Question

drag the dotted circle over the star. use the emission spectrum to determine the element that the star is made of as well as the direction the star is moving.

star number	element	shift	direction

|2|
|3|
|4|
|5|
|6|
|7|

Explanation:

Step1: Analyze emission spectrum

By comparing spectral lines of star's emission spectrum with known element - spectra, we can identify the element. Red - shift indicates the star is moving away from us and blue - shift indicates it is moving towards us.

Step2: For Star 1

Since it is hydrogen and has a red - shift, it is moving away.

Step3: For other stars

We need to compare their emission spectra with element spectra to identify elements and check for red or blue - shift to determine direction. But no spectra are provided for stars 2 - 7.

Answer:

Star Number	Element	Shift	Direction
2	Unknown	Unknown	Unknown
3	Unknown	Unknown	Unknown
4	Unknown	Unknown	Unknown
5	Unknown	Unknown	Unknown
6	Unknown	Unknown	Unknown
7	Unknown	Unknown	Unknown