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Astronomy Picture of the Day (APOD) is a website provided by NASA and Michigan Technological University (MTU). It reads: "Each day a different image or photograph of our universe is featured, along with a brief explanation written by a professional astronomer ."
Astrometry, the science of spherical astronomy, is concerned with precise measurements of the location of celestial bodies in the celestial sphere and their kinematics relative to a reference frame on the celestial sphere. [8] In principle, astrometry can involve such measurements of planets, stars, black holes and galaxies to any celestial ...
Astrometry is a branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies. It provides the kinematics and physical origin of the Solar System and this galaxy , the Milky Way .
An online star chart; Monthly sky maps for every location on Earth Archived 2007-09-13 at the Wayback Machine; The Evening Sky Map – Free monthly star charts and calendar for northern hemisphere, southern hemisphere, and equatorial sky watchers. Sky Map Online – Free interactive star chart (showing over 1.2 million stars up to magnitude 12)
A significant expansion of the catalog, Guide Star Catalog II, was published in 2008. The Guide Star Catalog II (GSC-II) was compiled by the Catalog and Surveys branch of the Space Telescope Science Institute and the astrometry team of the Astronomical Observatory of Torino (Italy). It has entries for 945,592,683 stars, and has positions ...
Rogelio Bernal Andreo (born 9 January 1969) is a Spanish-American astrophotographer.He is known for his photographs of deep sky objects.His work has been recognized by NASA as a regular contributor to their Astronomy Picture of the Day (APOD) [1] 80 times.
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2 Astrometry parameters. 3 Cosmological parameters. 4 Distance description. 5 Galaxy comparison. 6 Luminosity comparison. 7 Mass comparison. 8 Metallicity comparison.