ASTR 102 Study Guide - Final Guide: Spiral Galaxy, Disc Galaxy, Planetary Nebula
19
ASTR 102 Full Course Notes
Verified Note
19 documents
Document Summary
An astronomical unit (au) is the age of the universe. any planet"s average distance from the sun. Earth"s average distance from the sun. the average distance between galaxies. No, because galaxies cannot exist at that distance. Yes, but only with an instrument that can measure extremely long wavelengths due to the extremely high redshift. No, because it would be beyond the bounds of our observable part of the universe. Only the opscan sheet will be used for evaluation of your answers. However, you must return this problem sheet with the opscan sheet. 1 light year. we see that there are fewer galaxies far away. we see a larger portion of the current universe. we look further into the future. The andromeda galaxy is circling us at constant distance. stationary relative to us. An accepted scientific theory must: make falsifiable predictions that can be tested in experiments, why is a sunflower yellow, blue light has a shorter wavelength than red light.
