Recent content by Phlogiston

  1. Phlogiston

    Undergrad Why can I see the ISS from 250 km away but not planes at 80 km?

    Thank you I didn't consider that. But now it seems obvious.
  2. Phlogiston

    Undergrad Why can I see the ISS from 250 km away but not planes at 80 km?

    I have a friend who I was trying to explain why we can see the ISS. Unfortunately though I don't have a good enough physics background to adequately answer his question, which was: "Why can I not see a plane once it reaches about 80 km away, yet I can see the ISS, at over 250 km away" This is...
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