Question

2 multiple choice 1 point why do stars seem to make circles around the sky in the course of a single night? the stars really do move that much overnight the earth is rotating and the stars appear to be moving the moon is dragging the stars through the sky the gravity of the sun 3 multiple choice 1 point what units is right ascension measured in? kilometers lightyears decimal degrees hours, minutes, seconds 4 multiple choice 1 point

Explanation:

Question 2

To determine why stars seem to make circles around the sky in a single night, we analyze each option:

• Option 1: Stars don't move significantly overnight relative to Earth's rotation scale.
• Option 2: Earth's rotation on its axis makes stars appear to move in circular paths (apparent motion).
• Option 3: The moon's gravity doesn't drag stars; it affects tides and its own orbit.
• Option 4: Sun's gravity governs planetary orbits, not star apparent nightly motion.

So the correct answer is the one about Earth's rotation causing apparent star movement.

To find the unit of right ascension:

• Option 1: Kilometers measure distance, not celestial coordinates.
• Option 2: Light - years measure astronomical distance, not right ascension.
• Option 3: Decimal degrees are for declination (or other angular measures), not right ascension's primary unit.
• Option 4: Right ascension is measured in hours, minutes, seconds (based on Earth's rotation, 24 hours for a full circle).

So the correct unit is hours, minutes, seconds.

Answer:

B. the earth is rotating and the stars appear to be moving (assuming the options are labeled A, B, C, D with this as the second option; adjust label if needed)

Question 3