Comments by "Tony Wilson" (@tonywilson4713) on "There are no known habitable exoplanets" video.

  1. Kyle Hill did a fantastic video on the subject a few months back. He explained the YouTube business model favors garbage click bait channels because every time someone clicks on a link they also get a tiny amount of advertising revenue. By producing 1,000s of AI generated videos and generating millions of clicks those tiny bits of revenue add up. Until the advertisers who actually fund YouTube make a stand and get YouTube to prevent the AI generated garbage NOTHING will change.
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  2. AEROSPACE ENGINEER HERE - This is one of the best and straight forward videos I have seen on YouTube regarding a STEM topic. There is NOTHING wrong with the title. For a planet to be habitable it has to have the most basic thing of all which is a suitable atmosphere and RIGHT NOW we don't YET have the technology to confirm a habitable atmosphere. I did my degree in the late 80s and in my final year we had a number of guest lectures. I remember 2 of those. One was an aerodynamicist from the X-29 forward swept wing experimental plane that was just the coolest plane of the era. The other was a NASA engineer who'd just done a study on what it would take to terraform Mars. At that time, even though the Challenger accident had happened, we still expected to built Space Station Freedom in the 1990s, go back to the Moon in the 2000s and then onto mars in the 2010s. So we were seriously excited to hear about what we'd be doing on Mars. His opening line was "Sorry. Its impossible and here's why!" He then introduced us to 2 topics which I now call Planetary Mechanics and Planetary Dynamics (which we know next to nothing about what we'd need to do). Planetary Mechanics is reasonably easy to understand as its about: how much stuff do you need to do certain things? How much air? How much water? How much heat do you need to gain or lose to get the planet to the right temperature? Planetary Dynamics is: how do you make all that stuff do the things you want it to do? How do you make the gas cycles work? How do you make the water cycle work? How do you trap enough heat form the star while losing enough to space to keep the planet in a reasonable temperature range? Its basically all the stuff we know about but almost NOTHING about how those systems actually work because they are all interlinked. In that lecture we never really got into any discussion on Planetary Dynamics because the issues with Planetary Mechanics simply killed the idea of terraforming Mars. Once you realise it takes 178 Trillion tons of air just to put the first 1 kilometer of air around Mars the discussion ends. Its a logistics nightmare. Either the planet you want to terraform has enough atmosphere you can convert or its game over before you consider anything else. Just trying to answer the question - Where do you get 178 Trillion tons of air from? Let alone how you deliver it? Is a project killer. This is how I expose people when they talk about colonising Mars. Other than all the how do you get the people there issues, there's the simple logistics of where to they live when they get there. Because Mat Damon's tent form "the Martian" wont work because how does that protect from the radiation? Then there's the how to you grow food? Because Mars soil is laced with perchlorates. Where do you get water? Because plants and people need water. But the real conversation killer is: Where do you get the air? Its going to be the same for ANY planet that we want to consider as being habitable. Its going to have to have those basic things. - Size so we know its got suitable gravity. - Distance from its star so we know its got the right temperature. - A viable atmosphere that's already there. - ENOUGH water to provide a water cycle AND thermohaline circulation. - At least one natural satellite large enough to help drive the thermohaline circulation. That final point of the thermohaline circulation is something that we have only just begun to understand how it works here on planet Earth as well as how important it is for life to exist here. That's things like the AMOC and Gulf Stream that keep our planet viable. If you don't have a planet that has that then how do you build something like ? Sorry for my rant, but I really liked your video and would NOT change anything including the title. It wasn't click bait.
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  3.  @GruntoSkunko  How is it clickbait? Can you name a single exo-planet that we KNOW is habitable? I MEAN KNOW NOT conjecture NOT theory NOT Hollywood sci-fi or media hype BUT ACTUALLY KNOW
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  4.  @GruntoSkunko  Were you born this stupid or did you take classes because that's the MOST IGN0RANT reply I have just about ever seen on any technical subject. If you have to live inside a pressurized habitat then ITS NOT A HABITABLE PLANET.
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  5.  @Hauke-ph5ui  that's a well balanced well nuanced comment
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  6.  @basedtortellini  great point
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