-
Posts
261 -
Joined
-
Last visited
Content Type
Profiles
Forums
Events
Everything posted by JohnStu
-
Why do Hurricanes so resemble spiral Galaxies?
JohnStu replied to Ronald Hyde's topic in Classical Physics
doesn't look similar to me. Lots of things look alike if one looks at it with blurry vision. -
Rotation? Galaxies are not all spiral. The epliptical galaxies are not rotating like a disk.
-
Hmm, not mostly, just few of them were once part of a bigger asteroid. Most of them are just chunks of rocks that never fell into a nearby big object such as a planet
-
Yes, for a very very long time, but not forever if nothing get in its way.
-
How far will we progress toward human physical immortality
JohnStu replied to Alan McDougall's topic in Genetics
I'd rather seek spiritual immortality anyday. The body is merely an mud shell for the real beautiful stuff -
Good thinking and knowledge you have there. I see space-time as something that does not stretch. If it does stretch, it has to be a "medium". If space-time stretches then the space of space-time is static, then what is actually space ha.
-
How far will we progress toward human physical immortality
JohnStu replied to Alan McDougall's topic in Genetics
Being immortal means being eventually out-evolved by a group that refreshes its gene quickly -
Quantum computing? There is a prototype version of it in my lab. The semiconductor (is a protein) has 6 states, so it will be based on 6 digits if only I could find a way to mass produce these proteins cheaply and put them to the proper places.
-
I am not a native English speaker. Is entropy the desire of matter to become colder and colder? Lone tiny planets (without stars) would have their life forms wiped out due to entropy, given enough time that is
-
Topic: redshift Two influencers in redshift: doppler effect and expansion of space-time One result: redshifted or blueshifted
-
Do infinite space models contradict Olber's paradox?
JohnStu replied to Huldrich's topic in Astronomy and Cosmology
Didn't stars not form until after the Big Bang? Thus stars 13.5 billion aprox plus light years away don't have their brightness -
Rephrasing your question into: Is light emitted from a star travelling at half of c faster on one side and slower on the other? Dont think so. I remember reading an experiment to test this some years ago, the experiment showed no changes in light speed.
-
quick question on telescopes and stars
JohnStu replied to gebreab's topic in Astronomy and Cosmology
did u say surface of a star? stars don't have fancy surfaces except "lower temperature regions" which are called sun spots -
Good that he has done such research. I have done further research on it in one of my paper. There exists no direct coorelation between the constants and the scale of things. And on gravity: gravity is a drug-force in my opinion. The reason I call it drug-force is because it distorts or at least misdirect researchers' views. Imagine a parallel universe where there are only magnets and that each planet is a pure magnet as well, would gravity remain an important force or would the definition of gravity in that universe be different
-
Good thinking. My version is that blackhole does eject matter. However, because of its strong gravity, the ejected material with not enough escape velocity end up coming back, and the ones with fast enough velocity end up totally escaping and travelling in a total straight line eventually. This version does seem more detailed isn't it. I recommend readings on conservation of momentum of elastic collisions. It's good read for all physics enthusiasts. That is the actual core of Newtonian physics I believe.
- 11 replies
-
-1
-
I doubt the medium in the universe is electric, or charged. a totally charged medium means a lot of things. but so far, no observations of "charged" influence in the universe. much of the stuff around electromagnetism is still mystery at the fundamental level, so you might be partially right The interesting thing about the universe is that it takes energy to move a mass. Since energy is mass, and mass is energy. That sentence can be altered to it takes mass to move energy. Quite funny
-
Yes quite possible. There still exists much mystery around topics of redshift of light, spacetime, blackholes etc..
-
hold on, the sun does not emit hydrogen atoms. It emits charged ions or hydrogen parts. At least I don't think the sun emits hydrogen atoms that much, percentage-wise.
-
Could Planet X be made of dark matter?
JohnStu replied to Sullinger's topic in Astronomy and Cosmology
doubt it highly (100% actually haha) -
High Energy Cosmic Rays and the Origin of Life
JohnStu replied to deepnessdawn's topic in Astronomy and Cosmology
The advocators of Darwin's theory do not qualify to speak as Darwin. They are not entirely right on that statement in this post. Where did you get that diagram from, I doubt only a UV photon can alter a DNA like that, it's been proven that visible light photons even penetrate cell walls. -
Supernova Remnants: the Formation of the Earth?
JohnStu replied to deepnessdawn's topic in Astronomy and Cosmology
It's not that earth has a lot of iron, but that most the hydrogen gas couldn't "stick". The result in 4.5 billion years is an iron core with little atmosphere. -
Question about Compression/Decompression
JohnStu replied to Richard Perkins's topic in Astronomy and Cosmology
yes, if it is made of thin sheet of aluminum or anything that is not strong enough. Current spacecraft can handle air pressure or depressure with no scratches -
no hydrogen atom exists on earth though. They exist in the form of hydrogen-something(s)
-
a lot of international students stay because it has better environment. The lure of better environment often is treated as better job opportunity. Some go entirely for the state benefits to be honest