How do scientists use a spectroscope to determine a star's composition? a. they study patterns in light bands that are separated from starlight by the spectroscope. b. they use the spectroscope to study sound waves that are traveling from the star. c. they use the spectroscope to create a man-made star that they study in a lab. d. they run tests on gas samples that the spectroscope collects from the star's core.

Its actually A

Step-by-step explanation:

They study patterns in light bands that are seperated by starlightby the spectroscope

 They study patterns in light bands that are separated from starlight by the spectroscope.

Step-by-step explanation: Each element absorbs light at specific wavelengths unique to that atom. When astronomers look at an object's spectrum, they can determine its composition based on these wavelengths. The most common method astronomers use to determine the composition of stars, planets, and other objects is spectroscopy.

5/20 so 25%

step-by-step explanation:

“ a line segment that has the endpoints on the circle and passes through the midpoint is called the diameter. the diameter is twice the size of the radius. a line segment that has its endpoints on the circular border but does not pass through the midpoint is called a chord. a circle is the same as 360 small circle up the number 0 . i hope this .