There is one and only one correct answer to each question. Some of the numbers are approximate so pick the nearest correct value. Answers must be on a Scantron sheet. Be sure to put your name , ID number, letter designation of the form, and section on the sheet.
Correct answers appear in red.
The distance of Mars from the earth changes by about a factor of 3. A trans-Neptunian object is observed to orbit the sun with a period of 1000 years. It didn't, they both landed at the same time. The star Betelgeuse is very red and the star Rigel is very blue. Normal hydrogen which is not moving has a spectral line at a wavelength of 656.28 nanometers.