Andromeda IX (And 9) is a dwarf spheroidal

satellite A satellite or an artificial satellite is an object, typically a spacecraft, placed into orbit around a celestial body. They have a variety of uses, including communication relay, weather forecasting, navigation ( GPS), broadcasting, scient ...

of the

Andromeda Galaxy The Andromeda Galaxy is a barred spiral galaxy and is the nearest major galaxy to the Milky Way. It was originally named the Andromeda Nebula and is cataloged as Messier 31, M31, and NGC 224. Andromeda has a Galaxy#Isophotal diameter, D25 isop ...

. It was discovered in 2004 by resolved stellar photometry from the Sloan Digital Sky Survey (SDSS), by Zucker et al. (2004). At the time of its discovery, it was the galaxy with the lowest known surface brightness, Σ_''V'' ≃ 26.8mags arcsec⁻² and the faintest galaxy known from its intrinsic absolute brightness. It was found from data acquired within an SDSS scan along the major axis of M31, on October 5, 2002. Its distance was estimated to be almost exactly the same as that of M31 by McConnacrchie et al. (2005).

Star formation Star formation is the process by which dense regions within molecular clouds in interstellar space—sometimes referred to as "stellar nurseries" or "star-forming regions"—Jeans instability, collapse and form stars. As a branch of astronomy, sta ...

history and dust production in Andromeda IX, as the closest satellite to M31, have also been investigated by Abdollahi et al. (2023).

References

External links

SEDS webpage for Andromeda IX
{{DEFAULTSORT:Andromeda 09 Dwarf spheroidal galaxies 4689222 Local Group Andromeda Subgroup Andromeda (constellation) Astronomical objects discovered in 2002

See also

References

External links