Big Bang.
Quick Hits
10 random key ideas.
1.
In shaping modern cosmology, Galileo articulated the relativity principle in 1632, Newton made gravity universal in 1687, and Einstein revealed gravity as the curvature of spacetime in 1915.
2.
From History: 13.8 Billion Years Ago
13.8 billion years ago, space itself began expanding and cooling, setting the stage for particles, atoms, stars, galaxies, planets, life, and us.
3.
Science advances when bold ideas and strange observations finally connect.
4.
From History: 13.4 Billion Years Ago
Galaxies formed early in cosmic history, within a few hundred million years of the Big Bang.
5.
Fred Hoyle gave the Big Bang its famous name while arguing against it. He later said it was more of a jab than an actual insult.
6.
Physicists often talk about the idea that the universe exploded from nothing in a singularity, that idea is more philosophical than scientic. The universe’s expansion is scientific, the singularity itself remains speculative.
7.
Article summary:
ΛCDM remains the leading cosmological model because our current best measurements indicate gravity is not strong enough to stop the universe’s expansion.
8.
Article summary:
We do not know the ultimate fate of the universe, but the leading ideas are that it expands forever, collapses and starts over, or ends in something more extreme.
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