The most detailed look we've had of an asteroid comes from:
A) spacecraft sent to an asteroid.
B) ground based optical images.
C) Earth orbital X-ray images.
D) ground based radar images.
E) high-altitude UV spectroscopy.
A
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Explain why it would be better to obtain stellar parallax for stars if we could observe from the planet Mars instead of the Earth
What will be an ideal response?
In order to predict whether a star will eventually fuse oxygen into a heavier element, what do you need to know about the star?
A) its luminosity B) its overall abundance of elements heavier than helium C) how much oxygen it now has in its core D) its mass
What results when the net force on an object increases?
a. Increased acceleration, but there is no way of calculating the increase. b. Decreased acceleration, but there is no way of calculating the decrease. c. Decreased acceleration, if the force and the velocity are in opposite directions. d. Proportionally increased acceleration. e. No change in the object's motion.
Red dwarfs:
A) lie in the upper left of the Hertzsprung-Russell diagram. B) are the biggest stars in the main sequence. C) are cool and small with low luminosities. D) appear 1000 times larger than the Sun.