1. If you observed the position of Mars relative to the background of stars from
ID: 637566 • Letter: 1
Question
1. If you observed the position of Mars relative to the background of stars from night to night, which way would Mars move relative to the stars?
Always East
Usually West, but sometimes East
East half of the time and West half of the time
Always West
Usually East, but sometimes West
2.
One day during the year the sun changes from being south of Earth's equator to being north of the equator. What is that day called?
vernal equinox
winter solstice
autumnal equinox
summer solstice
3.
The latitude is Yuma, AZ 33 degrees north of the Earth's equator. At Yuma, what is the angle between the northern horizon and the north celestial pole?
23.5 degrees
33 degrees
40 degrees
57 degrees
90 degrees
Always East
Usually West, but sometimes East
East half of the time and West half of the time
Always West
Usually East, but sometimes West
2.
One day during the year the sun changes from being south of Earth's equator to being north of the equator. What is that day called?
vernal equinox
winter solstice
autumnal equinox
summer solstice
3.
The latitude is Yuma, AZ 33 degrees north of the Earth's equator. At Yuma, what is the angle between the northern horizon and the north celestial pole?
23.5 degrees
33 degrees
40 degrees
57 degrees
90 degrees
Explanation / Answer
Answer: Please check your options since it should be “Usually towards east but sometimes towards the west”.
From Earth, Mars will appear to generally move in the East direction (i.e from west to east). However, for a few months after almost every 2 years, Mars appears to move from east to west. This small time frame when Mars seems to move in the opposite direction is called a retrogradeand is merely an illusion since both Earth and Mars are moving in the same direction but Earth covers the orbit faster.
Please repost other question separately since they need a thorough independent explanation.
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