Debunking wrong Earth size from the moon

Debunking claims that Earth's size from the moon in Nasa images is wrong such as the following :



The picture above is not taking into account the distance of the camera on board the satellite.

This is the result of my 3D simulation, which is to scale.

Note: Because of losing resolution the shot was taken 3/4 distance to the camera on board the DSCOVR satellite. But the result will only get closer to Nasa's image.



So now this is how Earth looks from the moon in the same simulation:



The results shows that both pictures from nasa are to scale as expected and it's not a valid argument to bring up.

a reply to: heineken

Look up focal length comparisons. Different ones make things look closer (larger) or further away (smaller).

Here's a link that explains it all for you.

a reply to: TerryDon79

yes in fact actual focal lengths for both cameras were used.

originally posted by: heineken
a reply to: TerryDon79

yes in fact actual focal lengths for both cameras were used.

Used for what?

You’ve plugged in data and distances into a 3D simulation. That will show you actual distance and looks, but not show what’s seen with different focal lengths.

a reply to: TerryDon79

the camera settings used in both apollo and the satellite were taken into account, that' s all im saying.

originally posted by: heineken
a reply to: TerryDon79

the camera settings used in both apollo and the satellite were taken into account, that' s all im saying.

That makes no sense as the image you presented is just a screen grab from the simulation software.

a reply to: TerryDon79

You can go into more details about this here Perspective Camera , I used this camera and as you can see it simulates much better than 'grabbing screens'.

a reply to: heineken

You still have a single image.

The Apollo 11 camera and DSCOVR focal lengths are very different.

a reply to: TerryDon79

did you go through the link ? I set the focal length for both cameras..the satellite image of course its cropped and zoomed in.

Heineken, I saw a thread where you brought up this topic, and Phage explained it very clearly for you. It doesn't take a physicists to figure this out. You are very wrong-headed here, so try to look at this moon business from the other perspective, and let go of these stubborn and incorrect ideas you have. You're not doing yourself any favors by clinging to this idea.

Okay buddy?

a reply to: angeldoll

Im ok buddy thanks.

I dont think you made it past the first picture I posted did you.



just in cased you missed it this is my conclusion.

The results shows that both pictures from nasa are to scale as expected and it's not a valid argument to bring up.

dude stop
you are going deep i this stuff and theres no coming back

a reply to: heineken

Nope.

There is no atmosphere on the moon to affect the view and there is nothing on the moon that gives a comparison to affect perception of size like there is on earth. Look at a moon-rise on earth and it appears larger because you have things in the view that help give the brain some perspective.

Once the moon is high in the sky it looks smaller than if it were on the horizon.

It is 250k miles from Earth and the measuring items left behind from our manned moon missions confirms that.

It should also be pointed out that the DSCOVR spacecraft was father away from Earth than it was from the Moon when the image was taken. So the relative size of the Earth as seen from DSCOVER (which was about 1,000,000 from Earth) will be different than the relative size of the Moon when seen from DSCOVER (which was about 760,000 miles from the Moon. The Moon being closer than the earth, it would look slightly larger compared to Earth than it should.

I mean, if we were only 100 feet away from the Moon, it would look HUGE compared to Earth.

About 2 years ago, I made a post in a thread asking if something was wrongs with the Moon because the DSCOVER image didn't look like the earth and Moon were the right sizes relative to each other. In that post, I explained why.

This is part of that post from 2 years ago:


Here is one of the still images from the DSCOVR spacecraft that is 2048 pixels x 2048 pixels total. I measured the diameter of the Earth to be roughly ( I may be off by a few pixels) 1600 pixels wide. The Moon in that same image was roughly 575 pixels wide. The relative difference between those is that the Earth is 278% larger.

FULL Size Image:
www.extremetech.com...

Smaller image to fit in this thread (use link to full size image above):


Now, that's not to say that the Earth is 278% larger than the moon, because it isn't. The Earth is about 7926 miles in diameter while the Moon is about 2160 miles in diameter. So calculating the actual size difference between the Earth and Moon would mean the Earth is 367% larger than the Moon...

...So why is there a discrepancy in the relative size of Earth to the Moon in the DSCOVR/EPIC image (367% versus 278%)? What's up with that?

Than answer is simple: The Moon was closer to the DSCOVR spacecraft than the Earth was when the picture was taken, so the Moon will look larger than it should be in comparison to Earth. The spacecraft was about 1,000,000 miles from Earth when the picture was taken, but only about 760,000 miles away from the Moon. So the distance between DSCOVER and Moon was only 76% of the distance between EPIC and the Earth.

76% of 367% = 278%.

B-I-N-G-O! The relative sizes in the EPIC image are correct.

Shot #4 is wide angle, boom.

Forced perspective.

Here's the advice I always give to people who make this claim:

Go out and admire the moon. See how big and shiny it is. Now take a photo of it. Disappointing right?

originally posted by: humanoidlord
dude stop
you are going deep i this stuff and theres no coming back

dude stop and READ

im debunking this claim not making it lol

a reply to: heineken

NO
they debunked it for you

originally posted by: humanoidlord
a reply to: heineken

NO
they debunked it for you

heineken debunked it in his OP.

The wording was a little hard to follow, but he was explaining the logcal reasons why the Earth looked so big in the DSCOVER image but small in the Apollo image.