A binary star system which is composed of a collapsed object (degenerate dwarf, neutron star, or black hole) in orbit with a low-mass (≤ 0.5 M_sol) secondary star, wherein the collapsed star accretes
matter from its companion. These two objects form a binary system of overall dimensions 10^6 km with an orbital period of only hours or less.
A binary star system which is composed of a collapsed object (degenerate dwarf, neutron star, or black hole) in orbit with a low-mass (≤ 0.5 M_sol) secondary star, wherein the collapsed star accretes
matter from its companion. These two objects form a binary system of overall dimensions 10^6 km with an orbital period of only hours or less.
A galaxy with no disk or nebulous background and a high surface brightness that appears only barely larger than a star-like point on a sky survey photograph.
Sea ice terminology that describes an increase in ice concentration and/or a stress which may result in ice deformation (i.e. The ice becoming warped).
Pieces of floating ice are considered to be compacting when they are subjected to a converging motion, which increases ice concentration and/or produces stresses that may result in ice deformation.