I'm over a month late posting this, but for those who haven't heard, there's this new JWST (James Webb Space Telescope) and PBS Nova's latest episode is on it:
So are telescope sizes named like standard radio frequency bands? VLF, LF, MF, HF, VHF, UHF, ...
https://en.wikipedia.org/wiki/Radio_spectrum
Unfortunately, the video flags up as unavailable in my country.
Something like that...
Different telescope types are designed to detect different frequencies, or wavelengths, of the electromagnetic radiation.
Hence we have radio, microwave, infrared, visible light, ultraviolet, X-ray and gamma ray telescopes (see attachment).
To maintain a given resolving power, the aperture of a telescope must increase with the wavelength of the radiation. That's why radio telescopes tend to have larger diameters (or effective diameters) than, say, visible light telescopes.
Attachments
VLT = very large telescope
ELT = extremely etc
OWL = outstandingly etc (this scope is no longer being built)
These are the names given by the ESO
ELT = extremely etc
OWL = outstandingly etc (this scope is no longer being built)
These are the names given by the ESO
Sorry for correcting you, Bonsai, and well done in making a better attempt at answering benb's question than I did!
Looking at Steve's chart showing the various telescopes, I could see no connection between telescope names and the way frequency bands are named, but now understand what benb was getting at.
Looking at Steve's chart showing the various telescopes, I could see no connection between telescope names and the way frequency bands are named, but now understand what benb was getting at.
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No problem. I occasionally need correcting 🙂
If I was a an Elon Musk or a Jeff Bezos, I'd be funding the OWL and putting money into the GMT rather than doing some of the stuff they are doing. Leave Twitter to the twiterati I say.
If I was a an Elon Musk or a Jeff Bezos, I'd be funding the OWL and putting money into the GMT rather than doing some of the stuff they are doing. Leave Twitter to the twiterati I say.
I just found out this is a thing: Relatavistic Quantum Chemistry
Check out why gold is not silvery in colour and the explanation for why tin-lead battery’s don’t work
https://en.m.wikipedia.org/wiki/Relativistic_quantum_chemistry
Check out why gold is not silvery in colour and the explanation for why tin-lead battery’s don’t work
https://en.m.wikipedia.org/wiki/Relativistic_quantum_chemistry
What? 😵
Electrons do not orbit.
Electrons do not spin.
We know not where they're going.
We know not where they’ve been.
"Curiouser and curiouser!" cried Alice.
Engineering glitches have confounded system7 this weekend. My Virgin mobile broadband crashed again! This caused severe typographical and semantic errors in my normally sound English! 🙄
Why? Well those scoundrels at Virgin Mobile are in the usual state of Corporate Denial, but their hopeless and poorly designed network was completely overloaded by an influx of thousands of Pop fans at the famous Portsmouth Victorious Pop Festival.
As soon as the Pop Festival closed, my Internet is back online. So here I am again. 😀
Having pretty much exhausted the topic of telescopes, I feel we should get back to General Relativity and Black Holes. This is the Schwarzchild solution to Black Holes. A subject upon which Doctor Becky has written a book. No, I don't know if I will buy it... just order it from the Library.
IMO, you are a Doctor Sabine fan, or a Doctor Becky fan...
I was out late last night, and it's True. Red Planet Mars is scarcely a whisker away from Red Aldeberan in the Eastern Sky! The brightest star in Taurus. Fascinating.
Why? Well those scoundrels at Virgin Mobile are in the usual state of Corporate Denial, but their hopeless and poorly designed network was completely overloaded by an influx of thousands of Pop fans at the famous Portsmouth Victorious Pop Festival.
As soon as the Pop Festival closed, my Internet is back online. So here I am again. 😀
Having pretty much exhausted the topic of telescopes, I feel we should get back to General Relativity and Black Holes. This is the Schwarzchild solution to Black Holes. A subject upon which Doctor Becky has written a book. No, I don't know if I will buy it... just order it from the Library.
IMO, you are a Doctor Sabine fan, or a Doctor Becky fan...
I was out late last night, and it's True. Red Planet Mars is scarcely a whisker away from Red Aldeberan in the Eastern Sky! The brightest star in Taurus. Fascinating.
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Steve, why choose, they’re both excellent. Although I must say Beckie’s enthusiasm is quite contagious.
Don’t know if I’ve put this up before. Ethan Siegal
https://bigthink.com/starts-with-a-bang/5-ideas-astronomy-overturned/
https://bigthink.com/starts-with-a-bang/5-ideas-astronomy-overturned/
The article is dated August 29, 2022 and I certainly haven't seen it.
I see it mentions some concepts we've discussed in this thread, such as the possibility of the Big Crunch (don't tell TNT!), quintessence and primordeal black holes. Also something I read about recently - that no exoplanets have been found in globular star clusters.
Yes, there are Big Issues that remain to be settled!
My statement that "no" exoplanets have yet been discovered in globular star clusters should be changed to "next to no"!
Last year, astronomers managed to find one exoplanet in globular star cluster Messier 4, one of 150 such clusters that inhabit the Milky Way.
M4 is 5,500 light-years away, which is over five times the distance of the majority of exoplanets we’ve found so far. So it's perhaps not so surprising that we've discovered next to no exoplanets in globular star clusters.
https://astronomy.com/magazine/ask-...oplanets-discovered-in-globular-star-clusters
Last year, astronomers managed to find one exoplanet in globular star cluster Messier 4, one of 150 such clusters that inhabit the Milky Way.
M4 is 5,500 light-years away, which is over five times the distance of the majority of exoplanets we’ve found so far. So it's perhaps not so surprising that we've discovered next to no exoplanets in globular star clusters.
https://astronomy.com/magazine/ask-...oplanets-discovered-in-globular-star-clusters
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