Are there any data from spacecraft that visited that planet? How large the Earth is when viewed from that planet?

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    $\begingroup$ Note that data from spacecraft is unnecessary. We know the characteristics of the Earth and its distance from Saturn, and mathematics can do the rest. We would never have to visit Saturn to know what Earth would look like from it. $\endgroup$
    – Mike Scott
    Commented Nov 30, 2023 at 10:22
  • $\begingroup$ Please check the answer of astronomy.stackexchange.com/questions/47335/… $\endgroup$ Commented Nov 30, 2023 at 10:37
  • $\begingroup$ different but related: How will planets behave in the night sky as seen by Mars colonists? $\endgroup$
    – uhoh
    Commented Nov 30, 2023 at 14:02
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    $\begingroup$ Perhaps the question is, when viewed from the "surface" of Saturn? $\endgroup$
    – Pablo H
    Commented Dec 1, 2023 at 13:02
  • $\begingroup$ Odin, a very simple way to think about it. All the planets are "about" the same size. (It's not like there's a planet that's the size of a sun, a galaxy or a pick-up truck!) If you look up tonight all the planets look "about" the same size to your eyes - basically a dot. The Earth's going to be the same. $\endgroup$
    – Fattie
    Commented Dec 1, 2023 at 16:58

1 Answer 1



It's a tiny blue dot of just about 1.6 arc seconds diameter. Cassini made the most famous image of the "In Saturn's Shadow – The Pale Blue Dot", in remembrance of the first such image from Voyager one: a view of Earth and Moon from Saturn (image: NASA/ESA). In Saturn's Shadow – The Pale Blue Dot

The dark side of Saturn, its bright limb, the main rings, the F ring, and the G and E rings are clearly seen; the limb of Saturn and the F ring are overexposed. The ‘breaks’ in the brightness of Saturn’s limb are due to the shadows of the rings on the globe of Saturn, preventing sunlight from shining through the atmosphere in those regions. The E and G rings have been brightened for better visibility.

Earth, 1.44 billion km away in this image, appears as a blue dot at centre right; the Moon can be seen as a fainter protrusion off its right side. The other bright dots nearby are stars.

JPL shows a few more images, including a zoom image taken of the Moon-Earth-system.

See also the wiki entry on "pale blue dot" as part of the impressive "family portrait" series taken by Voyager 1 in 1990 from a distance of about 40 AU which show most of our solar system planets from 6 billion kilometers distance. Also compare with the successor series taken by the messenger spacecraft 20 years later in 2010 from about the orbit of Mercury.

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    $\begingroup$ Not sure whether the OP wanted an angular or pixel size, but could address that part and provide a size of Earth in arcseconds ? $\endgroup$ Commented Nov 29, 2023 at 22:07
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    $\begingroup$ pixel size depends on used camera (and can be checked by following the link to the full-size image), but angular size is fixed for a given distance. I added that. Thanks :) $\endgroup$ Commented Nov 29, 2023 at 22:32
  • $\begingroup$ So this image is fake ? $\endgroup$ Commented Nov 30, 2023 at 15:51
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    $\begingroup$ No, what makes you believe that? $\endgroup$ Commented Nov 30, 2023 at 17:15
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    $\begingroup$ Just to clearify: Voyagers "pale blue dot" was part of the "family portrait"; it was not taken when Voyager was near Saturn. $\endgroup$
    – Abigail
    Commented Nov 30, 2023 at 23:38

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