Aliens are among us says former Israeli space security chief

Ziggy your friend is right, there is a ton of stuff we don't know. Gravity was a mystery up until 2015 when the LIGO detector detected gravity waves for the first time. The theory of mass distoring space-time is now accepted even though it wasn't just a good idea, it was the law previously.

The reason that this description was accepted is because gravity is noticeable only because it acts over vast distances and instantaneously. If this were not the case we would consider gravity as just being "down". This pretty much puts it in a force category of 1. Of the 4 fundamental forces it is the only one that does not depend on particles, hence it is not limited by the speed of light. Of course the previously theorized graviton particle may be massless in which case gravity would still be instantaneous with particles travelling at infinite speeds. Of course then it would not interact with the higgs field, and in theory, would have no effect on an apple or stars and planets.

Where gravity falls down is on the quantum scale, it doesn't work. I suspect a theory of quantum gavity may blow the current gravity theory out of the water. This is probably what your friend was talking about.

At the minute we are not even close to understanding quantum gravity though there are lots of current reasearch going on.
 
Laughing said:
Ziggy your friend is right, there is a ton of stuff we don't know. Gravity was a mystery up until 2015 when the LIGO detector detected gravity waves for the first time. The theory of mass distoring space-time is now accepted even though it wasn't just a good idea, it was the law previously.

The reason that this description was accepted is because gravity is noticeable only because it acts over vast distances and instantaneously. If this were not the case we would consider gravity as just being "down". This pretty much puts it in a force category of 1. Of the 4 fundamental forces it is the only one that does not depend on particles, hence it is not limited by the speed of light. Of course the previously theorized graviton particle may be massless in which case gravity would still be instantaneous with particles travelling at infinite speeds. Of course then it would not interact with the higgs field, and in theory, would have no effect on an apple or stars and planets.

Where gravity falls down is on the quantum scale, it doesn't work. I suspect a theory of quantum gavity may blow the current gravity theory out of the water. This is probably what your friend was talking about.

At the minute we are not even close to understanding quantum gravity though there are lots of current reasearch going on.
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I watch everything there is on the subject, even read Hawkings book. I am still none the wiser.

They cannot find the matter that makes up 90% of space, and an Australian weighed the universe, evidently it is too light.

A woman from NASA a genius said don't expect me to understand distance, it's impossible to comprehend .
 
Me too SaB and a lot of it is a way of thinking and visualizing rather than just not being clever enough. A brief Histroy of Time is fairly easy though, re-read it.

I'll give you an example ofan analogy you can use to understand a difficult concept. The higgs field which gives all particles mass has some diffcult maths behind it. The maths says that the more a particle interacts with the higgs field the greater its mass is.

If you imagine the higgs field as the ocean, so the ocean becomes the known universe. Now imagine a dolphin and a man swimming in the ocean. The man is less aquadynamic so interacts with the water more, thus has more mass, the dolphin is very efficient at moving in water so interatcs less, has less mass.
 
Not so sure why ghosts get mentioned in the same threads as aliens. Legitimately alien life could and probably does exist.

There is no evidence that ghosts exist and science doesn't think so either. A lot of charlatans like you to think they exist though and they make a few quid from it too.
 
Laughing said:
With current rocket technology it would take 114,000 years to reach the nearest star, Alpha Centuri, I think. Brian Cox has also talked about this too, and we could, with enough money build rockets that could travel at about a 10th the speed of light which would mean it would take 40 years for the same Journey. We need to get to about half the speed of light to make the journey feasable and you would be slamming on the anchors about half a light year away so you didn't just shoot past.
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Proxima Centauri is the closest star, as you say over 4 light years away. But it's just an outpost on the edge of a huge area of space, with nothing much of interest there. The places where life may exist are much, much, much further away. Is there any point in building propulsion systems that can achieve a half of light speed if it would take 25K years to get anywhere interesting?
 
Laughing said:
Me too SaB and a lot of it is a way of thinking and visualizing rather than just not being clever enough. A brief Histroy of Time is fairly easy though, re-read it.

I'll give you an example ofan analogy you can use to understand a difficult concept. The higgs field which gives all particles mass has some diffcult maths behind it. The maths says that the more a particle interacts with the higgs field the greater its mass is.

If you imagine the higgs field as the ocean, so the ocean becomes the known universe. Now imagine a dolphin and a man swimming in the ocean. The man is less aquadynamic so interacts with the water more, thus has more mass, the dolphin is very efficient at moving in water so interatcs less, has less mass.
Click to expand...
I can understand the mass, I think.

His explanation of the table tennis ball on the train was very clever.

