Definitions

1. noun

A star with a variable luminosity, especially one that varies in brightness due to a change in the amount of material it is surrounded by.

“The astronomers studied the amphiaster and found that its brightness changed significantly over time.”

2. noun

In astronomy, a star with an irregular or variable light curve, often resulting from mass transfer in a binary system.

“The team of researchers observed the amphiaster and noticed its unusual brightness patterns.”