Search results
Results from the WOW.Com Content Network
George Willis Ritchey image of what he called the Great Nebula in Cygnus (In modern times the Veil Nebula); taken with the two-foot reflecting telescope with 3 hours exposure at the Yerkes Observatory in 1901. The nebula was discovered on 5 September 1784 by William Herschel. He described the western end of the nebula as "Extended; passes thro ...
William Herschel proves it is a very small object, calculating it to be only 320 km in diameter, and not a planet. He proposes the name asteroid, and soon other similar bodies are being found. He proposes the name asteroid, and soon other similar bodies are being found.
NGC 2683 is an unbarred spiral galaxy discovered by William Herschel on 5 February 1788. From 1782 to 1802, and most intensively from 1783 to 1790, Herschel conducted systematic surveys in search of "deep-sky" or non-stellar objects with two 20-foot-focal-length (610 cm), 12-and-18.7-inch-aperture (30 and 47 cm) telescopes (in combination with ...
The Cygnus Loop (radio source W78, or Sharpless 103) is a large supernova remnant (SNR) in the constellation Cygnus, an emission nebula measuring nearly 3° across. [1] Some arcs of the loop, known collectively as the Veil Nebula or Cirrus Nebula, emit in the visible electromagnetic range. [1] Radio, infrared, and X-ray images reveal the ...
The William Herschel's 40-foot (12 m) telescope 1781 – Charles Messier and his assistant Pierre Méchain publish the first catalogue of 110 nebulae and star clusters , the most prominent deep-sky objects that can easily be observed from Earth's Northern Hemisphere , in order not to be confused with ordinary Solar System's comets .
1778: Antoine Lavoisier (and Joseph Priestley): discovery of oxygen leading to end of Phlogiston theory. 1781: William Herschel announces discovery of Uranus, expanding the known boundaries of the Solar System for the first time in modern history.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
The original New General Catalogue was compiled during the 1880s by John Louis Emil Dreyer using observations from William Herschel and his son John, among others.Dreyer had already published a supplement to Herschel's General Catalogue of Nebulae and Clusters (GC), [2] containing about 1,000 new objects.