Quotes About Astrophysical

Spheres are indeed fertile theoretical tools that help us gain insight into all manner of astrophysical problems. But one should not be a sphere-zealot. I am reminded of the half-serious joke about how to increase milk production on a farm: An expert in animal husbandry might say, Consider the role of the cow's diet... An engineer might say, Consider the design of the milking machines... But it's the astrophysicist who says, Consider a spherical cow...

Yatima's mind was reeling. The Transmuters hadn't indulged in any of the spectacular acts of astrophysical monument-building that a bored and powerful civilization might have gone in for: no planet-sculpting, no Dyson spheres, no black-hole juggling. But by tailoring a few neutrons on this obscure planet, they'd hitched the entire universe into synch with the time stream of an unimaginably larger structure.

Expressed in Planck units, the temperature T of a black hole is inversely proportional to its mass, m. This is a third law, Hawking's law: T = k/m. The constant k is very small in normal units. As a result, astrophysical black holes have temperatures of a very small fractionnof a degree.

I have no trouble publishing in Soviet astrophysical journals, but my work is unacceptable to the American astrophysical journals.