The graph above shows 4 models for how the average distance between galaxies could change with time, from the past (left) to now (middle) to the future (right-hand side). The graph also shows real data, based on white dwarf supernovae. Which model(s) predict(s) that galaxies will eventually get closer together?
A) accelerating
B) coasting
C) critical
D) recollapsing
E) all of them
D) recollapsing
You might also like to view...
In a shear-thinning material, the applied shear stress divided by the viscosity is equal to the shear strain rate to a power that is equal to
(a) 1 (b) A number less than 1 (c) A number more than 1 (d) 2
In 1632, which book did the Inquisition order sales to be stopped?
a. De Revolutionibus b. Stederreus Nunctus c. Dialogo d. De Stella Nova e. Astronomia Nova
Irregular galaxies, although small, have large H II regions and much on-going star formation for their size
Indicate whether the statement is true or false
What is the main reason mountaintops are so cold?
A) The air is thinner at higher altitudes. B) Mountaintops are above much of the greenhouse gas in the atmosphere. C) The winds are stronger at higher altitudes. D) There is more water vapor at higher altitudes, causing there to be more snow. E) All of the above are true.