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physical object > natural object > celestial body > collection of stars > galaxy > spiral galaxy > Sb spiral

Sb spiral
subject			fact

Sb spiral	is a kind of spiral galaxy
	has definition Spiral galaxy with arms spread out from the nucleus.
spiral galaxy	has classification criterion Subdivided according to the openness of the spiral arms as Sa spiral, Sb spiral or Sc spiral.
	has mass 1010 to 1012 Msun
galaxy	has number of stars 106 to 1012
	has catalog galaxy catalog
celestial body	has spectra
physical object	has location or center of gravity
	has angular momentum
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material

Kinds of Sb spiral :

• Andromeda galaxy (13 facts) (M 31) - Major spiral galaxy, 2.2 million light-years from Earth. Gravitationally bound to the Milky Way with which it shares membership in the Local Group, it is currently approaching us, rather than receding as is the case for most galaxies., A spiral galaxy (kS5 in Morgan's classification) in the Local Group, about 650-700 kpc distant (M_V = -21), visible to the naked eye as a fuzzy patch in the constellation of Andromeda. Total mass about 3.1 × 10¹¹ M_sun ; i = 77°, heliocentric velocity - 180 km s^-1. Its nucleus exhibits noncircular gas motions. It is similar to but slightly larger than our Galaxy., The largest galaxy in the Local Group. Also known as the Great Spiral and M31. It is about one and a half times the size of our own galaxy, and contains at least 300 globular clusters. Two smaller, elliptical galaxies (M32 and NGC 205) lie close to it., The largest member of the local group. It is a giant spiral galaxy that lies 2.4 million light-years away.
• M 81 (10 facts) (NGC 3031) - A giant spiral galaxy 11 million light-years away in the constellation Ursa Major. It rules the M81 group, the second nearest galaxy group to the Local Group.