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The Dark Side of the Moon

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Nasa has released a unique video showing the moon as it moves in front of the sunlit side of the Earth.

The series of test images was taken aboard the Deep Space Climate Observatory (DSCOVR) satellite and shows the fully illuminated "dark side" of the moon - the side that is never visible from the Earth.

A NASA camera aboard the Deep Space Climate Observatory (DSCOVR) satellite captured a unique view of the moon as it moved in front of the sunlit side of Earth last month. The series of test images shows the fully illuminated “dark side” of the moon that is never visible from Earth.

The images were captured by NASA’s Earth Polychromatic Imaging Camera (EPIC), a four megapixel camera and telescope on the DSCOVR satellite orbiting 1 million miles from Earth.
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Bill_I_Am

:-)))

myself1935

Thank you for your nice comment, Bill

robf

It's already added to my to-watch list. Thanks for the tag, Jean!

myself1935

@Mischka

myself1935

Thanks for the addition, Bill-

@robf

Bill_I_Am

:-)))

ElvisBanana

@Bill_I_Am that was a cool video! Thanks for the link!

Bill_I_Am

Thanks for the tag, Elvis. And thanks for the lovely puzzle, Jean. Here is the video mentioned in the blurb above:

https://youtu.be/DMdhQsHbWTs

myself1935

Glad you like it, Elvis, and thanks for forwarding...

ElvisBanana

This is very cool, myself1935! I think my buddies, @Bill_I_Am and @jigidy would love it, too!

myself1935

Oh Nancy- thank you but don't hold your breath- the last one took six months!

myself1935

l had no idea l would start such a conversation, Rob. but l should have guessed!
It's a pleasure to learn from you- Thank you-

nanapuzzler

I'm looking forward to your space cruise ♥(✿◠‿◠)

robf

Almost perfect.
The dark circle we see is the moon. This is how bright it really is with full sunlight on it!
So from the satellite's perspective it's a Full Moon. (And a Full Earth)

In the picture the moon looks much darker than a full moon seen from Earth, because the Earth behind it is much brighter than a black sky.

What is facing the earth is a New Moon. You can imagine the sun behind the satellite, and just a smidge to the left; it's lighting up both the moon and the Earth. So the side of the moon facing the Earth must be dark.

If the sun, moon and Earth are not exactly in line (that happens only twice a year during eclipses), there'd be a tiny, extremely slim crescent of moonlight visible, but you'd need equipment to see it. The moon's so close to the sun (as seen from Earth) at the time of this picture that it would be drowned out by the bright sunlight and blue or red sky.

myself1935

l assume that the dark circle we see is the new moon-
However, looking at it from the perspective of the picture- what is facing the earth is the full moon, so that is the correct answer-
Both are correct it seems, depending on the perception of the questioner-

Wheeehhh! Do l pass the test?

robf

So you had the right idea. That counts as a full score in my book.

And yet... as seen from the DSCOVR satellite in this photo, it IS a full moon!

myself1935

l just looked it up, rob- l was going to write full moon but l had the wrong name- l was thinking all dark., and that is called new moon-
TA-RAH!

robf

What was your guess, Jean?

myself1935

Betty- My sympathy as well- l hope it lets up soon-

Rob, You get the gold star as well as my profound admiration-

l was totally wrong- l kindda followed your explanation but lost you along the way...
That's the advantage of a superior education, including self-taught on just about everything!

robf

Ooohhh, my sympathies BJ!

You could look through the earlier puzzles for today to find Doritos-flavoured Scope. Would that keep you going? :-/

bjondron

Good to know,but right now I have sciatica killing me so I'm finding it hard to even figure out what to have for dinner tonight. ha, ha

robf

A: It was a New Moon.

Since that's rather obviously western North America seen through the clouds at upper centre, we know the Earth's north pole is at the top, at about the 11 o'clock position.

So the moon will be traveling from left to right as we see it here. It has a tiny crescent shadow on the right, and the Earth has a fuzzy edge on the right, so they seem to be forming a straight or just about straight line to the sun.
All the sun's light is on the side of the moon which we can see in the puzzle. So no sunlight would be on the other side, the familiar side, facing the earth.

This is the stuff that slowly grows in the mind from years of fooling around with astronomy and with 3D programming. It's like the expert in your wilderness camping group who can take one look at a tree and tell you where North is; without much effort that expert can be cajoled into revealing the secrets too.

robf

It's interesting to read about everyone's point of view, and how they arrived at it.

myself1935

l think l know, but Yikes! the questions you ask, Rob-

robf

Pop quiz.
What phase was the moon in, when this photo was taken?

Answer on Friday. Please save your answer in a drawer or a flash drive, instead of typing it into a comment — so others may venture in as well.

myself1935

i was pretty sure you would like this, Fiona-

Mischka

Wow, @myself1935, this is wonderful! THANK you! :-D

myself1935

Luckily, Betty, we never see the dark side of the moon so it does not affect us-

bjondron

I have SAD so this is no place for me!

myself1935

Okay with me-
l don't know what images we would use...
l would love to do another one with you-
What about if we invent a fairy or dragon tale?
Let me know when you're ready-

robf

I've made a note to leave another comment here on Friday. Just routine things to put to bed, so I have a clear area for thinking.
Then we can see whether this has enough potential to be worth another push... just a month or so this time, building off all our experience, okay?

myself1935

OMG- l was not serious, Rob- However... l am always up for an adventure...

robf

"Fly me to the moon,
And let me sing among the stars;
Let me see what spring is like
On Jupiter and Mars..."

A fun and very tempting idea! Give me a few days to settle some things down and get back to you, Jean.

myself1935

Do you want to do another one in outer space?

l thought you would like this one, Rob- l am glad you do-

robf

Our cruise never made it out this far.

What an amazing sight. Thanks Jean ♥♥♫☼

myself1935

@Sissel @jkc @manicpuzzler @solidrock5806 @spunky @jmhoyer @dbnc2 @Birgit73 @kmccarrel @Donnajames @nanapuzzler @irisriver @IssyCoston @bdmc @lovesgulls @dhi @Magaella @Droelfzehn @Peggystarr3 @renegal59 @helenpuz @jmhoyer @bjondron @Mischka @esm306

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