[Q&A+] Nuking the Moon, A Week in Space, Fast Space Travel | Q&A 381
Which of out current space travel methods are the fastest? Is it better to spend a week in orbit or on the Moon? What would happen if we nuked the Moon? And in Q&A+, which animal would handle 0G the best?
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Comments (12)
I understand Venus is the second rock from the sun totally and I know everyone’s all about Mars. However I’m 100% about the moon is where we need to go to learn to live and learn on it. I know it’s a moon however, I know Venus is not the best, but I hate to break it to you humans… It would be more beneficial scientifically, and for the human well-being if we worked more scientifically on Venus terraforming Venus so once we get to the moon, I’m pretty sure that everyone’s going to come to a consensus and like 40 years maybe 60 after colonizing the moon to realize that Venus is way more capable to handle human beings and Mars that’s why they all left Mars come on now let’s get it together more signs for Venus. Thank you.
If you could hit Mars with something like Enceladus that would probably work.
Earth heats up some from tidal flexing as it rotates thru the bulge (not sure how much). The Moon, not really, because it's tidally locked. The moons of Jupiter get theirs due to interactions with the other moons.
I mean the obvious best propulsion method would be the Project Orion system from the 50s. There would be no drawbacks, just tons of acceleration. What could possibly go wrong?
I currently pay for quite a lot of news, but not from any independent journalists. Well Fraser, but he's not exactly independent, is he? I have digital subscriptions to the NY Times, the Washington Post, and the Wall Street Journal because I was offered those subscriptions for $4 or $5/month. That is about what it is worth to me to be able to follow an occasional links to one of their articles and read it on those websites. After a year, the price usually goes way up and I cancel, then I get a special offer to resubscribe for $4 or $5/month. If you don't count my live TV subscription, the most expensive news I pay for is a premium membership to The Dispatch. For those unaware, The Dispatch is a right-of-center online news organization founded by conservative “Never Trump” opinion writers Jonah Goldberg and Steve Hayes during Trump's first term. They publish a daily newsletter as well as hosting many wonderful writers. I also watch Special Report with Brett Baier on FNC weekdays. That is mostly out of habit at this point since I have been recording and watching Special Report for almost 30 years. I believe the journalists on the channel, as opposed to the prime time personalities, work hard to be fair and balanced, but too many stories that are critical of Trump are downplayed, if reported at all. FNC might be the highest-rated and most profitable news channel, but the stuff that came out during the Dominion lawsuit makes it clear that management is scared that their audience will depart for even more conservative news channels like Newsmax if they are too critical of Trump. I could blame Trump for what's happened to FNC, and he deserves the lion's share of the blame, but he's been enabled by too many politicians unwilling to lose primaries to do the right thing. Of course, it's hard to expect anything else from politicians. I am thoroughly disgusted by the Republican Party, but I believe too many policies advocated by Democrats are bad for the country. Regardless of your ideological views, I hope you see that this country needs two functional parties to prosper. The damage to the Republican Party has caused the Democratic Party to move further to the left. The massive increase in spending under Biden led to runaway inflation that, combined with the chaos at the border, allowed Trump to win reelection. We need to find some way to incentivize both parties to reach more compromises. OK, I'll get off my soapbox now.
What would happen if large asteroid impacted Venus?
When the USSR beat the USA to space there was a proposal to nuke the moon by the Americans just to show off.
I'm just wondering if you have contacted David Wilshire about interviewing him? I would be fascinated to hear about his explanation of timescape cosmology and how it addresses the Hubble tension.
at 7:18 "Yeah. We have the Voyagers!" is funny I think
I have a follow-up question to which animal would do best in space. What would a fish experience in a sealed tank in weightlessness since on Earth neutral buoyancy is used to mimic weightlessness? Obviously there would be no "up" for the fish, but I wonder if that would matter.
In terms of methods of speed, you could also include gravitational slingshots and Oberth effect. A physicist would probably tell you atmospheric braking gives you a huge acceleration and deltav.. :) but it does also save fuel which in practical terms make faster trips possible.
Q What is the maximum velocity attainable through a solar Oberth effect trajectory? Al Overview The maximum velocity attainable through a solar Oberth effect trajectory is theoretically around 350 km/s (over 1.26 million km/h), and potentially up to 100 km/s with current technology concepts, but it depends heavily on the heat shield technology and fuel used. The actual speed achieved by a spacecraft is limited by the physical constraints of materials and propulsion syste Heat Tolerance: To maximize the Oberth effect, a spacecraft must get extremely close to the Sun (a "powered dive") to reach maximum initial speed before the engine burn. The primary limitation is the ability of the spacecraft's heat shield and cooling systems to withstand the extreme temperatures and solar radiation near the Sun. Propulsion Efficiency: The effectiveness of the Oberth maneuver relies on performing a high-thrust burn in a short amount of time at the point of maximum speed (perihelion). High-thrust chemical rockets are best suited for this, but even they have limits on their total change in velocity (Δυ). Current Records: The fastest object ever built, the Parker Solar Probe, uses the Sun's gravity to reach speeds of approximately 192.22 km/s (700,000 km/h or 435,000 mph) during its closest approaches, though this is via gravity assists and not a powered Oberth maneuver with a chemical rocket burn at perihelion. The probe is not using its own engines for a significant prograde burn at perihelion to leave the solar system, but rather is using Venus gravity assists to adjust its orbit around the Sun. Theoretical concepts combining solar sails and a solar Oberth maneuver suggest speeds of up to 350 km/s might be possible with advanced technology.