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An astronomer is a scientist in the field of astronomy who focuses on a specific question or field outside the scope of Earth. Astronomers observe astronomical objects, such as stars, planets, moons, comets and galaxies – in either observational or theoretical astronomy. Examples of topics or fields astronomers study include planetary science, solar astronomy, the origin or evolution of stars, or the formation of galaxies. A related but distinct subject is physical cosmology, which studies the Universe as a whole.
Amateur astronomy is a hobby where participants enjoy observing or imaging celestial objects in the sky using the unaided eye, binoculars, or telescopes. Even though scientific research may not be their primary goal, some amateur astronomers make contributions in doing citizen science, such as by monitoring variable stars, double stars, sunspots, or occultations of stars by the Moon or asteroids, or by discovering transient astronomical events, such as comets, galactic novae or supernovae in other galaxies.
Microscopium is a minor constellation in the southern celestial hemisphere, one of twelve created in the 18th century by French astronomer Nicolas-Louis de Lacaille and one of several depicting scientific instruments. The name is a Latinised form of the Greek word for microscope. Its stars are faint and hardly visible from most of the non-tropical Northern Hemisphere.
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets. Relevant phenomena include supernova explosions, gamma ray bursts, quasars, blazars, pulsars, and cosmic microwave background radiation. More generally, astronomy studies everything that originates beyond Earth's atmosphere. Cosmology is a branch of astronomy that studies the universe as a whole.
Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies. The first detection of radio waves from an astronomical object was in 1933, when Karl Jansky at Bell Telephone Laboratories reported radiation coming from the Milky Way. Subsequent observations have identified a number of different sources of radio emission. These include stars and galaxies, as well as entirely new classes of objects, such as radio galaxies, quasars, pulsars, and masers. The discovery of the cosmic microwave background radiation, regarded as evidence for the Big Bang theory, was made through radio astronomy.
Vulpecula is a faint constellation in the northern sky. Its name is Latin for "little fox", although it is commonly known simply as the fox. It was identified in the seventeenth century, and is located in the middle of the Summer Triangle.
Astrophysics is a science that employs the methods and principles of physics and chemistry in the study of astronomical objects and phenomena. As one of the founders of the discipline, James Keeler, said, astrophysics "seeks to ascertain the nature of the heavenly bodies, rather than their positions or motions in space–what they are, rather than where they are", which is studied in celestial mechanics.
Observational astronomy is a division of astronomy that is concerned with recording data about the observable universe, in contrast with theoretical astronomy, which is mainly concerned with calculating the measurable implications of physical models. It is the practice and study of observing celestial objects with the use of telescopes and other astronomical instruments.
Robert Burnham Jr. was an American astronomer, best known for writing the classic three-volume Burnham's Celestial Handbook. He discovered numerous asteroids, including the Mars crossing asteroid 3397 Leyla, and six comets.
Observational cosmology is the study of the structure, the evolution and the origin of the universe through observation, using instruments such as telescopes and cosmic ray detectors.
A deep-sky object (DSO) is any astronomical object that is not an individual star or Solar System object. The classification is used for the most part by amateur astronomers to denote visually observed faint naked eye and telescopic objects such as star clusters, nebulae and galaxies. This distinction is practical and technical, implying a variety of instruments and techniques appropriate to observation, and does not distinguish the nature of the object itself.
Terence Dickinson was a Canadian amateur astronomer and astrophotographer who lived near Yarker, Ontario, Canada. He was the author of 14 astronomy books for both adults and children. He was the founder and former editor of SkyNews magazine. Dickinson had been an astronomy commentator for Discovery Channel Canada and taught at St. Lawrence College. He made appearances at such places as the Ontario Science Centre. In 1994, the International Astronomical Union committee on Minor Planet Nomenclature named asteroid 5272 Dickinson in honour of his "ability to explain the universe in everyday language".
The Oregon Star Party (OSP) was founded in 1987 and is considered one of the best annual events in the United States for observational astronomy. The Oregon Star Party takes place in the Ochoco National Forest, near the geographical center of the state of Oregon. It is far enough from population centers to provide some of the darkest skies in North America. The area's 5,000-foot (1,500 m) altitude contributes to steady seeing, which frequently provides near ideal observational conditions. The OSP site also has a treeless field of view providing an unobstructed 360 degree horizon.
