spiral galaxy


Also found in: Thesaurus, Encyclopedia, Wikipedia.
click for a larger image
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 ?
Galaxies in Lion Territory Object Type Mag(v) Size NGC 2964 Spiral galaxy 11.
M82, also called the Cigar Galaxy, is a spiral galaxy that was first considered an irregular galaxy.
ESOs Very Large Telescope (VLT) has captured a magnificent face-on view of the barred spiral galaxy Messier 77.
Whether the spiral galaxy has two arms or four, whether those arms wrap all the way around the galaxy, and even the extent of the solar system's arm are up for debate.
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.
This image made by the NASA/ESA Hubble Space Telescope shows the barred spiral galaxy NGC 1300.
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.
Washington, June 4 ( ANI ): Researchers observed million seconds of observing time with NASA's Chandra X-ray Observatory and discovered a spiral galaxy similar to the Milky Way glittering with hundreds of X-ray points of light.
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.
This image provided by NASA shows the sharpest shot yet taken of the large "grand design" spiral galaxy M81.
All wear white and either hop up and down or jog in place (one can't tell which since the troupe is revealed only from waist up) to a sound track of foot-steps and droning music in front of a backdrop depicting a spiral galaxy.