Please note: This is a guest post by @rokro11. He uses info from timeanddate.com to calculate the moon’s size. I, Stacey, have not looked into this personally. If you would like to comment or ask any questions, you can do that below or to @rokro11 on Twitter.
How to Calculate the Moon’s Size
In this article, I will provide some insight on how to calculate the size of the moon. The moon moves above the earth and all we need to know is the speed of the moon to do some simple math to calculate its size.
In order to obtain the speed of the moon, which varies throughout the duration of its travel while it moves above the earth, go to the site Timeanddate.com. This company is located in Norway and it reports the moon speed relative to the ground speed of earth. You can contact them at firstname.lastname@example.org
Go here for the Day and Night World Map.
Under the heading called “Sun & Moon”, click on “Day and Night Map.” About half-way down the page, it will indicate, “Position of the Moon” and you will find the speed of the moon relative to the ground speed of earth as indicated below:
According to the site, the speed of the moon changes between about 933 mph to about 1005 mph. The moon’s speed can change over 20 mph in a 24 hour period.
I captured a video of the full moon at 2:10 am on 05-30-2018. See how it moves:
For this specific example, I will be using the Timeanddate speed of the moon relative to the surface of the earth of 952.5 mph because I captured the video of the full moon at 2:10 am that morning. Now that we have the moon’s speed, along with video from a camera on the ground, we have to view how long it takes the trailing edge of the moon to reach the leading edge of the moon. The time it takes the moon to travel its width is 2:10, or two minutes and ten seconds.
Because the moon is traveling at 952.5 mph, it travels 15.875 miles in 1 minute. (952.5/60 minutes = 15.875 miles). The moon traveled across itself in 2 minutes and 10 seconds. We add 15.875 to 15.875 and come up with 31.75 miles, over 2 minutes.
How do we take into account the additional 10 seconds? Simply take the distance traveled per minute of 15.875 miles and divide that by 60 to arrive at the distance it travels per second. That yields .2646 miles per second. (15.875/60 = .2646 miles per second).
To account for 10 addition seconds, take .2646 and multiply it by 10 seconds, which results in 2.646 miles.
For the total amount of distance traveled, we add the 2 minutes of travel distance of 31.75 (for the 2 minutes) and 2.646 (for the 10 seconds) and that yields 34.396 miles.
By this method, the width of the moon is 34.396 miles.
This is not a complicated method and this is how to determine an object’s size if its speed is known.
Nasa claims the size of the moon is 2,158 miles wide. It’s not. The moon is also not 238,900 miles from earth. The moon’s size and distance is much less than we have been led to believe.
We don’t need Nasa to continue lying to us. If anyone finds errors in this method, provide your feedback. Don’t Google search the speed of the sun because that Google search result is misleading and the results only back up the heliocentric theory. It’s a diversion to keep you from finding the truth. Find a way to calculate the moon’s speed using information that makes sense, not based on unfounded and unreliable information from Nasa and other subjective and unverifiable sources.
Do this simple measurement and provide your own moon size calculations in the comments below. If you have any questions, ask here or @rokro11 on Twitter.