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Old 01-09-2017, 07:56 PM   #1
seanjo
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Default Earth And Moon From Mars.

earth-moon-from-mars.jpg

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The pale blue dot we call home is back in the limelight again. The Mars Reconnaissance Orbiter grabbed a shot of Earth and our moon with its High Resolution Imaging Science Experiment (HiRISE) from a pretty staggering distance late last year. Now, it might look a little pixelated at first, but you need to understand the circumstances before casting judgment.

This photo was taken at a distance of 127 million miles last November 20th, according to NASA. That's roughly 1.4 times the distance between Earth and our star. What's more the photo is a composite of two pictures that were taken in an effort to calibrate the instrument.

"For presentation, the exposures were processed separately to optimize detail visible on both Earth and the moon," NASA writes. Otherwise, the moon would be too dark to see in a single exposure. It's important to note that this is a common technique for photographers of any type -- basically, it's an HDR photo.

The aeronautics agency says that the positioning between Earth and the moon is correct, as are the sizes, despite the compositing. What's more, the distance between Gaia and our moon is about 30 times that of Earth's diameter.

No, this image isn't pin-sharp, but the shots HiRISE is grabbing of the Martian surface are. Especially when it can "resolve features as small as 3.3 feet" from its spot on the Orbiter, according to Space. Try doing that with Nikon's P900 superzoom camera.

https://www.engadget.com/2017/01/08/...on-miles-away/
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Old 01-10-2017, 05:15 AM   #2
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There we are, the greatest things we've ever known, completely invisible to the rest of the Universe. Our greatest accomplishments include landing a dozen men on the small rock next to us and returning them alive to the blue rock the came from. Still sending out robots to do mans job because we are too afraid of having humans die in space. As far as we've come we are not even 1% of where we believe we are. We are monkeys that live on a hot wet rock surround by a bubble of gas. If we survive ourselves long enough we might just realize the only way to actually matter is to accept they currently we don't matter at all except to those who will will one day matter no more than our forgotten ancestors matter to us. Then start actually spreading the life and knkwledge we have on our planet to our solar system and beyond.
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Old 01-10-2017, 07:05 AM   #3
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Great find Sean!
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