 and identified it as either a planetary nebula or a peculiar galaxy. [ 6] The galaxy has a D 25 isophotal diameter of 45.41 ...
The Magellanic Clouds ( Magellanic system[ 2][ 3] or Nubeculae Magellani[ 4]) are two irregular dwarf galaxies in the southern celestial hemisphere. Orbiting the Milky Way galaxy, these satellite galaxies are members of the Local Group. Because both show signs of a bar structure, they are often reclassified as Magellanic spiral galaxies.
The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have generated the variety of structures observed in nearby galaxies. Galaxy formation is hypothesized to ...
J1407b is a substellar object, likely unbound to any star, with a dusty circumplanetary disk or massive ring system.It was first detected by telescopes of the Super Wide Angle Search for Planets (SuperWASP) and All Sky Automated Survey (ASAS) projects in April–June 2007, when J1407b's disk eclipsed the star V1400 Centauri and caused it to undergo a series of dimming events for 56 days.
Journal homepage. Annals of Library and Information Studies is a quarterly journal in library and information studies publishing original papers, survey reports, reviews, short communications, and letters pertaining to library science, information science and computer applications in these fields. [1] It is an open access academic journal ...
This was announced as the most distant galaxy merger ever discovered. It is expected that this proto-cluster of galaxies will merge to form a brightest cluster galaxy, and become the core of a larger galaxy cluster. [147] [148] Galaxy protocluster SPT2349-56: z=4.3 (14 galaxies) This protocluster is located at 12.4 billion light years from the ...