An Expanding Universe
You’ve read about how originally there was nothing, and then suddenly….BOOM! And how the Universe started expanding, etc… But when you think about it… What’s really expanding? Is it the galaxies that are moving away from each other? Or is it the space between the galaxies that’s stretching, making galaxies move farther and farther from […]
The Big Bang Theory, Part 2: Nucleosynthesis
Yes, yes, I know the title looks impressive!
Ok, so you’ve been reading about how the redshift explained the beginning of the universe. If we go back up in time, galaxies start to stick back up together (instead of spreading, they regroup, until they’re just a dense hot mixture of particles), and 13,7 billion […]
The Big Bang Theory, Part 1: Redshift
The Redshift was the first element to contradict Aristotle’s view of the universe, which is that the universe is static, never changed, and will never change (except on Earth, where things do change).
When American astronomer Edwin Hubble began to observe galaxies, he noticed that their spectra (what types of light do objects emit: mostly X […]
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