AskScience AMA Series: We're experts working on the James Webb Space Telescope, the most powerful observatory ever built. It's ready to launch. Ask us anything! |
- AskScience AMA Series: We're experts working on the James Webb Space Telescope, the most powerful observatory ever built. It's ready to launch. Ask us anything!
- What is a curled up dimension?
- Is the original version of Covid-19 extinct now?
- Why do we prefer muscles for vaccine injection?
- In a developing embryo or fetus, how do cells know what type to turn into and where to go in the body?
- if you heat up a goose before winter ends, would it think that summer is soon and fly north?
- Does adding an acid to a solution already containing a stronger acid lower the pH?
- Do phytoplankton need light-dark cycles like plants?
- Living and traveling all around the US, I've heard lots of stories about invasive species of plants, fish, insects, etc. wreaking havoc on the local enviornment. Are the examples of American flora/fauna invading other countries?
- How do they make the Nd2Fe14B for neodymium magnets?
- Do mild infections yield mild immune 'memory'?
- Do antibodies regenerate after you donate blood?
- My Non electric metal fence post under transmission line felt like it was charged. What causes this?
- If you're infected with covid when you get a booster, can the vaccine created spike protein bind with the real virus?
- Why are salt bridges so important in proteins? (esp the COVID omicron spike protein)? Do they induce a new "degree of freedom" in the ability of the protein to be precisely controlled by the environment?
- When can we expect to have a clearer picture about the properties of the omicron variant (transmissibility, severity)?
- For electromagnetic waves (light, microwaves, etc.) why does it depend on the wavelength if they can pass through a material without interacting?
- Do influenza and COVID-19 viruses compete against one another?
- Aside from canine crossbreeds like the wolfdog, are male hybrids ever fertile?
- Why are some diseases like COVID and chicken pox milder in children?
| Posted: 16 Dec 2021 04:00 AM PST The James Webb Space Telescope (aka Webb) is the most complex, powerful and largest space telescope ever built, designed to fold up in its rocket before unfolding in space. After its scheduled Dec. 24, 2021, liftoff from Europe's Spaceport in French Guiana (located in South America), Webb will embark on a 29-day journey to an orbit one million miles from Earth. For two weeks, it will systematically deploy its sensitive instruments, heat shield, and iconic primary mirror. Hundreds of moving parts have to work perfectly - there are no second chances. Once the space telescope is ready for operations six months after launch, it will unfold the universe like we've never seen it before. With its infrared vision, JWST will be able to study the first stars, early galaxies, and even the atmospheres of planets outside of our own solar system. Thousands of people around the world have dedicated their careers to this endeavor, and some of us are here to answer your questions. We are:
We'll be on at 1 p.m. ET (18 UT), ask us anything! Username: /u/NASA [link] [comments] |
| What is a curled up dimension? Posted: 16 Dec 2021 10:36 AM PST I know this is a stupid question but it's been bugging me. One explanation of the extra dimensions needed for string theory is that they are "curled up." I can't make any sense of that. In my mind no matter how small or curled up a dimension is it's still length or height, just .00000whatever of the same dimension. Thanks in advance. [link] [comments] |
| Is the original version of Covid-19 extinct now? Posted: 15 Dec 2021 02:18 PM PST |
| Why do we prefer muscles for vaccine injection? Posted: 15 Dec 2021 02:49 PM PST |
| Posted: 15 Dec 2021 06:36 PM PST How do the first bone, skin, organ, blood etc cells come about? How are the first of each type created?How does a cell know what type to become? How do they know where in the body to go? Are there ever any errors, and if so what happens then? Thanks! [link] [comments] |
| if you heat up a goose before winter ends, would it think that summer is soon and fly north? Posted: 15 Dec 2021 05:51 PM PST |
| Does adding an acid to a solution already containing a stronger acid lower the pH? Posted: 16 Dec 2021 05:52 AM PST As the title says I'm wondering if proton donation is the same regardless of other chemicals. Our specific example is with regards to carbonic acid and citrus acid (does carbonating orange juice make it more acidic) Was having the discussion and we thought of 3 outcomes and couldn't determine which was right. 1) H2CO3 when added to the orange juice would donate it's hydrogens and cause pH to be lower since we have more free hydrogen in solution. 2) pH would increase to a point between the relative acidity of carbonic acid and citric acid through the magic of chemical interactions. 3) no change in pH since the H2CO3 would be already below it's natural dissociation amount and therefore not release any of its protons into solution. Which one of these is the case? Is there a 4th situation for what actually happens? We need to know the effects of using a sodastream with orange juice. Thanks [link] [comments] |
