Starship Asterisk*

Has anyone ever calculated the duration of an explosion like a supernova? e.g. a firecracker or a tnt bomb seems instantaneous beginning and ending at the same fraction of a moment. How long does a cosmic explosion go on from the moment it starts? Duration. And related to that is the Big Bang explos...

When thinking of and discussing something like this Equinox, do you think we humans will ever be able to speak of the earth moving rather than the sun? The earth could bow to maybe, or could slip under the image of, could revolve under or over the image of, for example. I think we hinder the develop...

This Deep Auriga Starfield looks like it is jammed with stars. Two questions: 1. When they move are they so close they might bump into each other? 2. Is our sun as close as these, is it in a starfield as jammed with stars as these? Wally Weet

Do the stars in cluster M34 all revolve together in the same orbit or do they each have separate orbits in which case they must look like a cluster of insects all flying three dimensionally in different directions yet staying pretty much together.

Do galaxies wither and die? Are they subject to the Second Law? Or do they forever renew and last forever? It seems all the matter in the universe deteriorates, do galaxies?

The perspective, the visual perspective, that haunts me about M94 is that as I gaze on the image I can only see a deep, three dimensional swirling cone moving deeper and deeper down into the heart and center of the image as though the whole thing were a whirlpool taking everything down toward the in...