What is the Universe expanding into..

Do you think there was anything before the big bang?

  • I don't think there was anything before the Big Bang

    Votes: 56 12.5%
  • I think something existed before the Big Bang

    Votes: 200 44.7%
  • I don't think the big bang happened

    Votes: 54 12.1%
  • I think the universe is part of a mutiverse

    Votes: 201 45.0%

  • Total voters
    447
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China is hoping to commercialise thorium reactors.

When China switches on its experimental thorium reactor in Wuwei, it will be the first molten-salt reactor operating since 1969, when US researchers at the Oak Ridge National Laboratory shut theirs down.

Thorium is a weakly radioactive metal that is a waste product of the rare-earth mining industry in China, and is therefore an attractive alternative to imported uranium.

https://www.nature.com/articles/d41586-021-02459-w
 

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Thorium cycle...

A quick search reveals that the "thorium cycle" commences with non-fissionable thorium-232 being bombarded by neutrons from existing fissile material such as uranium-235.

Under neutron bombardment, the thorium-232 transmutes into highly radioactive protactinium-233, which then decays into fissionable uranium-233, an isotope of uranium that is not found in nature. It is this fissionable uranium-233 that constitutes the nuclear fuel.

It's a key factor of the LFTR (Liquid Fluoride Thorium Reactor) design that uranium-233 is produced faster than it is consumed by fission. Hence a thorium reactor qualifies as a 'breeder reactor', since it 'breeds' its own fuel.
 
I saw this 3-part Netflix series "Inside Bill's Brain" last year (among many other documentaries), in the third part Bill Gates talks about his plan to build nuclear power plants in China, because that was the only country that would consider newer nuclear plant designs. I think it was thorium, but not sure. But just as the plan was about to be implemented, the USA ("for whatever reason" - avoiding an off-topic subject) started a trade embargo with China, nixing the deal. It looks like China finally went ahead with it on their own, or something was worked out.

ETA: Bill writes a little about it here, his plant was NOT thorium: https://www.gatesnotes.com/About-Bill-Gates/How-I-test-bold-ideas

Here's the part 3 trailer:
 
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The first images from the JWST were released on Friday (Feb. 11).

There's nothing spectacular yet, just a mozaic taken during the ongoing process to align the segmented mirror.
 

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I was annoyed when I read the news that a derelict SpaceX Falcon 9 rocket (massing 4 metric tons and travelling at 2.6 km/s) will crash into the Moon on March 4 and make a crater about 19 m in diameter!

Then, in the course of reading the article, I discovered this would be no new occurrence!

I read that the Apollo Saturn 13 IVB upper stage made a 30 m wide crater when deliberately crashed on the Moon in order that vibrations detected by seismometers installed on the surface could be used to investigate the lunar interior.

https://www.space.com/spacex-rocket-crashing-into-moon-crater
 

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No they are from one and the same object - the telescope mirror segments haven't been aligned yet.

You are referring to the multiple views of HD 84406, the star that JWST scientists recently announced they had chosen to look at first.

The different mirror segments captured different views of the star as they are not yet fully aligned.
 

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