[Q&A+] Escaping a Black Hole, Detecting an Warp Drive Ship, JWST True Orbit | Q&A 342
If nothing escapes a black hole, how does gravity escape? Could we detect a faster-than-light spaceship cruising through the Solar System? What does JWST really orbit at L2? And in Q&A+, could the Universe have started as a black hole?
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Comments (10)
Fraser be of good cheer. You have every reason to be proud of your product. Your presentations are unfailingly informative and entertaining. When I was a youngster my father used to say "illegitimi non carborundum" which he translated for me as "Don't let the bastards grind you down". These days it can be found in Wikipedia.
I really dislike that people use the comment section on the YouTube to spew mean comments. I am not a content creator, but I have written things and had them thrown in my face with rude, hurtful comments. Thank you for kicking out useful, entertaining, and interesting content Fraser, much appreciated.
We might be able to detect that an FTL ship has already passed through the solar system, but by the time we detect the gravity waves, it will have already gone. If our technology is good enough, we might be able to detect which direction it was moving in.
Question: Space habitats vs Earth habitats. Certainly some of the space exploration and r&d for habitation is for the continuance of Humans elsewhere because "The Earth is Doomed". But the most likely scenario is about the climate and atmosphere. So why aren't (or are there?) companies developing habitats for Earth? There are already a number of problems solved: Gravity, Water, transportation and logistics ... Just have to solve for breathable air, energy and food, which will be an issue on any exo-habitat - moon, planet or space. How easy would it be to pivot the development and manufacturing?
QUESTION: How old will the universe be when the CMB is redshifted from 2mm to the wavelength of FM Radio waves, and will any sub-atomic particles still be around to witness it?
QUESTION: re Fermi Paradox. IF we assume intelligent life had to develop around F,G,and K class stars, and that it takes at least 5 B years for life to evolve from stardust to interstellar star travelers, and assuming what is widely accepted as the observable universe’s age and size, what limit does this place on how far away a galaxy can be yet be old enough (as viewed from Earth now) to be home to this advanced species. I imagine advanced life to be rare to the tune of 1 in a million galaxies, which means we are not alone, but our nearest intelligent neighbors might be so far away that the light we see from their galaxy may predate their invention of the wheel.
Hi Frasier: 10yr+ Patreon, 1st time question-asker! With Vera Rubin discovering so many new asteroids, do you think we will have more frequent stories like YR4 and Apophis in which the media gets concerned about an initial non-zero probability of impact before additional observations rule out such? How frequently do you think these stories could surface under Vera Rubin and do you think it could create greater public anxiety? Thanks!
Cool episode!
Enjoyed the video, Fraser! Good stuff. :) I really do like that you choose to take the time to actually speak with your audience on here! It's so awesome. I expect that it takes some time in order to schedule all of the video chats/interviews and that means that people will wind up waiting multiple months in order to have that opportunity. That's just my guess though! :)
QUESTION: Could it be that the reason we haven't detected intelligent life elsewhere is because advanced civilizations invariably doom themselves through narcissism, greed, and excess?
