The solar corona is much cooler than the Sun's surface; hence we must wait for a total solar eclipse to glimpse it with the naked eye
Indicate whether the statement is true or false
FALSE
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Quasars were used to determine the size of the Local Supercluster
Indicate whether the statement is true or false
Kepler's first law of planetary motion defied what long-held belief with ancient astronomers?
a. a heliocentric Universe b. a geocentric Universe c. uniform circular motion d. parallax of newborn stars e. perfection of the heavens
A moon with a smooth, uncratered surface would imply
A) the surface is completely liquid. B) the surface is very young. C) meteorites have never struck the moon. D) the moon lies within the planet's Roche Limit. E) a strong magnetic field surrounds the moon.
The balloon and the magazine shown in this figure are both electrical insulators. Suppose the magazine was replaced by an uncharged metal sheet of the same size as the magazine. The balloon would:
a. be repelled by the metal sheet. b. be attracted by the metal sheet. c. be unaffected by the metal sheet. d. have all electrical effects neutralized by the presence of the metal. e. acquire the opposite charge because of the metal.