phyzguy's latest activity
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phyzguy replied to the thread NASA Currently trying to build a rocket to launch into space.If you're going to launch a rocket to even 10 km, you're potentially going to cross paths of commercial aircraft. I suspect that the... -
phyzguy replied to the thread Astronomy Looking for a book on the effects of orbits on celestial observations.AAS (the American Astronomical Society) has a free introductory astronomy textbook available online at the link below. If, after...
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phyzguy replied to the thread NASA Currently trying to build a rocket to launch into space.And yet still no punctuation nor capitalization of the second sentence.
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phyzguy replied to the thread Undergrad Before the Big Bang.Polaris is "up" from the north pole. North is a direction along the surface of the Earth.
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phyzguy replied to the thread Undergrad Before the Big Bang.One possibility, known as the Hartle-Hawking no boundary proposal, is that if you go backward in time towards the big bang, you reach a...