Answer:
eclipsing binary star system
Explanation:
The eclipsing timing method is one of the indirect methods Astronomers use to detect extrasolar planets. Eclipsing binary star system is detected from the drop in luminosity as one star passes in front of the other. The orbit plane of the two stars lies so nearly in the line, when viewed from Earth.
Thus, A binary star system that is detected from the drop in luminosity as one star passes in front of the other is called eclipsing binary star system.
