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Moon NASA

An Epic View of the Moon In Earth's Orbital Embrace 77

astroengine writes: As a suitably impressive follow-up to the new "blue marble" image of our world released in July, NASA shared a gorgeous animation created from pictures captured by NOAA's Deep Space Climate Observatory (DSCOVR) spacecraft positioned nearly a million miles (1.5 million km) away — over four times farther than the moon. In a series of images acquired between 3:50 and 8:45 p.m. EDT on July 16, 2015, the moon can be seen passing in front of a rotating Earth, the warm gray face of its far side framed by the swirling-cloud-covered blue water of the eastern Pacific Ocean. The north pole is at the 11 o'clock position, illustrating our planet's 23.5-degree axial tilt.
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An Epic View of the Moon In Earth's Orbital Embrace

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  • Beautiful. (Score:5, Insightful)

    by ScentCone ( 795499 ) on Thursday August 06, 2015 @11:10PM (#50267025)
    Truly beautiful.

    That is all.
  • It's pretty cool but it also seems super low color, like someone converted it to gif with the standard websafe palette from the 90s. I was really hoping that this was hardware launched two decades ago, because then the colors would have felt very appropriate :/

    • by sims 2 ( 994794 )

      I second that emotion.

    • Re:How many colors? (Score:5, Informative)

      by Anonymous Coward on Friday August 07, 2015 @02:55AM (#50267557)

      The youtube version shows a lot more color: https://www.youtube.com/watch?v=DMdhQsHbWTs

      Unfortunately, because of the way the images were taken, with separate exposures for the red green and blue colors, the moon is slightly blurred and has a color fringe around it. This is further compounded by the extremely flat light, rendering the moon in the image rather featureless.

      What I found most interesting about this image is that it really shows how dark the moon is. It's something to think about when looking at the seemingly stark light of the full moon. Imagine how bright it would be if it was snow white.

      • by jez9999 ( 618189 )

        What I found most interesting about this image is that it really shows how dark the moon is. It's something to think about when looking at the seemingly stark light of the full moon. Imagine how bright it would be if it was snow white.

        It doesn't look that dark to me; it looks about the same brightness as the land on Earth. I guess it's Earth that's rather bright because of all the H2O being quite reflective.

        • I guess it's Earth that's rather bright because of all the H2O being quite reflective.

          Liquid H2O has a few percent reflectivity, not that different to the Moon's basalt (more-or-less basalt, some anorthosite too). What makes the difference is the presence of floating aerosols of droplets of liquid H2O in the atmosphere of the Earth, which has a reflectivity up in the 60s and higher of percent.

          Phase matters. (And in this case, changing phase involves a lot of latent heat moving in either direction.)

  • "That's no moon"
    • by hey! ( 33014 )

      ... "It's a binary planet [wikipedia.org]."

      Seriously the Moon is crazy large relative to the Earth. The Earth-Moon doesn't currently meet the most commonly accepted definition of "binary planet", although it will in a hundred million years or so. On the other hand Isaac Asimov proposed a very reasonable definition of "binary planet" which the Earth/Moon system meets; you can read about it in the link above. I think it figured in one of the Foundation stories.

      • The earth-Moon system is not binary by strict definition, because the center of mass around which they orbit is still about 1,000 miles inside the Earth. But that's enough for the Earth to wobble noticeably as it orbits the Sun.

  • by Thing 1 ( 178996 ) on Thursday August 06, 2015 @11:34PM (#50267097) Journal
    They made up all that math. The Earth is flat, see "Zetetic Astronomy": http://www.sacred-texts.com/ea... [sacred-texts.com]
  • “It is surprising how much brighter Earth is than the moon,” said Adam Szabo, DSCOVR project scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “Our planet is a truly brilliant object in dark space compared to the lunar surface.”

    The Moon has an albedo of about 0.1 (similar to coal), while Earth's albedo is three times greater, so this isn't really very surprising at all.

    • by Anonymous Coward

      Not surprised because of the water, but was pleasantly surprised at seeing the reflection of the moon on the ocean from a million miles.

    • by Jason Levine ( 196982 ) on Friday August 07, 2015 @08:38AM (#50268345) Homepage

      It's one thing to know the numbers. It's another thing to see those numbers in action.

    • Is that large bright area that stays centered in the Pacific the reflection of the Sun behind DSCOVR? If so, I'm surprised how large and diffuse it is. I suppose that even from a million miles away the surface of the ocean must be pretty rough.

Math is like love -- a simple idea but it can get complicated. -- R. Drabek

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