The thought of the universe being light was fantastic . He stated that it proves that the universe is not curved. Then last week there are new photos proving it is at the edges.
 
With theories like this, that include a section claiming "the government are keeping it all quiet until humans are ready to hear about the aliens", I always wonder what they mean by ready?

There's been sci fi books and movies and tv shows for a century already. If we're not ready now when would we be? What wouldn't people be able to comprehend?
 
SuperStu said:
With theories like this, that include a section claiming "the government are keeping it all quiet until humans are ready to hear about the aliens", I always wonder what they mean by ready?

There's been sci fi books and movies and tv shows for a century already. If we're not ready now when would we be? What wouldn't people be able to comprehend?
Click to expand...

A large percentage of the UK population aren't ready for humans on a dinghy.......
 
SuperStu said:
With theories like this, that include a section claiming "the government are keeping it all quiet until humans are ready to hear about the aliens", I always wonder what they mean by ready?

There's been sci fi books and movies and tv shows for a century already. If we're not ready now when would we be? What wouldn't people be able to comprehend?
Click to expand...

Maybe once we abandon religion
 
Laughing said:
Ziggy your friend is right, there is a ton of stuff we don't know. Gravity was a mystery up until 2015 when the LIGO detector detected gravity waves for the first time. The theory of mass distoring space-time is now accepted even though it wasn't just a good idea, it was the law previously.

The reason that this description was accepted is because gravity is noticeable only because it acts over vast distances and instantaneously. If this were not the case we would consider gravity as just being "down". This pretty much puts it in a force category of 1. Of the 4 fundamental forces it is the only one that does not depend on particles, hence it is not limited by the speed of light. Of course the previously theorized graviton particle may be massless in which case gravity would still be instantaneous with particles travelling at infinite speeds. Of course then it would not interact with the higgs field, and in theory, would have no effect on an apple or stars and planets.

Where gravity falls down is on the quantum scale, it doesn't work. I suspect a theory of quantum gavity may blow the current gravity theory out of the water. This is probably what your friend was talking about.

At the minute we are not even close to understanding quantum gravity though there are lots of current reasearch going on.
Click to expand...

That's interesting because I did once ask him how much we actually knew, in percentage terms what we actually knew or understood about what surrounds us.
He smiled and said 1-2% but closer too 1.
Given that what we don't understand, and the fact there's much that we haven't even got a name for...and this in just in the neighbourhood. Baby steps he reckons. But like you he mentioned that all aspects of Quantum research will prove outcomes that will ultimately change everything.
I did ask him about Quantum/ Consciousness. He wouldn't go there.😉
 
Ziggy said:
That's interesting because I did once ask him how much we actually knew, in percentage terms what we actually knew or understood about what surrounds us.
He smiled and said 1-2% but closer too 1.
Given that what we don't understand, and the fact there's much that we haven't even got a name for...and this in just in the neighbourhood. Baby steps he reckons. But like you he mentioned that all aspects of Quantum research will prove outcomes that will ultimately change everything.
I did ask him about Quantum/ Consciousness. He wouldn't go there.😉
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If you accept that Dark Matter and Dark Energy (whatever they are, if they exist) constitute together 97% of the Universe, as has been proposed, that leaves 3% because we know nothing about the other 97%. We understand a tiny fraction of that 3% although we try hard. I'd say 1% is a big overestimate.
 
FartingGnome said:
If you accept that Dark Matter and Dark Energy (whatever they are, if they exist) constitute together 97% of the Universe, as has been proposed, that leaves 3%. We understand a tiny fraction of that 3% although we try hard. I'd say 1% is a big overestimate.
Click to expand...
Lots of physics bods, I couldn't spell fissassits and neither could my phone, believe we are not far away from a theory of everything, which will include dark matter. Dark matter for all its mysterious name is just matter that doesn't interact with the electromagnetic force. This makes it impossible to detect currently with our instrumentation. We infer there is matter that possess mass because of the gravitational effects we see.

Dark matter only accounts for roughly 27% of the mass in the Universe not 99%. Oddly enough stars and planets only account for 5%of the matter in the Universe. The rest is dark energy, this is the matter in the universe that causes the universe to expand. Its oddest property is it is uniformly spread having no net gravitational effect and remains constant regardless of the size of the Universe. Its the bread in Hawkins raisin loaf analogy.

Edit gnome I just read your post apologies you did include dark energy. Though its still not quite 97% more like 95%
 
Lizard pluto isn't even a planet and they would still out fox Johnson. Also can you imagine the queue of rockets in Kent, probably with shipping containers full of plutonians who will jump right to the front of the housing queue because a third eye in the middle of their heads is considered a disability.
 
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