As today's the 29th anniversary of possible Armageddon, had Mutual Assured Destruction taken place, with the USA and USSR exchanging most of their nuclear arsenal, what would someone
- In low earth orbit
- On the moon
- On Mars
observe with the naked eye, given the right conditions e.g. they are on the surface of the moon/Mars facing Earth, both
- During the exchange, and
- After the exchange (compared to before it)?
Would only detonations be visible, or the launch and trajectory of the rockets too? Presumably a war would span the entire northern hemisphere, so some parts will be in daylight and some at night.
If there were aliens equipped with only technology we have today, how near must they be to detect that something unusual was happening (ignoring the speed of light)?