AskScience AMA Series: We're the New Horizons team that flew past Pluto and are studying some of the oldest, farthest objects in the Solar System. Ask us anything! |
- AskScience AMA Series: We're the New Horizons team that flew past Pluto and are studying some of the oldest, farthest objects in the Solar System. Ask us anything!
- Why don’t we use metal cubes instead of ice cubes?
- Why do you start trembling/shaking if you haven’t eaten in a while?
- When do people use Planck units?
- Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology
- Why don't we see eclipses of external stars?
- Can all cases of blindness be (potentially) solved by eye transplant? Are some cases a neurological issue?
- Is it true that our body tends to store excess sugar we consume, but slough off excess vitamins in our urine? If so, why is this?
- Apollo: How did the Lunar Module measure its speed?
- Why don't clouds disperse via equilibrium?
- How fast do astrocytes migrate in a chemotaxis assay?
- Did Celsius and Fahrenheit ever meet (or correspond)?
- How do we "know" Sedna's orbit is so eccentric?
- Why do hydrogen bonds occur only with Fluorine, Nitrogen and Oxygen atoms?
- Why are solar panels glossy? Isn't the goal to absorb light and not reflect it?
- Time Magazine article says Scientists just teleported an object into space for the first time!! How exactly does this work and what does it mean going forward??
- What are these types of coördinates and how do I use/read them?
- What are does gravity being discovered as a wave mean for the current model of particle physics?
- Is it always better to use a higher concentration of solvent for cleaning?
- Why was Deinonychus so pivotal to our current understanding of dinosaurs?
| Posted: 17 Jul 2019 04:00 AM PDT Four years after NASA's New Horizons flew by Pluto, and seven months after our flyby of 2104 MU69 in the Kuiper Belt, we have discovered more than ever before about the origins of the Solar System, but there is still so much more to explore! The team is meeting at the Johns Hopkins Applied Physics Lab, the home of the New Horizons mission operations center, to share the latest science info we've learned in our epic voyage through our cosmic neighborhood. We will also cover the historic New Year's flyby of 2104 MU69, the farthest object ever explored by spacecraft! Team members answering your questions include:
We'll sign on at 5pm EDT. Ask us anything! [link] [comments]  |
| Why don’t we use metal cubes instead of ice cubes? Posted: 16 Jul 2019 01:27 PM PDT Since metal can get a lot colder than ice can wouldn't it made more sense if we would use metal cubes? Also you could use metal cubes multiple times. [link] [comments]  |
| Why do you start trembling/shaking if you haven’t eaten in a while? Posted: 16 Jul 2019 10:53 AM PDT |
| When do people use Planck units? Posted: 16 Jul 2019 06:11 PM PDT I never really came across this topic. In high school, I would mostly still use The Law of Universal Gravitation, Colulomb's Law etc., so I never really knew about this at all, and what purpose do they serve (apparently it is to communicate with potential aliens under standardised equations?). My conceptual thinking isn't the brightest, so I also have trouble understanding how the Planck equations and derived units are derived from the Wikipedia page. [link] [comments]  |
| Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology Posted: 17 Jul 2019 08:14 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Economics, Political Science, Linguistics, Anthropology Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! [link] [comments]  |
| Why don't we see eclipses of external stars? Posted: 16 Jul 2019 03:18 PM PDT The question is pretty much the title. Why don't we see a constantly changing night sky with stars popping in and out of our view through let's say star bound planets crossing our path of vision? Shouldn't there be a significant amount of stellar eclipses happening all the time, visible to the naked eye? I'm looking forward to being educated and thanks in advance, all input is appreciated :) [link] [comments]  |
| Posted: 17 Jul 2019 12:25 AM PDT |
| Posted: 16 Jul 2019 11:23 AM PDT I feel like I've seen assertions to this effect here and there. I'm not sure why it would be true, though. I would think the body would either store excesses of both, or slough off excesses of both. But why would it do different things with the two different substances? I looked for an answer on Google, but couldn't find one. [link] [comments]  |
| Apollo: How did the Lunar Module measure its speed? Posted: 16 Jul 2019 02:12 PM PDT Hi, this is my first post on Reddit- I tried Googling this question to no avail, so it's convinced me to finally get round to making an account! I'm a 2nd year astrophysics undergrad so of course I've been lapping up all the Apollo 11 anniversary TV, but one thing has me stumped: There was a moment during each of the Apollo landings at which both the astronauts and mission control switched to moon-reference coordinates. How did the spacecrafts actually keep track of their position from this point onward (and therefore their speed, altitude etc.)? Did the on-board computer actually have some way of actually "seeing" their position relevant to landmarks or is it something more sophisticated than this? Thanks in advance! [link] [comments]  |
