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Andromeda Galaxy

(Encyclopedia)Andromeda Galaxy, cataloged as M31 and NGC 224, the closest large galaxy to the Milky Way and the only one visible to the naked eye in the Northern Hemisphere. It is also known as the Great Nebula in ...

Coalsack

(Encyclopedia)Coalsack: see Milky Way.

galactic coordinate system

(Encyclopedia)galactic coordinate system, astronomical coordinate system in which the principal axis is the galactic equator (the intersection of the plane of the Milky Way with the celestial sphere) and the refere...

Ghez, Andrea Mia

(Encyclopedia)Ghez, Andrea Mia, 1965–, American astrophysicist, b. New York City, Ph.D. California Institute of Technology, 1992. She has been on the faculty at the Univ. of California, Los Angeles, since 1994. G...

Half-Way Covenant

(Encyclopedia)Half-Way Covenant, a doctrinal decision of the Congregational churches in New England. The first generation of Congregationalists had decided that only adults with personal experience of conversion we...

Kendall, Henry Way

(Encyclopedia)Kendall, Henry Way, 1926–99, American physicist. A professor at the Massachusetts Institute of Technology, Kendall won the 1990 Nobel Prize in Physics with Jerome Friedman and Richard Taylor for a s...

right of way

(Encyclopedia)right of way, in land and air traffic and in sea navigation, rules that determine precedence in the use of traffic lanes. The rules are framed in the simplest possible terms and with nearly absolute u...

Jansky, Karl Guthe

(Encyclopedia)Jansky, Karl Guthe, 1905–50, American radio engineer; b. Norman, Okla. After graduating (1927) from the Univ. of Wisconson, he joined the Bell Telephone Laboratories. While trying to determine the c...

galaxy

(Encyclopedia)CE5 Hubble classification of galaxies: Elliptical galaxies (E) are classified according to the degree of flattening of the ellipse. Spiral galaxies (S) and barred spiral galaxies (SB) are classifie...

star cluster

(Encyclopedia)star cluster, a group of stars near each other in space and resembling each other in certain characteristics that suggest a common origin for the group. Stars in the same cluster move at the same rate...