for small (faint) the sky brightness (background) also scales up >> signal to noise plateaues. Thus planets irrelevant. /3.
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Yes, but it is visible at times. Nathan is saying Amy said nothing within Earth orbit can be seen in night sky.
No way to verify and I'm sure Amy would remember exchange differently. And Nathan used Venus as a counterexample.
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It is a fact that *nothing* inside Earth's orbit is seen in the night sky except for few mins after sunset & before sunrise.
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It's more than a few minutes and more than a little bit, right? Venus is 26 million miles closer to the sun—a lot of space.
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That is how night works ... Facing away from the Sun and 'inside' of Earth's orbit.
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