How is there no center of the universe? |
- How is there no center of the universe?
- Do the children of women who suffer from fertility problems have a higher chance of being disabled in any way?
- With a high enough powered telescope and knowing where to look, would a person be able to see the artifacts left behind on the moon by the Apollo astronauts?
- How do things tie themselves up?
- How is Earth 4.6 billion years old? What would it have looked like in its proverbial first birthday?
- What are the differences between how IBM's Deep Blue was programmed when it beat Kasparov vs. Google's Deepmind when it beat Lee Se-dol?
- In the absence of any meaningful gravitational field, can Einstein's theory of special relativity explain all static, dynamic, and kinematic observations?
- Are most advancements in AI from better hardware or more advanced formulae?
- Does breaking helium into hydrogen absorb energy?
- What does diets, physical and mental exercises affect cognitive functions and, if so, how?
- Had any cultures proposed that stars were other Suns further away before it was scientifically verifiable?
- Is climate change related to heat capacity of combustion product gases relative to the starting gases?
- How can I see the dark part of the moon when it is in its crescent phase?
- Why isn't the universe's age infinite?
- Are there any studies that actual show that altering screen colour temperature *actually* avoids sleep disruption?
- Reading recent articles, I get that we recently spotted the most distant/oldest galaxy ever, 13.4 billion light years away. With my understanding of the expansion of the universe, this galaxy was much closer to us than 13.4 bn ly, at the time it looked like what we see of it today. Am I correct ?
- Are there organisms with only a few cells?
- Do macrophages (and other immune defensive cells) vary in strength, size and lifespan?
- Why does old water taste "stale"?
- How does gravity bend space in 3 dimensions? The usual depictions shows only 2. (Related, what "shape" is the universe?)
| How is there no center of the universe? Posted: 10 Mar 2016 07:16 AM PST Okay, I've been trying to research this but my understanding of science is very limited and everything I read makes no sense to me. From what I'm gathering, there is no center of the universe. How is this possible? I always thought that if something can be measured, it would have to have a center. I know the universe is always expanding, but isn't it expanding from a center point? Or am I not even understanding what the Big Bang actual was? [link] [comments]  |
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| Posted: 10 Mar 2016 07:11 AM PST |
| How do things tie themselves up? Posted: 11 Mar 2016 05:43 AM PST Headphones / fibres / myself, how does it all just randomly tie itself up when left alone? Like this Edit: I always fuck up the link brackets. [link] [comments]  |
| How is Earth 4.6 billion years old? What would it have looked like in its proverbial first birthday? Posted: 11 Mar 2016 02:31 AM PST |
| Posted: 10 Mar 2016 03:41 PM PST Did Deep Blue use "learning" methods like Deepmind? What exactly are "genetic algorithms?" Why aren't we using this technology to make CPU's far more complicated but faster than what humans design? [link] [comments]  |
| Posted: 10 Mar 2016 01:29 PM PST More specifically, can special relativity model accelerating reference frames? If so, can it make predictions within the frame that is accelerating or can it only make predictions of an accelerating frame while viewing the accelerating frame from a separate inertial frame? [link] [comments]  |
| Are most advancements in AI from better hardware or more advanced formulae? Posted: 10 Mar 2016 03:12 PM PST Theoretically, a computer could brute force a problem to figure out every possible optimal solution, but that is absurdly infeasible in most instances, so systems use tricks such as classifiers and error minimization to get a "best guess." When new milestones such as Deepmind's recent victories are reached, is this more due to faster processors allowing for deeper/wider searches with existing algorithms, or have the algorithms themselves improved? (I'm sure it's a little of column A and a little of column B, buy I'm asking for a little more specific than that) [link] [comments]  |
| Does breaking helium into hydrogen absorb energy? Posted: 11 Mar 2016 04:32 AM PST If making He from H release energy does it mean that breaking an He atom will absorb energy? [link] [comments]  |
| What does diets, physical and mental exercises affect cognitive functions and, if so, how? Posted: 10 Mar 2016 05:56 PM PST What does diets, physical and mental exercises affect cognitive functions and, if so, how? Thank you, ~Waddlesticks [link] [comments]  |
| Posted: 10 Mar 2016 02:53 PM PST |
