How Does a Day on the Moon Compare to Earth?

[blink_1992]

if anyone could help with either of these questions, it would be greatly appreciated, thank you (:

1) how long does a day on the moon last and why?
2) how many times larger does the Earth look if you were on the moon,compared to seeing the moon from earth? (provide calculation)

thanks a lot!
(:

 

[HallsofIvy]

Have you done anything on this yourself? I entered "a day on the moon" into google and got the answer quickly. (It is about a "moonth"!) And it is probably in your textbook.

As for the second question do you know the diameters of the moon and the earth? Do you know the distance from the Earth to the moon? You could probably look those up in your textbook or on google.

What would the circumference of a circle, with radius equal to the distance from the Earth to the moon be? What part of that would the diameters of the Earth and moon be? Do you see why that will give you your answer?

 

[Drakkith]

(It is about a "moonth"!)

If that's not a typo, then that's a terrible joke! And I love it!

 

[turbo]

If that's not a typo, then that's a terrible joke! And I love it!

Grrrrr!

 

[rwisz]

1) A day on the moon, also known as a lunar day, lasts approximately 29.5 Earth days. This is because the moon rotates on its axis at the same rate that it orbits around the Earth, causing one side of the moon to always face the Earth. This is known as synchronous rotation. Therefore, it takes the moon 29.5 Earth days to complete one full rotation on its axis, resulting in a lunar day.

2) The Earth would appear about 3.7 times larger if viewed from the moon compared to the moon viewed from Earth. This can be calculated using the formula for angular size: angular size = (actual size/distance) x (180/π). The actual size of the Earth is approximately 12,742 km and the distance from the moon to Earth is approximately 384,400 km. Plugging these values into the formula, we get an angular size of 0.33 degrees for the Earth as seen from the moon. In comparison, the moon has an angular size of 0.09 degrees when viewed from Earth. Dividing 0.33 by 0.09, we get a ratio of 3.7, indicating that the Earth would appear about 3.7 times larger when viewed from the moon.