Answer:
Luminosity is an intrinsic(natural) measurable property of a star independent of distance. The concept of magnitude, on the other hand, incorporates distance. The apparent magnitude is a measure of the diminishing(decrease) flux of light as a result of distance according to the inverse-square law.
Answer:
Maybe B
Explanation:
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Answer:
The tilt of the moon's orbit around the earth
Explanation:
On average of twice a year, throughout it's orbit, the moon will create a 180° angle with the Earth making the Earth's shadow visible on the surface of the moon causing a solar eclipse.
Answer:
removal of water molecule between each two units
Explanation:
Mountain chains that are now separated by bodies of water on different continents would match up if these continents are placed next to each other, as they were when pangaea existed.