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A-type star In the Harvard spectral classification system, a class of main-sequence star having spectra dominated by Balmer absorption lines of hydrogen. Stars of spectral class A are typically blue-white or white in color, measure between 1.4 and 2.1 times the mass of the Sun, and have surface temperatures of 7,600–10,000 kelvin.
In 2016, the International Astronomical Union (IAU) organized a Working Group on Star Names (WGSN) [2] to catalog and standardize proper names for stars. The WGSN's first bulletin, dated July 2016, [3] included a table of 125 stars comprising the first two batches of names approved by the WGSN (on 30 June and 20 July 2016) together with names of stars adopted by the IAU Executive Committee ...
Hand of cards during a game. The following is a glossary of terms used in card games.Besides the terms listed here, there are thousands of common and uncommon slang terms. Terms in this glossary should not be game-specific (e.g. specific to bridge, hearts, poker or rummy), but apply to a wide range of card games played with non-proprietary pac
The related ending -ean, from an e in the root plus a suffix -an, has traditionally been stressed (that is, / ˈ iː ə n /) if the e is long ē in Latin (or is from η ē in Greek); but if the e is short in Latin, the suffix is pronounced the same as -ian.
A black hole (artist concept); Vela Pulsar, a rotating neutron star; M80, a globular cluster, and the Pleiades, an open star cluster; The Whirlpool Galaxy and Abell 2744, a galaxy cluster; Superclusters, galactic filaments and voids
The company also releases new candy heart sayings every year, each based on a central theme. This year, the hearts spout words of encouragement. Read on for classic sayings from years past, plus ...
A primary star, which is brighter and typically bigger than its companion stars, is designated by a capitalized A. Its companions are labelled B, C, and so on. For example, Sirius, the brightest star in the sky, is actually a double star, consisting of the naked-eye visible Sirius A and its dim white-dwarf companion Sirius B.
The newly added stars (增 星, zēng xīng) were named as 增 一 (zēng yī, 1st added star), 增 二 (zēng èr, 2nd added star) etc. For example, γ Cephei is referred to as 少 衛 增 八 (Shào Wèi Zēng Bā, 8th Added Star of Second Imperial Guard). Some stars may have been assigned more than one name due to the inaccuracies of ...