Planets found in the habitable zone of other stars:
A) are all rocky planets, like the terrestrial planets in our solar system.
B) are all jovian planets.
C) include some Earths and super-Earths.
D) include hot Jupiters.
E) have been demonstrated to be barren of all life.
C
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The extraordinary blueness in lakes in the Canadian Rockies is the result of
A) high-altitude refraction of light. B) glacial silt in the water scattering blue light. C) the unique temperatures of these lakes throughout most of the year. D) none of the above
William Herschel made the first map of the Galaxy about 200 years ago
Indicate whether the statement is true or false
Charged particles from the Sun enter Earth's atmosphere close to the magnetic poles and cause
a. global cooling. b. global warming. c. auroras. d. ozone depletion.
When you look into a pool of water, the depth looks less than it actually is because of __________
Fill in the blank(s) with correct word