Astronomy is a monthly American magazine about astronomy. Targeting amateur astronomers, it contains columns on sky viewing, reader-submitted astrophotographs, and articles on astronomy and astrophysics for general readers.
Visible-light astronomy encompasses a wide variety of astronomical observation via telescopes that are sensitive in the range of visible light. Visible-light astronomy is part of optical astronomy, and differs from astronomies based on invisible types of light in the electromagnetic radiation spectrum, such as radio waves, infrared waves, ultraviolet waves, X-ray waves and gamma-ray waves. Visible light ranges from 380 to 750 nanometers in wavelength.
Colin Alistair Ronan FRAS was a British author and specialist in the history and philosophy of science.
Astronomy Now is a monthly British magazine on astronomy and space. According to the Royal Astronomical Society, Astronomy Now is the "principal amateur astronomy magazine in Britain" with a reputed circulation of 24,000.
IC 2177 is a region of nebulosity that lies along the border between the constellations Monoceros and Canis Major. It is a roughly circular H II region centered on the Be star HD 53367. This nebula was discovered by Welsh amateur astronomer Isaac Roberts and was described by him as "pretty bright, extremely large, irregularly round, very diffuse."
V339 Delphini or Nova Delphini 2013 (PNV J20233073+2046041) is a bright nova star in the constellation Delphinus. It was discovered on 14 August 2013 by amateur astronomer Koichi Itagaki in Japan and confirmed by the Liverpool Telescope on La Palma. The nova appeared with a magnitude 6.8 when it was discovered and peaked at magnitude 4.3 on 16 August 2013. A nova is produced by the fusion of accumulated material on the white dwarf nova progenitor acquired from its companion star. The nova system is thus a binary star, and a classical nova. The white dwarf is a carbon-oxygen white dwarf, with an estimated mass of 1.04±0.02 M☉. There is not yet a consensus about what the binary's orbital period is; estimates range from 3.15 hours to 6.43 hours.
Paul Geoffrey Murdin is a British astronomer. He identified the first clear candidate for a black hole, Cygnus X-1, with his colleague Louise Webster.
References
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- 1 2 "James Muirden". Open Library. Retrieved 27 April 2019.
- 1 2 "Kirkus Review of The Amateur Astronomer's Handbook". Kirkus Reviews. Retrieved 27 April 2019.
- ↑ Woolfson, M. M. (1964). "Reviewed Work: Astronomy with binoculars by James Muirden". Science Progress (1933-). 52 (205): 140. JSTOR 43418923.
- 1 2 Krull, Ulrich J. (1983). "Review of Publications: Amateur Astronomer's Handbook and Observational Astronomy for Amateurs". Journal of the Royal Astronomical Society of Canada. 77: 163–164. Bibcode:1983JRASC..77R.163K.
- ↑ Gray, M. A. (1976). "Book Review: Beginner's Guide to Astronomical Telescope Making". Monthly Notes of the Astronomical Society of South Africa. 35: 46. Bibcode:1976MNSSA..35...46G.
- ↑ Beet, E. A. (1982). "Reviews: Observational Astronomy for Amateurs". Journal of the British Astronomical Association. 92: 252–253. Bibcode:1982JBAA...92..252S.
- ↑ Chown, Marcus (7 November 1985). "Review: A crick in the neck and a squint". New Scientist. Vol. 108, no. 1481. p. 57. ISSN 0262-4079 . Retrieved 27 April 2019.
- ↑ Ottinger III, John (30 July 2007). "Book Review: A Rhyming History of Britain by James Muirden". Grasping for the Wind. Retrieved 27 April 2019.
- ↑ "Listen Again - Today's Running Order". BBC Radio 4. 9 October 2003. Retrieved 27 April 2019.
- ↑ "Nonfiction Book Review: The Cosmic Verses: A Rhyming History of the Universe". Publishers Weekly. 6 November 2006. Retrieved 27 April 2019.
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