Recent content by xpell

Huh... OK, thank you, Hutch, but as you said, that's nothing to do with my question. I would have been able to calculate your answer myself without the need to ask here. Only that it's not an answer to my question, not even if a "back-of-the-envelope" roughly approximate answer using a...

Well... that: Please, could you please assist me in obtaining a rough estimate of the distance from the Sun at which a planet resembling Venus or a hypothetical Venus-like planet (for the sake of simplicity) would have a habitable-zone surface temperature? A "back-of-the-envelope" educated...

This is not for any kind of homework ---the last time that I went to school was 30+ years ago. However, I am a curious person, I've been asked by other people who know that I love science and I need to calculate this: As you will most possibly know, a misreading of this paper by the media...

Yes I have, and I didn't find anything useful. That's why I came to ask. Indeed. Yep, that's the kind of info I found ---useless without the discharge time. Also in volts, in amps... but never in joules or anything that let me calculate the joules. :frown:

Hi! I would be interested in properly referenced data about the most powerful / energetic lightning bolts on Earth to get a good idea about their maximum possible order of magnitude (maybe depending on location?) Both direct measurements or indirect but well-founded estimates (e.g. satellite...

Hi! I was watching satellite pics of the Earth and I noticed that continuous cover clouds can be really large. So... I felt curious and my question is obvious: Please, does anybody know how large can a cover cloud be on planet Earth, or at least a few of the largest measured ones? (Not...

Hey, thank you, I didn't know this! Would you please tell me more or point me to further reading about it?

Hi! After watching a couple videos about the explosive reaction of sodium in freshwater and seawater, I felt curious and wanted to calculate how much energy is released. However, my Chemistry is super rusty and I think that my result is way too high (equivalent to almost 2 g of TNT per gram of...

Thank you again, Dave. :smile: This part was especially important for me. I didn't want to pass for an ignorant just by asking, "Hey, what if that big guy had another moon or a couple of them?" and be slammed with an avalanche of, "Are you silly?! That is totally impossible because of this...

Thank you very very much again, Astronuc. :smile::smile: That is exactly what I needed to know. Well, it seems to be a NASA or NASA-affiliated idea, originally based on one of several Soviet concepts for a "Venerakhod", so I lend it some credence, but sure you'll be able to discern it better...

Hi, Dave, thank you very much. Yes, I fully agree that: Indeed. However, my question (in my mind, at least...) was more like, "If it had happened, do we have the tools to learn or deduct that it did? What are those tools? Or would it be immediately obvious because this-and-that?"

Hi! I'm fascinated by the apparent "concentration" of the four large Galilean moons in a barely 1.5 million km "strip", and the vast, "empty" distance to the next moons (moonlets?) Out of a purely aesthetic sense of horror vacui, :wink: I've always wondered if there was at least another Jovian...

Thank you very very much, Astronuc, this is exactly the kind of thing that I had it mind. Just one (key) question, please: I didn't understand this, my knowledge is limited as I said. :frown: And it's obviously very important. Would you be so kind to explain it "for dummies", please? Yes...

Fully agreed. I'll leave the specific engineering details to the geniuses. :smile: But, if it would conceptually work, couldn't it be used to Stirling-refrigerate a chamber and keep the electronics and other stuff protected there or the like?

Hi. I'm just a curious person with high-school-level scientific knowledge. However, I was wondering if a specially-engineered Generation IV high or very high temperature (800-1,000ºC) nuclear reactor could work in Venus using the local atmosphere at 450ºC as "coolant", just like a "typical"...