| Posted: 10 Mar 2016 01:52 PM PST I have generally good knowledge of chemistry, but I am beginning to think that I have understood the mechanism of climate change and greenhouse gases incorrectly from the beginning. I may have just learned the wrong thing early on and never looked back. Here's how I understand greenhouse gases. Let's think about combustion in its simplest form: coal combustion. C (s) + O2 (g) -> CO2 (g). The gas we started with was O2, and we exchanged one O2 mole for one CO2 mole. I always just assumed that CO2 must have a lower heat capacity than O2. Therefore, when the sun's (relatively constant) energy hits a mole of CO2, it is able to warm it up more than it would be able to warm up the mole of O2 that existed before. Hence, the temperature rises. After looking at a heat capacity table, a mole of CO2 has a higher heat capacity than a mole of O2, so this turns my whole understanding upside down. Does a gas' quality of being a greenhouse gas have anything to do with its heat capacity, or are they completely unrelated qualities? [link] [comments]  |
| How can I see the dark part of the moon when it is in its crescent phase? Posted: 10 Mar 2016 07:16 PM PST So currently in Arizona and the moon is only partially lit up but I can clearly see the rest of it. It is black but is a different black than the night sky. [link] [comments]  |
| Why isn't the universe's age infinite? Posted: 10 Mar 2016 12:51 PM PST I thought I understood this, but on longer thought it seems there's something I need cleared up. We measure the age of the universe (I believe) by backing out how long ago the universe's expansion would bring the observable universe into a single point, if run in reverse. If we imagine a timeship that somehow moves in the negative time direction, it would take (supposedly) 13.82 billion years to reach this point. But here's the kicker. We know from general relativity that a high local gravity slows your passage through time. So if we go through a region of space where there is more mass, I expect our passage through time itself to be slowed. As we go further and further back, where the universe was more dense, we move more and more "slowly" through time, never actually reaching the first instant - since this is where the density is infinite and passage through time (I expect) should be zero. So such a timeship would never be capable of reaching the first instant in time; it would instead take forever to reach the beginning. So where does my reasoning break down? Why do we say the universe has a set age, when as far as I can tell it took "infinitely long" for particles to go from infinitely dense to their current state? [link] [comments]  |
| Posted: 10 Mar 2016 08:17 AM PST There's a lot of interest in software that alters the colour temperature of screens to avoid disrupting sleep patterns - making it redder in the evening. The new beta of iOS implements it and the f.lux software is popular on Macs. [link] [comments]  |
| Posted: 10 Mar 2016 09:53 AM PST What I understand is that in 13.4 bn years (close to the universe age) light travels 13.4 bn ly. But when photons left that galaxy to reach us, their "starting point", at that time, was closer to our today position than 13.4 bn ly. So, now, that galaxy is 13.4 bn ly away from us, but was closer then. What was the actual distance at that time? I am getting confused with articles I have read, mixing both (distance and elapsed time), but I may think I understand the expansion of the universe, while I actually do not. Please enlighten me. [link] [comments]  |
| Are there organisms with only a few cells? Posted: 10 Mar 2016 10:35 AM PST I know there are lots of single-celled organisms, but even really small multicellular organisms like c. elegans or something have a lot of cells. Are there any organisms that have, say, more than 1 but fewer than 100 cells? [link] [comments]  |
| Do macrophages (and other immune defensive cells) vary in strength, size and lifespan? Posted: 10 Mar 2016 11:40 AM PST I watched a video from Kurzgesagt (in a nutshell) about how some our of immune system works. And I wondered about this question since in the video they mentioned that macrophages die after some time of fighting against the bacteria and they have to be kept living by other cells. But to the macrophages vary in those aspects? [link] [comments]  |
| Why does old water taste "stale"? Posted: 10 Mar 2016 11:05 AM PST If I leave a glass of water out for a day or more it has a distinct "stale" taste. What in the water changes? Or is it psychological? [link] [comments]  |
| Posted: 10 Mar 2016 10:45 AM PST Let's see if this makes any sense: Another redditor made this comment about the universe being "planar", and it reminded of how most depictions of gravity look something like this, which I assume is quite simplified. But if everything is 3D, how should this look as opposed to these 2D depictions? How planar really is the universe? I tend think of the universe as a giant dark room with stars/planets/galaxies etc. floating all over in three-dimensional space. Is that totally incorrect? But then thinking of it as something planar with things "sitting" on top doesn't seem right at all. [link] [comments]  |
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