In addition to having the phase of the Moon be full what is the other condition that must be fulfilled to have a lunar eclipse?
A. The Sun must be at the vernal equinox.
B. The Sun must be at the summer solstice.
C. The vernal equinox must be on the ecliptic.
D. The line of nodes must be pointing towards the Sun.
The line of nodes must be pointing towards the Sun.
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On the H-R diagram, most bright naked eye stars would lie at the ________
Fill in the blank(s) with correct word
The approximate intensity ratio between two stars is 100 . Thus the apparent visual magnitude difference between the stars is ______________
a. 1 b. 5 c. 10 d. 100
A bit of matter that enters Earth's atmosphere and survives to reach the ground is called
a. a meteor. b. a meteoroid. c. a meteorite. d. a minor planet. e. an asteroid.
Asteroids ________.
A. are about the same size as planets, but have not pulled themselves into a spherical shape B. are small bodies, typically the size of a grain of sand or a boulder C. are larger objects, a few hundred kilometers in size, but not quite large enough to be classified as a planet D. can range in size from a few meters to many hundreds of kilometers