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The Solar System is located in the Milky Way, a barred spiral galaxy with a diameter of about 100,000 light-years containing more than 100 billion stars. [269] The Sun is part of one of the Milky Way's outer spiral arms, known as the Orion–Cygnus Arm or Local Spur.
The Milky Way [c] is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.
Our own galaxy, the Milky Way, is a large disk-shaped barred-spiral galaxy [92] about 30 kiloparsecs in diameter and a kiloparsec thick. It contains about two hundred billion (2×10 11 ) [ 93 ] stars and has a total mass of about six hundred billion (6×10 11 ) times the mass of the Sun. [ 94 ]
The Cosmic Cliffs at the edge of NGC 3324, one of the first images taken by the James Webb Space Telescope. The Carina Nebula [7] or Eta Carinae Nebula [8] (catalogued as NGC 3372; also known as the Great Carina Nebula [9]) is a large, complex area of bright and dark nebulosity in the constellation Carina, located in the Carina–Sagittarius Arm of the Milky Way galaxy.
So, they put their best numbers and uncertainties to the test, running calculations for a two-body system (just the Milky Way and Andromeda), three-body systems (the Milky Way, Andromeda, and ...
Galactic astronomy – deals with the structure and components of our Galaxy and of other galaxies. High energy astrophysics – studies phenomena occurring at high energies including active galactic nuclei, supernovae, gamma-ray bursts, quasars, and shocks. Interstellar astrophysics – study of the interstellar medium, intergalactic medium ...
Milky Way Galaxy: 30,000 pc 9.26×10 17: Our home galaxy, composed of 200 billion to 400 billion stars and filled with the interstellar medium. [36] [37] Milky Way subgroup: 840,500 pc 2.59×10 19: The Milky Way and those satellite dwarf galaxies gravitationally bound to it. Examples include the Sagittarius Dwarf, the Ursa Minor Dwarf and the ...
There could be planets around the supermassive black hole at the heart of our galaxy – and we may be ready to find them, scientists say. The finding not only sheds light on such stars, and how ...
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