I have no problem to accept the universe has no edge.
It is no more than accepting there is no temperature below absolute zero.
No more than accepting the earth has no edge because it is round. When people could only imagine the world like a flat disk, there was an edge they feared falling down.
It is no more than accepting there is no temperature below absolute zero.
No more than accepting the earth has no edge because it is round. When people could only imagine the world like a flat disk, there was an edge they feared falling down.
I am a tireless experimentialist. The Scientific Method. Test your ideas against the Universe.
Got a better result than most of you floozies. Terrible failure on street lighting on the IOW, btw. What ever were they thinking of? 😕
You guys didn't even see Comet Neowise last Summer. Abject failure, IMO.
Got a better result than most of you floozies. Terrible failure on street lighting on the IOW, btw. What ever were they thinking of? 😕
You guys didn't even see Comet Neowise last Summer. Abject failure, IMO.
I saw Neowise (northern direction) with a pair of binoculars - spectacular.
By the way Avi Loeb (Harvard astrophysics prof IIRC) believes Oumuamua was an alien spacecraft and has written a book about it. When it left the solar system it was actually accelerating (it was) so either it was very, very light with an estimated wall thickness of under 1mm and being shoved away by solar wind, or it was something else, ergo the alien spaceship theory. If it was alien, it must have been on its journey from wherever for a pretty long time.
Seems a few people got into a flap because some object from outside our solar system made a visit. Astrobiologists and fellow scientists remain unconvinced, but the man may be right . . .
Astronomer Avi Loeb Says Aliens Have Visited, and He's Not Kidding - Scientific American
By the way Avi Loeb (Harvard astrophysics prof IIRC) believes Oumuamua was an alien spacecraft and has written a book about it. When it left the solar system it was actually accelerating (it was) so either it was very, very light with an estimated wall thickness of under 1mm and being shoved away by solar wind, or it was something else, ergo the alien spaceship theory. If it was alien, it must have been on its journey from wherever for a pretty long time.
Seems a few people got into a flap because some object from outside our solar system made a visit. Astrobiologists and fellow scientists remain unconvinced, but the man may be right . . .
Astronomer Avi Loeb Says Aliens Have Visited, and He's Not Kidding - Scientific American
There are teams of physicists currently devoting time to find out exactly how other bubble universes may have formed at the time of our own universe's birth, and what might happen if those bubble universes were to collide.
Even if the bubble universes don't exist, physics may still benefit from the investigative techniques now being developed to investigate the circumstances which may have led to their formation.
It's all part of the great scientific endeavour to understand the physics of space - the baffling infinity that lies all around us.
Attachments
Seriously, could this happen? A flat disc tumbling around the Sun about to be slingshot at just the right orientation.
Given Oumuamua's small diameter, which could be as little as 100m depending on what it was made of, I doubt if there would be sufficient gravitational differential due to the Sun to account for its behaviour on leaving the solar system.
However, Oumuamua was found to be ten times as reflective as any comets that exist within our solar system. Consequently, it may have been accelerated by photon bombardment from the Sun, similar to the 'solar sail' method of propulsion which, one day, may enable spacecraft to gently accelerate out of our solar system.
However, Oumuamua was found to be ten times as reflective as any comets that exist within our solar system. Consequently, it may have been accelerated by photon bombardment from the Sun, similar to the 'solar sail' method of propulsion which, one day, may enable spacecraft to gently accelerate out of our solar system.
Reptiles get a pretty bad press in modern times. 😀
Tyrannosaurus Rex was considered to be a Bad Boy that you didn't want to meet on a Dark Night. 😱
I have always liked small Lizards. '''Smallest reptile on earth''' discovered in Madagascar - BBC News
It's the big ones that worry me.
Tyrannosaurus Rex was considered to be a Bad Boy that you didn't want to meet on a Dark Night. 😱
I have always liked small Lizards. '''Smallest reptile on earth''' discovered in Madagascar - BBC News
It's the big ones that worry me.
There's a theory that the reason the dinosaurs could withstand gravity against their incredible mass is because the Earth at that time was smaller, accumulating mass over the eons, thus ushering in their death knell. So accordingly, the Yucatan had nothing to do with their extinction. If this is a bogus theory, how can their ability to withstand the Earth's gravity be explained? Pull a whale out of the ocean and it crushes itself to death.
The age of Earth is estimated to be 4.54 ± 0.05 billion years (4.54 × 10^9 years ± 1%).
The dinosaurs extinction was about 65 millions years ago. 6.5 x 10^7 years.
Dinos, disappeared about 1% of the age of the Earth, ago.
The dinosaurs extinction was about 65 millions years ago. 6.5 x 10^7 years.
Dinos, disappeared about 1% of the age of the Earth, ago.
Right, but the theory takes into consideration that the building of the Earth by te surrounding material was not linear.
It would be interesting to find out what is known about the building of the Earth mass wise over time.
I imagine there was no large change of mass over the last few % of Earth forming.
I imagine there was no large change of mass over the last few % of Earth forming.
What theory? Perhaps just a wild conjecture, a scientific theory is supported by substantiating evidence.
Mchambin is right. The earth was at around its current size give or take a few % by 500 million yrs after its birth. So > 85% of its life it’s been 6^24 kg.
I don’t think the dinosaurs were affected by any changes in its mass 😉
I don’t think the dinosaurs were affected by any changes in its mass 😉
I think there will be a less dramatic explanation for Oummuamua than Avi Loeb’s aliens. I am currently firmly of the belief that intelligent life is very rare because there are some very good scientific papers out there that explain why. There others that also explain that the Milky Way is quite unique in both its age and in its chemical make-up. The latest thinking is that there are perhaps 1-2 intelligent civilizations per galaxy, but maybe less. It seems Mother Nature conspires to keep intelligences apart, and probably for good reason.
I don't recall where I came across it on the www. But what is the explanation regarding the dinos withstanding the force of gravity? A change in the gravitational field?
one wild conjecture leads to another 🙂
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