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Satellite observations. Map of stars cataloged by the Gaia release in 2021, displayed as density mesh in the diagram. The ESA spacecraft Gaia provides distance estimates by determining the parallax of a billion stars and is mapping the Milky Way with four planned releases of maps in 2016, 2018, 2021 and 2024.
The Orion Arm, also known as the Orion–Cygnus Arm, is a minor spiral arm within the Milky Way Galaxy spanning 3,500 light-years (1,100 parsecs) in width and extending roughly 10,000 light-years (3,100 parsecs) in length. [2] This galactic structure encompasses the Solar System, including Earth.
Milky Way: Local Group: L/T eff: During the outburst, the star became the second brightest star in sky, reaching an apparent magnitude of between -0.8 and -1.0. AT 2010dn: 4,130: 2010 NGC 3180: LDC 743: L/T eff: SN 2011fh: 3,980: 2011 NGC 4806: Abell 3528: L/T eff: AT 2014ej: 3,600: 2014 NGC 7552: Grus Quartet: L/T eff: V838 Monocerotis: 3,190: ...
The Nebra sky disk, a 30 cm wide bronze disk dated to 1600 BC, bears gold symbols generally interpreted as a sun or full moon, a lunar crescent, several stars including the Pleiades cluster and possibly the Milky Way. Antiquity. The oldest accurately dated star chart appeared in ancient Egyptian astronomy in 1534 BC.
[clarification needed] The Galactic Center is approximately 8 kiloparsecs (26,000 ly) away from Earth in the direction of the constellations Sagittarius, Ophiuchus, and Scorpius, where the Milky Way appears brightest, visually close to the Butterfly Cluster (M6) or the star Shaula, south to the Pipe Nebula.
The Milky Way. Population II stars are in the galactic bulge and globular clusters. Artist’s impression of a field of population III stars 100 million years after the Big Bang. Population II, or metal-poor, stars are those with relatively little of the elements heavier than helium.
