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

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

   1985 – Robert Antonucci and J. Miller discover that the Seyfert II galaxy NGC 1068 has broad lines which can only be seen in polarized reflected light. 1986 – Amos Yahil, David Walker, and Michael Rowan-Robinson find that the direction of the IRAS galaxy density dipole agrees with the direction of the cosmic microwave background temperature ...

3. Disc galaxy - Wikipedia

   en.wikipedia.org/wiki/Disc_galaxy

   A disc galaxy (or disk galaxy) is a galaxy characterized by a galactic disc. This is a flattened circular volume of stars that are mainly orbiting the galactic core in the same plane. [ 1 ] These galaxies may or may not include a central non-disc-like region (a galactic bulge ). [ 2 ]

4. Galactic disc - Wikipedia

   en.wikipedia.org/wiki/Galactic_disc

   The Sculptor Galaxy (NGC 253) is an example of a disc galaxy. A galactic disc (or galactic disk) is a component of disc galaxies, such as spiral galaxies like the Milky Way and lenticular galaxies. Galactic discs consist of a stellar component (composed of most of the galaxy's stars) and a gaseous component (mostly composed of cool gas and dust).

5. Galaxy formation and evolution - Wikipedia

   en.wikipedia.org/wiki/Galaxy_formation_and_evolution

   The reason is that these galaxy formation models predict a large number of mergers. If disk galaxies merge with another galaxy of comparable mass (at least 15 percent of its mass) the merger will likely destroy, or at a minimum greatly disrupt the disk, and the resulting galaxy is not expected to be a disk galaxy (see next section).

6. Category:Timeline templates - Wikipedia

   en.wikipedia.org/wiki/Category:Timeline_templates

   This is a category of templates that generate timelines. A few of them are a specific timeline used in one article context. Others are parameterizable templates, used to generate a particular type of timeline visualization, in multiple contexts.

7. Planet-forming disk spotted around star in another galaxy for ...

   www.aol.com/planet-forming-disk-spotted-around...

   The star is surrounded by a disk where planets may form. Astronomers have spotted a massive young star in a neighboring galaxy called the Large Magellanic Cloud. The star is surrounded by a disk ...