| Do phytoplankton need light-dark cycles like plants? Posted: 16 Dec 2021 01:10 AM PST I know all photosynthetic protists (old cathegory, I know) and bacteria must have a respiration process at some point, as they need to somehow survive during the night. But is their respiration regulated by day-night cycles like it happens with plants, or does it go on during the day along with photosynthesis with the same ""intensity"" as it would during the night? Could it be possible then to kill these organisms by exposing them to light 24/7? I've tried looking it up online, but what I found is that there's wildly contradicting information about how much lack of darkness actually harms/doesn't harm plants, so now I'm even more confused lol. [link] [comments] |
| Posted: 16 Dec 2021 04:56 AM PST |
| How do they make the Nd2Fe14B for neodymium magnets? Posted: 16 Dec 2021 03:41 AM PST Do they just melt the Neodymium, Iron and boron all together to form an alloy? If so, since iron has a higher melting point than neodymium and boron has a higher point than iron, wouldn't the metals just vaporise? I'm not expert into these and that's why I'm asking lol. [link] [comments] |
| Do mild infections yield mild immune 'memory'? Posted: 16 Dec 2021 05:34 AM PST TLDR: Is the probability of re-infection from a virus proportional to the severity of the initial infection? I have heard a lot speculate that viruses evolve to be less severe, but hadn't seen any mechanism posited for that to happen. Thinking about Omicron and the number of people who have already been infected with Covid, I thought that the bigger 'advantage' could be reinfection rather than pure transmissibility (not sure the correct term). Comparing two variants, one severe and highly transmissible but can't re-infect versus one mild, mildly transmissible (effective R slightly over 1), but CAN re-infect. Over a long evolutionary history, the second could be the one that survived. I'm naive (to the science, not immunologically), so a pointer to introductory or moderately specific texts would be appreciated. [link] [comments] |
| Do antibodies regenerate after you donate blood? Posted: 15 Dec 2021 08:44 PM PST |
| My Non electric metal fence post under transmission line felt like it was charged. What causes this? Posted: 15 Dec 2021 02:29 PM PST I was putting a fence post on underneath some large transmission lines and I could feel a weird sensation like it was vibrating and it was kind of like a minor shock although more uncomfortable than painful. What causes this? [link] [comments] |
| Posted: 16 Dec 2021 08:22 AM PST Will the spike my body makes be usable by the virus or is it different enough that it doesn't work? Could that have any impact on your body's ability to fight the virus? (Clarification: I don't think I'm infected. I'm just curious) [link] [comments] |
| Posted: 16 Dec 2021 07:33 AM PST |
| Posted: 16 Dec 2021 05:51 AM PST |
| Posted: 15 Dec 2021 01:27 PM PST Thinking about the grate on the front of a microwave oven, I am told that the microwaves do not pass through because the holes in the grate are smaller than the wavelength of a microwave. However... if the grate is in the x-z plane, and the microwave is traveling on the y axis (with the electric component in the z and magnetic in the x) then why does how much of the wave passes through a point on the y-axis per cycle (wavelength) determine how it can pass through the grate? [link] [comments] |
| Do influenza and COVID-19 viruses compete against one another? Posted: 16 Dec 2021 05:32 AM PST Basically title. I've seen numerous reports that influenza has been eclipsed by COVID-19 through the pandemic. In my country, something very odd is happening right now, as COVID cases have been low (compared to their peak earlier this year) but influenza (mostly A/H3N2) is hitting everywhere. Does having a active case of one virus makes it harder to be infected by the other? [link] [comments] |
| Aside from canine crossbreeds like the wolfdog, are male hybrids ever fertile? Posted: 16 Dec 2021 04:57 AM PST I know that most hybrid animals of either gender are sterile, but there are rare exceptions where one does turn out fertile. But in almost every case, such as with mules and flowerhorn cichlids, it's only the females that are able to reproduce. That begs the question: are there crossings where only the males can reproduce? I am excluding the canines because from what I understand, DNA shows them to be related closely enough that, at least in the case of the wolf and the dog, the dog is actually a subspecies, and not a species in it's own right. Thanks! [link] [comments] |
| Why are some diseases like COVID and chicken pox milder in children? Posted: 15 Dec 2021 01:03 PM PST |
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