Sagittarius A* (/ ˈ eɪ s t ɑːr / AY star), abbreviated Sgr A* (/ ˈ s æ dʒ ˈ eɪ s t ɑːr / SAJ AY star) is the supermassive black hole at the Galactic Center of the Milky is located near the border of the constellations Sagittarius and Scorpius, about 5.6° south of the ecliptic, visually close to the Butterfly Cluster (M6) and Lambda Scorpii.. The object is a bright and very rxa7pAcSVS0Q The modern classification system is known as the Morgan–Kee (MK) classification. Each star is assigned a spectral class (from the older Harvard spectral ude luminosity) and a luminosity class using Roman numerals as explained below, forming the star's spectral type.. Other modern stellar classification systems, such as the UBV system, are based ck6mz4Q9pcQC Web2020 was heavily defined by the COVID-19 pandemic, which led to global social and economic disruption, mass cancellations and postponements of events, worldwide lockdowns and th the Great Depression in the 1930s. Geospatial World also called 2020 "the worst year in terms of climate change" in part due TIYbYUeFccte WebThe Sun isposed primarily of the chemical elements hydrogen and this time in the Sun's life, they account for 74.9% and 23.8%, respectively, of the mass of the Sun in the photosphere. All heavier elements, called metals in astronomy, account for less than 2% of the mass, with oxygen (roughly 1% of the Sun's mass), carbon (0.3%), neon (0.2%), and cQGQ0mTvz7YD
Get Price