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 as seen from Earth, causing a dimming of the combined light. A nebular cluster is a group of stars in a nebula, a globular cluster is a spherical collection of stars, and a wobbling binary refers to the motion of binary stars due to their mutual gravity rather than one passing in front of the other.

Answer:

D. eclipsing binary