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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 ...
The normal hue of the sky during the daytime can vary from a pinkish-red to a yellow-brown “butterscotch” color; however, in the vicinity of the setting or rising sun it is blue. This is the exact opposite of the situation on Earth. [3] On Mars, Rayleigh scattering is usually a very small effect.
The Association of Lunar and Planetary Observers reports that you can expect it to be around 14.6 arcseconds in size and shine at a magnitude of -1.4, meaning it will outshine every star. (In ...
Karl Ludwig Harding, who discovered and named Juno, assigned to it the symbol of a scepter topped with a star. [ 15 ] The modern astrological form of the symbol for Vesta, ⚶, was created by Eleanor Bach, [ 16 ] who is credited with pioneering the use of the big four asteroids with the publication of her Ephemerides of the Asteroids in the ...
Overview: This week offers a blend of exciting progress and revisiting the past. With Mercury Retrograde in Leo ending on Wednesday, we have the opportunity to move forward confidently and embrace ...
Morning star, most commonly used as a name for the planet Venus when it appears in the east before sunrise See also Venus in culture; Morning star, a name for the star Sirius, which appears in the sky just before sunrise from early July to mid-September; Morning star, a (less common) name for the planet Mercury when it appears in the east ...
With destructive, combative Mars ending an 11-week retrograde this February 23, there’s at least a slight chance that some of the chaos of the past couple months will start to dissipate.