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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.
Satellite galaxies that orbit from 1,000 ly (310 pc) of the edge of the disc of the Milky Way Galaxy to the edge of the dark matter halo of the Milky Way at 980,000 ly (300 kpc) from the center of the galaxy, [a] are generally depleted in hydrogen gas compared to those that orbit more distantly.
The Large Magellanic Cloud (LMC) is a dwarf galaxy and satellite galaxy of the Milky Way. At a distance of around 50 kiloparsecs (163,000 light-years), the LMC is the second- or third-closest galaxy to the Milky Way, after the Sagittarius Dwarf Spheroidal (c. 16 kiloparsecs (52,000 light-years) away) and the possible dwarf irregular galaxy ...
Satellite of Milky Way (accretion by Milky Way) 10 Reticulum II: 0.102 0.0314: −3.1: 14.4: Local Group: Satellite of Milky Way: 378 ly 11 Segue 2: dSph 0.114 0.035: −2.5: Local Group: Satellite of Milky Way, one of the smallest known galaxies 220 ly 12 Carina II: 0.122 0.0374: −4.5: 13.36: Local Group: Satellite of Milky Way
At a distance of about 200,000 light-years, the SMC is among the nearest intergalactic neighbors of the Milky Way and is one of the most distant objects visible to the naked eye. The SMC is visible from the entire Southern Hemisphere and can be fully glimpsed low above the southern horizon from latitudes south of about 15° north .
The Andromeda Galaxy is approaching the Milky Way at about 110 kilometres (68 miles) per second. [128] It has been measured approaching relative to the Sun at around 300 km/s (190 mi/s) [1] as the Sun orbits around the center of the galaxy at a speed of approximately 225 km/s (140 mi/s).
The Large Magellanic Cloud and its neighbour and relative, the Small Magellanic Cloud, are conspicuous objects in the southern hemisphere, looking like separated pieces of the Milky Way to the naked eye. Roughly 21 ° apart in the night sky, the true distance between them is roughly 75,000 light-years.
A satellite galaxy is a smaller companion galaxy that travels on bound orbits within the gravitational potential of a more massive and luminous host galaxy (also known as the primary galaxy). [1] Satellite galaxies and their constituents are bound to their host galaxy, in the same way that planets within our own solar system are gravitationally ...
Distance: 65 ± 7 kly (20 ± 2 kpc) Apparent magnitude (V) 4.5: Characteristics; Type: dSph(t) Mass: 4 × 10 8 M ☉ Apparent size (V) 450.0′ × 216.0′ Notable features: Heading for a collision with the Milky Way: Other designations; Sag DEG, Sgr dSph, Sagittarius Dwarf Spheroidal, Sgr I Dwarf, PGC 4689212
Estimates of the distance from the Milky Way to the Triangulum Galaxy range from 2,380 × 10 ^ 3 to 3,070 × 10 ^ 3 ly (730 to 940 kpc) (or 2.38 to 3.07 Mly), with most estimates since the year 2000 lying in the middle portion of this range, making it slightly more distant than the Andromeda Galaxy (at 2,540,000 light-years). At least three ...