Author Question: Sunspots are dark because a. regions of the photosphere are obscured by material in the ... (Read 83 times)

student77 · **on:** Jul 27, 2018

Sunspots are dark because

a. regions of the photosphere are obscured by material in the chromosphere.
b. shock waves move through the photosphere.
c. the Sun rotates differentially.
d. they are cooler regions than the photosphere.
e. they radiate their energy into space faster than the rest of the photosphere.

Question 2

The eccentricity of a planet's orbit describes

a. westward motion in the night sky when observed on successive nights.
b. the deviation in shape when compared to a circle.
c. its tilt with respect to the ecliptic plane.
d. the tilt of the planet's rotational axis with respect to the ecliptic.