Suppose that Star X and Star Y both have redshifts, but Star X has a larger redshift than Star Y. What can you conclude?
A) Star X is moving away from us faster than Star Y.
B) Star X is hotter than Star Y.
C) Star Y is moving away from us faster than Star X.
D) Star X is moving away from us and Star Y is moving toward us.
E) Star X is coming toward us faster than Star Y.
Question 2
Laboratory measurements show hydrogen produces a spectral line at a wavelength of 486.1 nanometers (nm). A particular star's spectrum shows the same hydrogen line at a wavelength of 486.0 nm. What can we conclude?
A) The star is getting hotter. B) The star is getting colder.
C) The star is moving toward us. D) The star is moving away from us.
A star-forming region in the Large Magellanic Cloud.
Surface magnetic field of SU Aur (a young star of T Tauri type), reconstructed by means of Zeeman-Do
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
Shooting star
Spectral Line Motion in Binary Star Systems
Mass Loss from a Supermassive Star