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Physics and astronomy thread (2 Viewers)

Galileo said:
Juno mission is extended for another 3 years.  More splendid photos!!  The shot here is from only 9600 miles above the "surface"
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Cloud porn.  :reported:

Galileo said:
And let's push it back even further... looking at 2021 now  :( :(
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Ugh - at this point I think the delays are just so Goddard has something to do.  

Really looking forward to seeing this go up.  My place of work developed a "most accurate instrument in the world" to measure stuff on James Webb.  Also really looking forward to Solar Probe Plus.  I had a big (really freaking hard) project to help that one get off the ground.

 
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Phil Elliott said:
How many moons is too many? Jupiter has 12 more for a total of 79  Discovered a year ago but took a while to confirm they were in fixed orbits.
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Astronomers discover 12 new moons orbiting Jupiter - one on collision course with the others

A head-on collision between two Jovian moons would create a crash so large it would be visible from earth
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:pickle:

Which raises the question of how long the tiny moon has left. “Collisions don’t happen all that frequently, every billion years or so,” said Sheppard. “If one did happen, we would be able to detect it from Earth, but it is unlikely to happen anytime soon.”
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:sadbanana:

 
SpaceX cameras >>>>>>>>>>>>>>>>>>>>> Blue origin 

 
The taurid meteor stream.

Sorry if repost I “searched” the thread but didn’t find it in here. I came across this guy on, of all places, on Joe Rogan’s podcast. (Ep. 725).

He has proven that we pass through a meteor stream twice a year at 12 days each pass. And the real possibility exists that the earth can and will be hit again with an extinction level meteor strike. The podcast was an incredible listen. 

 
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Billy Bats said:
The taurid meteor stream.

Sorry if repost I “searched” the thread but didn’t find it in here. I came across this guy on, of all places, on Joe Rogan’s podcast. (Ep. 725).

He has proven that we pass through a meteor stream twice a year at 12 days each pass. And the real possibility exists that the earth can and will be hit again with an extinction level meteor strike. The podcast was an incredible listen. 
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I haven't heard the podcast but that impact hypothesis has been shown to be poorly researched and widely debunked.

 
Billy Bats said:
The taurid meteor stream.

Sorry if repost I “searched” the thread but didn’t find it in here. I came across this guy on, of all places, on Joe Rogan’s podcast. (Ep. 725).

He has proven that we pass through a meteor stream twice a year at 12 days each pass. And the real possibility exists that the earth can and will be hit again with an extinction level meteor strike. The podcast was an incredible listen. 
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An "alternative historian"???  What the f*** is that?

 
jamny said:
I haven't heard the podcast but that impact hypothesis has been shown to be poorly researched and widely debunked.
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I’m no expert but the podcast explains their research and how their findings don’t fit into what geologists, archaeologists, etc believe what has happened to the planet. It’s interesting nonetheless. 

 
Galileo said:
An "alternative historian"???  What the f*** is that?
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:lol:   Someone doing research on his own, going against the scholars. Listen to the podcast if you get a chance, it’s all explained. Whether it’s true? I’m no expert but I found it very interesting. 

 
Billy Bats said:
I’m no expert but the podcast explains their research and how their findings don’t fit into what geologists, archaeologists, etc believe what has happened to the planet. It’s interesting nonetheless. 
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It is an interesting theory to a big question but I think those still pushing it are just too invested in it to accept the results of studies disproving it. There's no proof of an impact event and the extinctions occurred over hundreds to thousands of years across North and South America. Mammoth went extinct but bison and other large mammals didn't. Some species were already in a rapid decline long before the supposed impact event. And I can see the Clovis people being decimated during the cold and forced south only to head back north afterwards with more advanced Folsom technology, although I'm not sure what the latest thinking is on that.

I don't doubt that one day we'll be hit by a major impact though.

 
For The First Time, Scientists Have Accelerated Electrons in a Plasma Wave

This will mean that they can have smaller and cheaper particle accelerators 

Right now, if you want to install a Large Hadron Collider (LHC) particle accelerator in your back garden, you need a concrete tunnel about 27 kilometres (nearly 17 miles) long and US$5 billion in spare change.

But this new experiment uses something known as plasma wakefield acceleration – and it takes up just 10 metres or 33 feet of space. 
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:shock:

 
SETI scientists spot 72 signals 'from alien galaxy' 3bn light years away

Scientists do not yet know what causes the mysterious fast radio bursts, but a form of alien transportation has been suggested.

Scientists searching for extraterrestrial life say they have spotted 72 mysterious signals from an alien galaxy using artificial intelligence (AI).

The researchers at the SETI (Search for Extraterrestrial Intelligence) Institute discovered the unusual signals when examining 400 terabytes of radio data from a dwarf galaxy three billion light years away from Earth.

Almost all artificial intelligence technology involves automating data analysis, combing through huge data sets to identify patterns or unusual occurrences.

The signals they spotted - fast radio bursts (FRBs) - are bright and quick pulses which were first discovered in 2007 and are believed to come from distant galaxies, although it is not yet know what causes them.

"The nature of the object emitting them is unknown," SETI said, adding: "There are many theories, including that they could be the signatures of technology developed by extraterrestrial intelligent life."

:tinfoilhat:

 
IN THEATERS SEP 29, OCT 3

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As NASA celebrates its 60th anniversary, Discovery shines a spotlight on the historic institution taking us to the moon, to the surface of Mars, to the outer edge of our solar system and beyond. ABOVE AND BEYOND celebrates NASA's many accomplishments in space and catapults viewers forward to where its headed in the future. Directed, produced, and narrated by Academy Award®-nominated and Emmy®-winning Rory Kennedy ("Last Days of Vietnam,") the film examines the extraordinary ways NASA has changed not only our vision of the universe, but also our planet, and ourselves.

This special event includes a custom introduction and promotional giveaway

 
badmojo1006 said:
Nuclear Pasta, the strongest material in the Universe. 10 billion times more resistant than Steel

Because of its gravitational force, it is impossible for it to form on earth, even in a Laboratory 
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What the hell does "more resistant than steel" mean?  Resistant to what?

ETA...upon further digging, I found the research paper.  The author of the article you linked never referenced a source...poor journalism, IMO.  Anyway, it seems they were "measuring" the shear modulus, a ratio of stress to strain, which is basically a measure of elasticity.  I put measure in quotes because all of this is simulation work based on a mountain of assumptions with a very limited simulator.  Interesting, but really amounts to a lot of high level speculation at this point in terms of an actual measurement.

If interested... https://arxiv.org/pdf/1807.02557.pdf 

 
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