Question

Sort the following statements by the type of binary system they describe. Items (6 items) (Drag and drop into the appropriate area below) binary orbit may be viewed nearly face-on binary orbit must be seen nearly edge-on two separate stars are seen in an image looks like one constant- brightness star brightness changes repeatedly over time relies on the Doppler effect Categories Astrometric Spectroscopic Eclipsing Drag and drop here Drag and drop here Drag and drop here

Answer 1

Astrometric

1. Look like one constant - brightness star.
2. Two separate stars are seen in image

• Astrometry is a branch of astronomy , which involve precise movement and position of star.Above two is related to astrometric , thus included in astrometric category.

Spectroscopic

1. Brightness changes repeatedly over time
2. Relies on the doppler effect.

• Spectroscopy is the study of interaction of matter and radiation, hence above both is related to spectroscopy thus it included in spectroscopic category.

Eclipsing

1. Binary orbit may be viewed nearly face-on.
2. Binary orbit may be seen nearly edge-on

• A binary star system is stellar system, in which two stars orbit around their center of mass , which include in eclipsing binary syestem. Hence above two related to eclipsing  thus it include in Eclipsing category