Re: Why is ISS still visible in Earth's shadow?

From: George Roberts (
Date: Mon May 02 2011 - 01:53:09 UTC

  • Next message: Bob King: "Re: Why is ISS still visible in Earth's shadow?"

    >From the ISS's perspective it sees the sun set.  When the Sun is just on the 
    edge of the horizon it sees a redish light so the ISS starts to turn red. 
    After the sun sets the ISS still sees a large arc of the earth's atmosphere 
    as a bright red sunset arc.  At this point the ISS is getting quite dark 
    brown.  At some point after this the ISS sees no 'sunset' light at all, it 
    should be too dark to see even I would expect in a full moon but not sure 
    about that.
    The earthshine concept isn't right - there is no earthshine once the sun 
    sets behind the earth's limb.  Maybe moonshine but no earthshine.  The moon 
    sees earthshine when it is a thin crescent and the earth see's moonshine 
    especially when full.
    - George Roberts
    -----Original Message----- 
    From: Bob King
    Sent: Sunday, May 01, 2011 8:36 PM
    Subject: Why is ISS still visible in Earth's shadow?
    Hi everyone,
    I've always wanted to ask this question. No doubt some of you have
    followed the space station into Earth's shadow, where it's visible for
    some time with binoculars. Is it being illuminated by the moon or ???
    Thank you for your help!
    Best wishes,
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