| Why don't clouds disperse via equilibrium? Posted: 16 Jul 2019 12:24 PM PDT |
| How fast do astrocytes migrate in a chemotaxis assay? Posted: 16 Jul 2019 11:23 AM PDT Im doing a chemotaxis assay and am having some trouble choosing the frame rate because I don't know how fast astrocytes migrate. [link] [comments]  |
| Did Celsius and Fahrenheit ever meet (or correspond)? Posted: 16 Jul 2019 08:05 AM PDT Celsius and Fahrenheit meet at -40, but did Anders Celsius and Daniel Gabriel Fahrenheit ever meet? I'm curious to learn if the two engaged in some form of debate around the merits of the two systems, in person or through correspondence. [link] [comments]  |
| How do we "know" Sedna's orbit is so eccentric? Posted: 16 Jul 2019 10:49 AM PDT So while looking up the Oort Cloud for reasons, I remembered Sedna. Specifically because the sources included Sedna being theoretically right at the edge or within the inner reaches of the Oort Cloud. Since Sedna's orbit is so long, and we have ways to estimate how long a "year" is, that got me thinking: How do we know it is so eccentric, since we couldn't have had much of a chance to observe Sedna. [link] [comments]  |
| Why do hydrogen bonds occur only with Fluorine, Nitrogen and Oxygen atoms? Posted: 16 Jul 2019 07:29 PM PDT |
| Why are solar panels glossy? Isn't the goal to absorb light and not reflect it? Posted: 16 Jul 2019 07:59 AM PDT |
| Posted: 16 Jul 2019 09:07 PM PDT So the link below has the whole story but how exactly does it work and where does this lead us?? Does this make it possible to teleport bigger objects? [link] [comments]  |
| What are these types of coördinates and how do I use/read them? Posted: 16 Jul 2019 10:57 AM PDT I have a list of coördinates, the legend says that these are longitude and latitude, but when i try to use them it seems that they're not in the convention of how longitude and latitude should look like. Below is an example of such a coördinate from the list: -> These don't follow that convention and it seems that they're useless in google maps. For example, when I look-up coördinates on google maps I get them in the following format (Decimal Degrees) Example: 50.836666, 4.334930 Is this some kind of different system, and if yes, is there a way to convert the above ones into the DD notation? PS: It would also help if someone can point out the scientific name for that first type of coördinates. [link] [comments]  |
| What are does gravity being discovered as a wave mean for the current model of particle physics? Posted: 16 Jul 2019 12:10 PM PDT Hello Reddit, Thanks PS - I also don't understand what gravity being a wave means. Is it similar to how light is a particle and a wave? And if so could their potentially be a constant speed of gravity like how there is a constant speed of light? [link] [comments]  |
| Is it always better to use a higher concentration of solvent for cleaning? Posted: 16 Jul 2019 07:47 AM PDT Hello r/askscience! My question is, is it always better to use a higher concentration of cleaning solution? I realize this is a broad question but let me provide an example and hopefully flesh out what I'm asking. Dish detergent. One school of thought I have encountered is to use as little water as possible, it's all about concentration. Try to get a "slurry" high in soap to cut through the grease. Another school of thought would be that you want enough cleaning solution dissolved in enough water. So to compare the two groups, they could use the same about of soap, but one with much more water. I was an amateur chemistry student, but I feel like you want there to be a lot of water as well as solvent so that there is a lot of water for your solvated grease/soap mixture to dissolve into without the concentration of the mixture becoming to high in the water. If there is too little water, I feel like you quickly run into a situation where there is a high concentration of grease on the pan, and a high concentration of grease/soap in the water, and now there is not much of a gradient, and the grease is not going to want to dissolve. Like, isn't there some equilibrium stuff going on here? Like, you wouldn't use pure soap, would you? Or maybe you would if it was actually cost effective... So it it always better to clean something using a higher concentration of your cleaner, or are there lower concentrations that are more optimal? Thank you. [link] [comments]  |
| Why was Deinonychus so pivotal to our current understanding of dinosaurs? Posted: 16 Jul 2019 10:22 AM PDT After all, Deinonychus was hardly the first "bird-like" dinosaur to be discovered and described. Many such dinosaurs were even given names alluding either to an active lifestyle or a relationship to birds (Velociraptor and Ornithomimus, for example.) So why did these views only become established fact after the discovery of Deinonychus? [link] [comments]  |
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