Astronomy a star’s light is shifted to the blue part of the light spectrum. what does this mean about the length of light waves and movement of the star? explain your answer. a. the wavelengths are getting longer, meaning the star is moving away from the observer. b. the wavelengths are getting longer, meaning the star is moving toward the observer. c. the wavelengths are getting shorter, meaning the star is moving toward the observer. d. the wavelengths are getting shorter, meaning the star is moving away from the observer.

The diagram below shows the layers of a rock having a trilobite: a rock column labeled rock is shown. the column has three layers. the bottommost layer of the rock has one shaded rhomboid shape, the middle layer has a rhombus with a diagonal along with two identical organisms marked as, trilobite, in the key, the top layer has two semicircles. a key is shown on the right side of the diagram. the shaded rhombus is marked as a, the rhombus with the diagonal is marked as b, the semicircle is marked as c which statement about the rock fossils is true?