An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

Same as → angular distance.

→ angular; → separation.

The difference in → right ascension between the → Sun and the → Moon, measured in degrees.

→ arc; → separation.

The physical processes that can cause certain elements to migrate in a → stellar atmosphere. These processes are thought to be important in creating the chemical peculiarities seen in → Am stars and → Ap stars.

→ chemical; → separation.

General: The act or process of separating. The place at which a division or parting occurs.
Astro.: The angular distance between the two components of a visual binary or optical double star.

M.E., from O.Fr. separation, from L. separationem, from separare "to pull apart," from se- "apart" + parare "make ready, prepare."

Jodâyi state noun of jodâ "separate," from Mid.Pers. yut "separate, different;" Av. yuta- "separate, apart."

The energy required to remove a particle (a proton or a neutron) from a particular atomic nucleus.

→ separation; → energy.