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The Uppsala General Catalogue of Galaxies ( UGC) is a catalogue of 12,921 galaxies visible from the northern hemisphere. It was first published in 1973. [1] Dwarf galaxy UGC 1281. [2] The catalogue includes essentially all galaxies north of declination -02°30' and to a limiting diameter of 1.0 arcminute or to a limiting apparent magnitude of 14.5.
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Sharpless catalog. The Sharpless catalog is a list of 313 H II regions (emission nebulae) intended to be comprehensive north of declination −27°. (It does include some nebulae south of that declination as well.) The first edition was published in 1953 with 142 objects (Sh1), and the second and final version was published by US astronomer ...
Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. . Released in beta in November 2004, the Google Scholar index includes peer-reviewed online academic journals and books, conference papers, theses and dissertations, preprints, abstracts, technical reports, and other ...
An astronomical catalog or catalogue is a list or tabulation of astronomical objects, typically grouped together because they share a common type, morphology, origin, means of detection, or method of discovery. The oldest and largest are star catalogues.
Fick's first law relates the diffusive flux to the gradient of the concentration. It postulates that the flux goes from regions of high concentration to regions of low concentration, with a magnitude that is proportional to the concentration gradient (spatial derivative), or in simplistic terms the concept that a solute will move from a region of high concentration to a region of low ...
The federal judge presiding over the election subversion case against former President Donald Trump rejected Saturday a defense effort to dismiss the indictment on claims that he was prosecuted ...
“I don’t really plan on being quiet about this, and I think that’s the goal of the second option,” Alvarez said. The demonstrations swept public and private universities , on campuses ...