What do astronomers mean by the Big Bang? What cosmological model did Nicolaus Copernicus propose? What did Ptolemy do for astronomy? What is the Copernican principle? What does apogee mean in astronomy? What is Ptolemaic theory? When did Aristarchus of Samos propose his heliocentric model?
What aspect of Ptolemy's cosmological model did Copernicus retain? What is the difference between heliocentric and geocentric? What has the Hubble Telescope discovered? Where is the Copernicus crater? What does heliocentric mean? Why did Ptolemy believe in the geocentric model?
What does cosmological redshift do to light? The cosmological redshift is a consequence of the expansion of space. The expansion of space stretches the wavelengths of the light that is traveling through it. Since red light has longer wavelengths than blue light, we call the stretching a redshi...
aEven though Hubble’s data were quite rough and not as precise as the modern ones, the law became generally accepted, and Einstein had to admit that the Universe is indeed expanding. It is said, that he called the introduction of the cosmological constant his “greatest mistake” (Eselei ...
一、政治哲学问题【政治哲学与善】雅典与耶路撒冷。“所有政治行动的目标不是保守就是变革。当渴望保守时,我们希望不要变得更糟;当渴望变革时,我们希望能带来更好的东西。所有的政治行动因而都由某种更好或更糟的思想引导。但关于更好或更遭的思想隐含着关于善的思考。引导着我们所有行动的对善的意识具有意见的特点...
Dark energy might be the cosmological constant — a latest energy of space that always has the same strength. Or it could be an energy field that pervades the entire universe but can fluctuate in strength at different points in time and space. Because we don't know for sure how dark ...
4 What does Reichenbach mean when he says that employing induction is rational,even though we lack a justification for induction? How is Reichenbach’s approachto the rationality of employing induction similar to Pascal’s wager, and how is it different?4.Reichenbach提出即使我们缺乏对归纳方法的证...
Does omnipotence imply omniscience? (According to the view that omnipotence entailsomniscience, we can conclude that the necessary being is essentially omniscient as well.) If I am right, Gale and Pruss's argument has advanced the cause of optimal cosmological arguments in an important way. ...
One might object that a mosquito lacks self-awareness and introspection. But does that mean a newborn human baby is not conscious? How, relative to consciousness, is that newborn different from a mosquito? Consciousness isn’t just the brain:The body shapes your sense of self | New Scient...
What cosmological model did Nicolaus Copernicus propose? What is planetary astrophysics? What does heliocentric cosmology mean? Why did Ptolemy believe in the geocentric model? What is precession in astronomy? Who believed the universe was heliocentric?