Pulsars could not be ordinary stars that are pulsating because the pulses are too short
a. True
b. False
Indicate whether the statement is true or false
True
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Associations are loose groups of young stars in the spiral arms usually mingled with large clouds of gas and dust.
Answer the following statement true (T) or false (F)
Contrast the sources of Jupiter's and the Earth's internal energy flows
What will be an ideal response?
M31 in Andromeda is a bigger version of our Galaxy, and the largest member of the Local Group
Indicate whether the statement is true or false
That the Tharsis region on Mars has so few craters
A) suggests it is the youngest region on the planet. B) suggests it is at the center of a particularly strong magnetic field. C) is due to annual flooding and water erosion. D) proves tectonic activity is taking place. E) is due to the very low elevation of the region.