spiral galaxy


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spiral galaxy
Messier 81

spiral galaxy

n.
A galaxy consisting of a rotating flattened disk with a central bulge made up mostly of old stars, from which extend two or more spiral arms made up mostly of younger stars and large amounts of interstellar gas and dust.

spiral galaxy

n
(Astronomy) a galaxy consisting of an ellipsoidal nucleus of old stars from opposite sides of which arms, containing younger stars, spiral outwards around the nucleus. In a barred spiral, the arms originate at the ends of a bar-shaped nucleus

spi′ral gal′axy


n.
a galaxy having a spiral structure. Compare elliptical galaxy.
[1910–15]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.spiral galaxy - a galaxy having a spiral structurespiral galaxy - a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center
extragalactic nebula, galaxy - (astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust; "`extragalactic nebula' is a former name for `galaxy'"
Andromeda galaxy - a spiral galaxy in the constellation of Andromeda that is visible to the naked eye
Translations
kierteisgalaksi
galassia spirale
References in periodicals archive ?
TEHRAN (FNA)- Astronomers measured the mass of the supermassive black hole at the center of NGC 1097 -- a barred spiral galaxy located approximately 45 million light-years away in the direction of the constellation Fornax.
Using the European Southern Observatory's MUSE instrument, the Durham University-led research team captured images of the spiral galaxy - known as ESO137--001 - which lies 200 million light years from Earth.
WASHINGTON (CyHAN)- NGC 4258, also known as Messier 106, is a spiral galaxy like the Milky Way.
Scientists revealed that the object behind the cosmic lens is a tiny spiral galaxy undergoing a rapid burst of star formation and its light has taken 10.
html) NGC 5010 is currently transitioning from a spiral galaxy to an elliptical galaxy.
7, 2013 /PRNewswire-USNewswire/ -- NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR, set its X-ray eyes on a spiral galaxy and caught the brilliant glow of two black holes lurking inside.
Like our own spiral galaxy, these two galaxies also have relatively large and nearby companions.
A Hubble Space Telescope view of the barred spiral galaxy NGC 1672 - where did the stars come from?
It was long thought to have four main bands of stars spinning from its center, but a new model shows that two of these arms dominate the spiral galaxy.
He added: "While studying a supernova in a spiral galaxy 90 million light years away, a Nasa satellite witnessed a very rare burst of X-rays.
He discovered that the gas clouds lined up along spiral arms, indicating that we live in a spiral galaxy.
This dynamics has explained the bore hole anomaly, spiral galaxy flat rotation speeds, the masses of black holes in spherical galaxies, gravitational light bending and lensing, all without invoking "dark matter", and also the supernova redshift data without the need for "dark energy".