The image below was probably taken in ____________ wavelengths because _______________________.
A) radio;the disk probably contains many planets with intelligent life,who are beaming out radio and television signals into space
B) infrared;the central regions are bright,and cool stars in the bulges emit a lot of infrared light
C) visible;there is a lot dust in this galaxy that blocks light in a ring about halfway along the disk
D) ultraviolet;the light from hot young stars is mainly found along spiral arms
E) X-ray;the central nucleus is easily seen,and AGN emit a lot of X-rays
Correct Answer:
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