The sky is dark at night:
A) because the stars in the Milky Way are far away.
B) because the Sun is on the other side of Earth.
C) because there are far fewer stars on the night side of Earth.
D) because all the light from all the objects in the universe hasn't arrived here yet.
E) because the quasars are too far away from Earth for their light to have arrived here.
Question 2
The Moon's Orientale and Mercury's ________ Basin are both huge, multiringed impact scars.
Fill in the blank(s) with correct word
The Pleiades, an open cluster of stars in the constellation of Taurus.
Glow in the Dark Rabbits
The same star field photographed with (a) a ground-based telescope, which is subject to poor seeing
Planets and Their Stars
Vincent van Gogh, The Starry Night.
Experiments showing that long- or short-day plants flower in response to night length. Each horizont