Question

the dimmer star in a two - star system passes in front of the brighter star. which phenomenon does this describe?
nebular cluster
globular cluster
wobbling binary
eclipsing binary

Explanation:

An eclipsing binary is a binary star system where one star periodically passes in front of the other from the observer's perspective, causing a periodic dimming of the total light received. A nebular cluster is a group of stars within a nebula. A globular cluster is a large, spherical collection of stars. A wobbling binary refers to a binary system where the gravitational pull causes a "wobble" in the stars' motion, not an eclipse - like phenomenon.

Answer:

eclipsing binary