The following graph models the recessional velocity of stars versus distance from Earth. The slope of line is about 70 km/s per Megaparsec. What would be the approximate recessional velocity

for a star located 2 Megaparsecs from Earth? Scientists are confident in the claim that the universe is currently expanding. What evidence to they provide to support this claim? The following graph relates redshift to the distance from Earth. Star O has a redshift of 0.001. Star P has a redshift of 0.003. Using the graph above, V Mpc.how far from Earth is Star O? About how far from Earth is Star P? AboutМрс. If Star O and P are stars with similar luminosity, how will their brightness appear from Earth? The relative brightness and luminosity of star X, Y, and Z are listed in the following table. Rank the stars according to their distance from Earth. The closest star should go on top of the list. Below is a graph relating the period of a Cepheid star and luminosity: Star A and Star B are two Cepheid stars with the same average brightness as viewed from Earth. Star A has a period of 4 days Star R has a period of 5 days 1A) How does the distance between Earth and Star A compare to the distance between Earth and Star B? 1B) What supports the answer to 1A?