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Delta Canis Minoris
The Bayer designation Delta Canis Minoris (δ CMi / δ Canis Minoris) is shared by three stars in the constellation Canis Minor Canis Minor is a small constellation in the northern celestial hemisphere. In the second century, it was included as an asterism, or pattern, of two stars in Ptolemy's 48 constellations, and it is counted among the 88 modern constellation ...: * δ1 Canis Minoris * δ2 Canis Minoris * δ3 Canis Minoris {{SIA , astronomical objects Canis Minoris, Delta Canis Minor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bayer Designation
A Bayer designation is a stellar designation in which a specific star is identified by a Greek or Latin letter followed by the genitive form of its parent constellation's Latin name. The original list of Bayer designations contained 1,564 stars. The brighter stars were assigned their first systematic names by the German astronomer Johann Bayer in 1603, in his star atlas ''Uranometria''. Bayer catalogued only a few stars too far south to be seen from Germany, but later astronomers (including Nicolas-Louis de Lacaille and Benjamin Apthorp Gould) supplemented Bayer's catalog with entries for southern constellations. Scheme Bayer assigned a lowercase Greek letter (alpha (α), beta (β), gamma (γ), etc.) or a Latin letter (A, b, c, etc.) to each star he catalogued, combined with the Latin name of the star's parent constellation in genitive (possessive) form. The constellation name is frequently abbreviated to a standard three-letter form. For example, Aldebaran in the constellation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Star
A star is an astronomical object comprising a luminous spheroid of plasma (physics), plasma held together by its gravity. The List of nearest stars and brown dwarfs, nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night sky, night, but their immense distances from Earth make them appear as fixed stars, fixed points of light. The most prominent stars have been categorised into constellations and asterism (astronomy), asterisms, and many of the brightest stars have proper names. Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations. The observable universe contains an estimated to stars. Only about 4,000 of these stars are visible to the naked eye, all within the Milky Way galaxy. A star's life star formation, begins with the gravitational collapse of a gaseous nebula of material composed primarily of hydrogen, along with helium and trace amounts of heavier elements. Its stellar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The origins of the earliest constellations likely go back to prehistory. People used them to relate stories of their beliefs, experiences, creation myth, creation, or mythology. Different cultures and countries adopted their own constellations, some of which lasted into the early 20th century before today's constellations were internationally recognized. The recognition of constellations has changed significantly over time. Many changed in size or shape. Some became popular, only to drop into obscurity. Some were limited to a single culture or nation. The 48 traditional Western constellations are Greek. They are given in Aratus' work ''Phenomena'' and Ptolemy's ''Almagest'', though their origin probably predates these works by several centuries. Constellation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canis Minor
Canis Minor is a small constellation in the northern celestial hemisphere. In the second century, it was included as an asterism, or pattern, of two stars in Ptolemy's 48 constellations, and it is counted among the 88 modern constellations. Its name is Latin for "lesser dog", in contrast to Canis Major, the "greater dog"; both figures are commonly represented as following the constellation of Orion the hunter. Canis Minor contains only two stars brighter than the fourth magnitude, Procyon (Alpha Canis Minoris), with a magnitude of 0.34, and Gomeisa (Beta Canis Minoris), with a magnitude of 2.9. The constellation's dimmer stars were noted by Johann Bayer, who named eight stars including Alpha and Beta, and John Flamsteed, who numbered fourteen. Procyon is the eighth- brightest star in the night sky, as well as one of the closest. A yellow-white main sequence star, it has a white dwarf companion. Gomeisa is a blue-white main sequence star. Luyten's Star is a ninth-mag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delta1 Canis Minoris
Delta1 Canis Minoris, Latinized from δ1 Canis Minoris, is a solitary, yellow-white hued star in the constellation Canis Minor. It is faintly visible to the naked eye with an apparent visual magnitude of +5.25. Based upon an annual parallax shift of 4.29 mas as seen from Earth, this star is located roughly 760 light years from the Sun. Houk and Swift (1999) list a stellar classification of F0 V for Delta1 Canis Minoris, indicating it is an F-type main-sequence star. However, Cowley et al. (1969) gave it a class of F0 III, which would suggest it is instead an evolved giant star. The spectrum displays a higher than solar metallicity – a term indicating the abundance of elements other than hydrogen and helium compared to the Sun. The star is spinning with a projected rotational velocity of 50 km/s and is radiating 319 times the Sun's luminosity from its photosphere at an effective temperature The effective temperature of a body such as a star or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delta2 Canis Minoris
Delta2 Canis Minoris (δ2 CMi, δ2 Canis Minoris) is a main-sequence star in the constellation Canis Minor, about away. Astronomic findings The star figures from our part of the galaxy as the more central of three that share the Delta designation (the greek-lettered catalog is that of Johann Bayer's 1603 ''Uranometria'' atlas of bright stars) in star atlases very close, southwest of Delta3 Canis Minoris which is physically unrelated. The Flamsteed designation for this star is 8 Canis Minoris in John Flamsteed's 1712 star catalog. As of 2008, no companion has been suspected or found orbiting δ2 Canis Minoris. The apparent magnitude of 5.589 means it is deemed visible to the naked eye but faint and requires a dark sky to view. Based on parallax measurements it is calculated to be distant from the Earth. This star is rotating rapidly; the projected rotational velocity is 117.6 km/s, which means that the equator of this star is rotating at this velocity or gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delta3 Canis Minoris
Delta3 Canis Minoris, Latinized from δ3 Canis Minoris, is a solitary, white-hued star in the equatorial constellation of Canis Minor. Based upon a parallax of as seen from Gaia spacecraft in its repeated orbits around the sun, just beyond the earth this star is about 730 light years from the solar system. At that distance, the visual magnitude of these stars is diminished by an extinction of more than 0.15 due to interstellar dust. With an apparent visual magnitude of +5.81, it is just bright enough to be faintly visible to the naked eye. This is a B-type main-sequence star with a stellar classification of B9 V. It is about of the way through its main sequence lifetime and is spinning rapidly with a projected rotational velocity of 259 km/s. The star has an estimated 3.16 times the mass of the Sun and about 2.1 times the Sun's radius. It is radiating 175 times the Sun's luminosity from its photosphere at an effective temperature The effective temper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bayer Objects
Bayer AG (, commonly pronounced ; ) is a German multinational pharmaceutical and biotechnology company and one of the largest pharmaceutical companies in the world. Headquartered in Leverkusen, Bayer's areas of business include pharmaceuticals; consumer healthcare products, agricultural chemicals, seeds and biotechnology products. The company is a component of the Euro Stoxx 50 stock market index. Bayer was founded in 1863 in Barmen as a partnership between dye salesman Friedrich Bayer and dyer Friedrich Weskott. As was common in this era, the company was established as a dyestuffs producer. The versatility of aniline chemistry led Bayer to expand their business into other areas, and in 1899 Bayer launched the compound acetylsalicylic acid under the trademarked name Aspirin. In 1904 Bayer received a trademark for the "Bayer Cross" logo, which was subsequently stamped onto each aspirin tablet, creating an iconic product that is still sold by Bayer. Other commonly known produ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
