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General astronomy
Industry: Astronomy
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General astronomy
axis
Astronomy; General astronomy
Theoretical straight line through a celestial body, around which it rotates.
axisymmetric collapse
Astronomy; General astronomy
Collapse of mass in such a way that the mass maintains the symmetry of a cylinder.
artificial satellite
Astronomy; General astronomy
a satellite made by humans which is gravitationaly bound and in orbit of a larger physical object
ascending node
Astronomy; General astronomy
In the orbit of a solar-system body, the point where the body crosses the ecliptic from south to north: for a star, out of the plane of the sky toward the observer.
aspheric
Astronomy; General astronomy
An optical surface with departures in shape from a perfect sphere in order to cancel optical imperfections or aberrations.
association
Astronomy; General astronomy
A sparsely populated grouping (mass range 102-103 Msun) of very young, massive stars lying along a spiral arm of the Milky Way, whose spectral types or motions in the sky indicate a common origin. ...
