The study of the oscillations of the surface and interior of the sun is known as ____________________
Fill in the blank(s) with correct word
helioseismology
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The solar energy coming to the earth by radiation is 1,340 W/m2 when the temperature of the Sun is 5800 K. If the temperature of the Sun decreased by 10.0%, then what would be the amount of solar radiation coming to the earth?
A. 879 W/m2 B. 752 W/m2 C. 667 W/m2 D. 610 W/m2 E. 578 W/m2
Quasar red shifts are usually larger than the red shifts of the visible galaxies
Indicate whether the statement is true or false
About how many galaxies are there in the observable universe?
A) roughly (within about a factor of 10) the same as the number of stars in our galaxy B) a few dozen C) a few thousand D) about as many as the number of grains of sand on all the beaches on Earth E) an infinite number
The following statements are all true. Which one counts as an "exception to the rule" in being unusual for our solar system?
A) The diameter of Earth's Moon is about 1/4 that of Earth. B) Venus does not have a moon. C) Jupiter has a small axis tilt. D) Saturn has no solid surface.