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Active. 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." [1] The photograph does not necessarily correspond to a celestial event on ...
NGC 7331 Group is a visual grouping of galaxies in the constellation Pegasus. Spiral galaxy NGC 7331 is a foreground galaxy in the same field as the collection, which is also called the Deer Lick Group. [1] It contains four other members, affectionately referred to as the "fleas": the lenticular or unbarred spirals NGC 7335 and NGC 7336, the ...
SN 1006. SN 1006 was a supernova that is likely the brightest observed stellar event in recorded history, reaching an estimated −7.5 visual magnitude, [3] and exceeding roughly sixteen times the brightness of Venus. Appearing between April 30 and May 1, 1006, in the constellation of Lupus, this "guest star" was described by observers across ...
NGC 891 (also known as Caldwell 23, the Silver Sliver Galaxy, and the Outer Limits Galaxy) is an edge-on unbarred spiral galaxy about 30 million light-years away in the constellation Andromeda. It was discovered by William Herschel on October 6, 1784. [3] The galaxy is a member of the NGC 1023 group of galaxies in the Local Supercluster.
Robert Gendler. Robert Gendler (born September 30, 1957) is an American physician, amateur astronomer, author and astrophotographer. [1] He has used CCD cameras since starting out in astrophotography and specializes in images of deep sky objects with very long exposure times. His photographs are regularly published in astronomy magazines ...
Astrophotography is a popular hobby among photographers and amateur astronomers. Techniques ranges from basic film and digital cameras on tripods up to methods and equipment geared toward advanced imaging. Amateur astronomers and amateur telescope makers also use homemade equipment and modified devices.
His images and techniques have been featured in Astronomy Magazine, Sky & Telescope, National Geographic, Scientific American and L'Astronomie. Many have been used by space-based observatories as references for ground-based broadband images of objects. NASA has used Block's images over 100 times as Astronomy Picture of the Day.
Messier 94. Messier 94 (also known as NGC 4736, Cat's Eye Galaxy, Crocodile Eye Galaxy, or Croc's Eye Galaxy[7][8]) is a spiral galaxy in the mid- northern constellation Canes Venatici. It was discovered by Pierre Méchain in 1781, [9] and catalogued by Charles Messier two days later. Although some references describe M94 as a barred spiral ...