Besides Shape,what Characteristic Clearly Separates Elliptical Galaxies from Spiral Galaxies

Q6: The spectrum of a galaxy is observed

Q7: If suddenly we find that the distance

Q8: A galaxy that is classified as Sc

Q10: The figure below shows the spectrum of

Q11: Which of the following does NOT support

Q13: Which distance indicator can be used to

Q14: Why are some galaxies' spectra blueshifted rather

Q18: According to Hubble's law,as the distance of

Q25: To be a standard candle an object

Q35: Describe the two assumptions regarding the universe