___________ is (are) observed when light from a distant quasar travels past a massive galaxy between us and the quasar, and this light is focused to form two or more images of the same quasar.
a. A double-lobed radio galaxy
b. Superluminal expansion
c. The gravitational lens effect
d. A blazar
e. Gravitational waves
Question 2
If the stars at the turnoff point of a cluster have a mass of 3M, what is the age of the cluster?
a. 3.01010 years
b. 3.3109 years
c. 6.4108 years
d. 1.61011 years
e. The age of a star cluster cannot be determined from the mass of stars at the turnoff point.
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
Observed Mother–Child Arguments at Five Time Points Over an Eight-Year Period
CT scan of the head shows a massive bleed with a midline shift.
Endangerment sites of the head and face. Use only light to moderate pressure on head and face.
A batter hits a home run in which the ball travels 110 m horizontally with no appreciable ...
Light micrograph of a live diatom, with chloroplasts visible through the shell