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Physics
This is the week the Nobel Prizes are announced, and today is the day (at least in New Zealand; first place in the world to see the light, as the tourist people say) the Physics prize is announced. And this year the odds-on favourite will be LIGO and the discovery of gravitational waves.
NASA has an undoubted ability to sell a story, and it has been making the most of the anthropomorphic appeal of this brave little $3 billion, 5 ton, plutonium-powered spacecraft on its two-decade mission. But the hype is not misplaced: Saturn has a key place in the evolving human understanding of the cosmos.
As you can guess from the title, The First Three Minutes tells the story of the moments following the Big Bang. The early universe sets the stage for the development of the cosmos we observe today, and the Cosmic Microwave Background is a key link between the distant past and the present day.
If you are trying to build a time machine, don't bother: even if we can design them, the universe makes it impossible for us (or anyone) to build them.
Just as earthquakes are the release of energy stored in subterranean faults, these gravitational waves were set in motion when two black holes – faults in space itself – became a single, stable object. Call it a spacequake.
