simple past tense and past participle of brighten up

Third-person singular simple present indicative form of brighten up

present participle of brighten up

(physics, astronomy) Of a star, specifically its poles: brighter due to gravity brightening.

Alternative form of gravity brightening

(physics, astronomy) Brightened by limb brightening.

Alternative form of limb brightening

(physics, astronomy) The optical effect where, when certain wavelengths (not in the spectrum of visible light) are examined, the edge of the disk of a star appears brighter than the center of the disk.

Synonym of gravity darkening

Alternative form of limb-brightened