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Sagittarius A*, abbreviated as Sgr A* (/ ˈ s æ dʒ ˈ eɪ s t ɑːr / SADGE-AY-star [3]), is the supermassive black hole [4] [5] [6] at the Galactic Center of the Milky Way.Viewed from Earth, it is located near the border of the constellations Sagittarius and Scorpius, about 5.6° south of the ecliptic, [7] visually close to the Butterfly Cluster (M6) and Lambda Scorpii.
The Sagittarius A* cluster is the cluster of stars in close orbit around Sagittarius A*, the supermassive black hole at the center of the Milky Way (in the Galactic Center). The individual stars are often listed as " S-stars ", but their names and IDs are not formalized, and stars can have different numbers in different catalogues .
S2, also known as S0–2, is a star in the star cluster close to the supermassive black hole Sagittarius A* (Sgr A*), orbiting it with a period of 16.0518 years, a semi-major axis of about 970 au, and a pericenter distance of 17 light hours (18 Tm or 120 au) – an orbit with a period only about 30% longer than that of Jupiter around the Sun, but coming no closer than about four times the ...
Sgr A East is a supernova remnant (SNR) located 7 light-years from Sgr A* and spanning approximately 27 light-years in diameter, originating from an explosion between 1,000 and 10,000 years ago. [7] Though its status as a SNR was initially debated [ 7 ] , the observed abundance of heavier elements, such as a higher ratio of Mn/Fe and Ni/Fe ...
The rotation axis of the Earth describes over a period of about 25,800 years a small circle (blue) among the stars, centred on the ecliptic northpole (blue E) and with an angular radius of about 23.4°: the angle known as the obliquity of the ecliptic. The orange axis was the Earth's rotation axis 5000 years ago when it pointed to the star Thuban.
The dates the Sun passes through the 12 astronomical constellations of the ecliptic are listed below, accurate to the year 2011. The dates will progress by an increment of one day every 70.5 years. The corresponding tropical and sidereal dates are given as well.
A Sagittarius-Sagittarius friendship is full of fun. These two love to party and share adventures. This duo will thrive in social settings so make sure to invite them to the party — any party.
It is expected to end its life into a 0.7 M ☉ white dwarf, around 700 million years in the future. [6] Based upon data obtained by the Hipparcos mission, Zeta Sagittarii was predicted to be the brightest star in the night sky around 1.2 million years ago, peaking with an apparent magnitude of −2.74. [17]