EPTAsk and answer stupid questions here! - Page 779
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zev318
Canada4306 Posts
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Zambrah
United States7371 Posts
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ComaDose
Canada10357 Posts
On November 15 2021 18:09 Simberto wrote: I could, but that would require me to first buy a car, and then pay for the upkeep of a car. Which is a lot more expensive. Especially since i don't really want to buy a combustion vehicle in 2021. sorry i didnt know how old you were | ||
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Simberto
Germany11596 Posts
I got an electric scooter now and am really happy with it. I figured out that there is a local dealership here in Munich which specializes in e-bikes and e-scooters, so i went there and let them give me advice on the spot. This also has the big advantage that i have an easy way of dealing with problems which could eventually arise. | ||
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Zambrah
United States7371 Posts
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Fecalfeast
Canada11355 Posts
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silucoku
1 Post
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Zambrah
United States7371 Posts
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ksaciec
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jafetturbo
2 Posts
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{CC}StealthBlue
United States41117 Posts
Can Black Holes fill up? Like just stop sucking etc, and thus stop being black holes? | ||
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Ciaus_Dronu
South Africa1848 Posts
On July 15 2022 07:59 {CC}StealthBlue wrote: Bump. Okay a really stupid question but it is science related. Can Black Holes fill up? Like just stop sucking etc, and thus stop being black holes? Hunting the physics / astronomy stack exchanges it would seem the answer is no. Well, at least that we know of. Given that there is no coherent theory of quantum gravity yet, a better answer is probably "we don't know, but our best tools give us no reason to believe there is." | ||
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Jockmcplop
United Kingdom9712 Posts
On July 15 2022 07:59 {CC}StealthBlue wrote: Bump. Okay a really stupid question but it is science related. Can Black Holes fill up? Like just stop sucking etc, and thus stop being black holes? Hawking radiation leaks mass from the black hole, so over trillions of years they just slowly disappear. At least that's one theory, not 100% proven but its widely seen as very likely to be real. Otherwise, the black hole can't 'fill up' because the more mass it eats the bigger it grows. | ||
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pmh
1362 Posts
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Simberto
Germany11596 Posts
Let me explain for a bit. I don't mean that my dreams all connect into a sensible narrative. However, there is one aspect in them that has been with me for at least two decades now. Flying. When i was a teenager, i started learning to fly in my dreams. I was pretty shit at it, generally not getting off the ground, sometimes taking a slightly longer jump and then falling to the ground face-first. However, over the years i got better. At some point, i managed to consistantly get off the ground, but didn't have a lot of control. I drifted away blown by the wind, or i had to use all my energy to stay afloat, basically swimming in the air like a madman. I very often could not go into the direction i wanted to go, either. However, nowadays, after about 2 decades of training in dream-flying, i am pretty good at it. I can get off the ground at the first try, control my height and direction, and generally float whereever i want. And this is not something that corresponds to a specific dream. This flying element just randomly appears in maybe half of my dreams, which otherwise deal with pretty unrelated dream stuff. Also, i am not lucid while doing this. Do you guys also have stuff like this going on? | ||
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RvB
Netherlands6243 Posts
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pmh
1362 Posts
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{CC}StealthBlue
United States41117 Posts
So in order to see the billions of potential stars would you need to be in the shadow of say another planet or moon to be able to see them? Or would you have to leave the solar system in order to get out from light so it was just another star? | ||
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Jockmcplop
United Kingdom9712 Posts
On October 02 2022 08:27 {CC}StealthBlue wrote: If you are in space is it possible to see Stars all around you or would they be blocked out by our Sun? So in order to see the billions of potential stars would you need to be in the shadow of say another planet or moon to be able to see them? Or would you have to leave the solar system in order to get out from light so it was just another star? OK I'll preface by saying I'm not an expert. I think our eyes are not sensitive enough to see the billions of stars in the galaxy. Some of them will be blocked out by other stars and most of them would just merge into single points from our perspective in the solar system. Even though they are in our galaxy these stars are so ridiculously far away they barely register as points of light in the sky. Here's a photo from the ISS that gives you an idea: + Show Spoiler + ![[image loading]](https://earthsky.org/upl/2014/08/iss006e40544-Plough-Big-Dipper-from-ISS-e1408211926229.jpg) As you can see, the view would be amazing, thousands and thousands of stars, but not billions. That would make the sky as bright as it is in daylight. | ||
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Simberto
Germany11596 Posts
On October 02 2022 08:27 {CC}StealthBlue wrote: If you are in space is it possible to see Stars all around you or would they be blocked out by our Sun? So in order to see the billions of potential stars would you need to be in the shadow of say another planet or moon to be able to see them? Or would you have to leave the solar system in order to get out from light so it was just another star? Light (usually) goes in straight lines in space. Here on earth, there is always an atmosphere which refracts or reflects parts of the light in random directions. In space, that is not the case. So unless you are looking in a direction in which there is something that can reflect the sunlight back to you (or at the sun), the sun is not your problem. The core question at this point is "how good are you at looking.", specifically, what angle things can be apart to still be resolved as different objects. You will usually not be able to tell individual stars in other galaxies apart, if you are lucky, you can get a good idea of the shape of a galaxy. The reason for this is that galaxies are usually pretty compact, but also pretty far away, which means that the angle between two stars in the same galaxy is very, very tiny from our point of view. For an idea what "being better at looking" may mean, take a look at this comparison between Hubble (pretty good at looking) and James Webb (way better at looking) https://www.transcontinentaltimes.com/webb-hubble-space/ . Both of them are absurdly better at looking than the human eye. Another thing to note is what part of the spectrum you are looking at. The further away stuff is, the more red-shifted it is, to the point that a lot of objects are simply invisible in the visible spectrum, because all of their light has been shifted to the infrared. As you can see, the view would be amazing, thousands and thousands of stars, but not billions. That would make the sky as bright as it is in daylight. This is a common misconception. Just because there are a lot of lightsources does not mean the sky would need to be bright, because each of these lightsources could be smaller and smaller due to distance. If you have thousands stars which are each 1/millionth of a suns brightness, or a billion stars at 1/trillionth of a suns brightness leads to the same total brightness. | ||
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