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Anyone got a favorite thing about the cosmos? I have a few, for various reasons:
=> black holes
=> GRBs
=> pillars of creation
=> spacetime curvature
Anyone got a favorite thing about the cosmos? I have a few, for various reasons:
=> black holes
=> GRBs
=> pillars of creation
=> spacetime curvature
I'm fascinated by
> Cosmic foam throughout empty space (the creation and annihilation of electron/positron pairs)
> Inflationary universe
> Just the immensity of the universe
> Space-time and gravity
ChemistB
My 2?
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ummmm....don't even know what this concept is about!Originally Posted by ChemistB
I think that's been proven for a long time. Apparently it will never stop.
did you know that, apparently, according to astronomers, the universe is actually like 30-40 billion light years across? they just say it's 13.8 billion years old because that's the further point to the edge they can see. but all evidence point to the idea that it's much more expansive. but they can't officially recognize it because the light beyond 13.8 years away hasn't had enough time to reach Earth.
space time is a huge anomaly. no one really understands it. the only thing they do know is that it's a reality. and the current thinking also is that, if one can technically travel through a wormhole, one can engage in spacetime without actually being affected by it. they say that wormholes can serve as a shortcut from anywhere to anywhere else.
and Jodi Foster probably knows that truth more than anyone! ha ha (follow the joke?)
With a couple of light buckets, my favorite part is just pointing a telescope out there and finding things to look at, while contemplating the immensity of it all.
When I was working, I had 6 or so pics of spiral galaxies under the glass on my desk...
Last edited by protonLeah; 08-27-2020 at 04:11 PM.
Ben Van Johnson
no kidding!? I think Andromeda is a spiral if I'm not mistaken, right? or are those the ones with spiral arms? I think Andromeda is more of an eliptical because it's spiral arms, if they are indeed visible, are not as prevalent as the Milky Way's (or any other galaxy they've take a picture of that apparently is just like the Milky Way's image). I always like looking at our neighbor:
heres M101 spiral and M87 elliptical. Andromeda is a spiral, not elliptical (galaxy type) it looks elliptical (shape) due the disk being viewed at an angle.
For whom interesting of space travel:
A hot trend now is:
https://www.youtube.com/watch?v=fk96cEVzv5I
Quang PT
what do you guys think of the Great Red Spot? According to the experts, it's almost the size of the Earth....
According to the experts I was listening to in a documentary recently, it used to be bigger than the Earth, but now is shrinking and may disappear altogether in time - it is being closely monitored. Even more fascinating are the five storm swirls surrounding each of the poles - more interesting to me, at least, because they are a much more recent discovery. There is a lot still to learn about the Jovian atmosphere.
Ali
Enthusiastic self-taught user of MS Excel who's always learning!
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yes no doubt about that one, Ali. by the way, did you know that if you surround yourself in red clothing, some parts of the spy satellites looking down on the Earth can't tell who you are? It has something to do with that. I'm not talking about the electromagnetic spectrum, because the red part of that, according to the astronomers in my town, is used to detect heat. So that is inescapable due to body heat inside of everyone. but the researcher I talked to 20 years ago told me about the red clothing issue. I thought that was pretty funny....
I think it's pretty funny, too - and highly suspect.
well....to be honest with you Ali, the gentleman I talked to back then wasn't the smartest researcher in the world. =(I think it's pretty funny, too - and highly suspect.
Re: my mention of Cosmic foam. The technical term is vacuum fluctuations. Pre-quantum theory, empty space was believed to be empty (no particles, no energy) but because of quantum physics and the uncertainty principle and quantum tunneling, we now know that isn't true. The quantum world is in constant fluctuation (often referred to as jitters) and through quantum tunneling, bonded particles are created (i.e. an electron and a positron). Although these particles usually annihilate each other in less than a nanosecond, sometimes they don't. It is one of the possible causes of the Big Bang.
Also, we haven't talked about dark energy and dark matter. Many of the dark matter theories relied on super symmetry but I think the LHC has put a damper on super symmetry.
If you're interested in that kind of stuff, I recommend Brian Greene's "The Fabric of the Cosmos" I'm not sure how much of it is outdated now in the rapidly expanding knowledge of the universe.
well according to everyone I've ever talked to and read about from the best institutions in the world, the dark stuff (both kinds) makes up the majority of the stuff that't out there, which is causing all of the movement.
guys, please stop posting the pics they took of the space between my ears
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Ford
LOL! you're a funny guy, boss.
If this is inappropriate, I'm sure it will be removed. But it doesn't show anything bad. Literally, for months, a federal government worker at a government building in my town (the one I work at during the evenings) had this image on her desk:
NASA finds galaxy shaped like a Star Wars Tie Fighter
https://www.foxnews.com/science/nasa...-in-deep-space
Just reading about cosmic foam now. Didn't know it was a thing!
Mars will be big and bright for the next few days, as the sun, Earth and Mars line up close to the new moon.
I am most impressed by its immensity in space. All that surrounds us has boundaries - understanding that these boundaries in space may not be beyond understanding.
Scientific American has a new interesting article on the likelihood that we are living in a simulation. I'm not sure how I feel about this.
https://www.scientificamerican.com/a...e-about-50-50/
It is certainly very strange...
Hm...
* Programs require a deliberate, purposeful, willful programmer with an objective, ....
* how many programmers did Windows, IOS, IBM360 (HAL-9000!) require...? (look how much they get wrong)
* What happens if it gets hacked and requires a patch?
Block IF without end.......
Last edited by protonLeah; 10-22-2020 at 05:30 PM.
I think if you look at this simulation as part of a true AI system that teaches and improves upon itself, rather than as a "video game" then the article makes more sense. Then the system is not necessarily only as good as its programmer. Part of the 50/50 part of the article is based on the fact that we create simulations (an example would be a weather simulator that they predicts weather patterns or programs that evaluate urban sprawl). As we learn how to improve our simulations and create true AI simulations, there may be a day where our simulations are creating simulations and then the simulations beneath that simulation and so forth.
Also, I stubbed my toe last night. Was that a glitch?
Magnetars: rare ultra-magnetic neutron starsThe magnetic field of the earth is about 0.5 Gauss, the sun about 1 gauss. The magnetic field of a magnetar can be up to 1,000,000,000,000,000 gauss (1 quadrillion)!
This type of magnetic field has crazy effects on the space around it. Normal chemistry doesn't work anymore. Covalent bonds can't hold. If you come within about 600 miles of one, you will simply dissolve.
Last edited by ChemistB; 11-13-2020 at 12:08 PM.
total lunar eclipse coming up this week. visibility maps that I've seen suggest the best visibility will be somewhere in the middle of the Pacific Ocean. Australia and New Zealand should get a decent view. East coast of Asia looks like they may catch it just at sunset/moonrise. West coast of the Americas may catch it at sunrise/moonset.
https://www.timeanddate.com/eclipse/map/2021-may-26
Given a choice, I'd go to Australia or New Zealand. Are they accepting visitors?
Galactic Filaments/Cosmic Filaments are the largest known structures in the universe. Galactic filaments form along and follow web-like strings of dark matter.
https://en.wikipedia.org/wiki/Galaxy...perclusters%20.
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