In this NASA image, why does the Earth appear behind the astronaut, as well as reflected in the visor in front of her? |
- In this NASA image, why does the Earth appear behind the astronaut, as well as reflected in the visor in front of her?
- AskScience AMA Series: We are researchers studying breast cancer at the National Institutes of Health (NIH). In honor of National Breast Cancer Awareness Month, ask us anything!
- How do random number generators work? Are they really random?
- How do we know that far away galaxies aren't made from antimatter?
- What mammal do we share the least dna similarities with?
- Why can't you measure the earth's potential with a multimeter?
- How do Implantable Cardioverter Defibrillators know how much of a shock to give?
- Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology
- Why do carbon dioxide levels cause climate change when it was all originally drawn from the environment in the first place?
- If a really big but extremely slow meteor was heading to earth, would it speed up because of the gravity of the earth?
- Can we create ball lightning artificially?
- How much radiation is still on Marie Curies notebooks?
- Is soap, water, and grease considered a physical reaction?
- What happens at the middle of the earth's core?
- Is there an el nino in the Atlantic too?
- What is the most powerful explosion in the universe: long gamma ray bursts or black hole mergers?
- Why do wave pulses travel instead of spread?
- How does the rate of respiration in warm blooded animals differ to those of cold blooded animals?
- How do children learn conceptual words?
- Are there lots of planets that have the exact same relative size sun and moon or is it just a massive coincidence that Earth has this?
- What isotope of carbon do burning fossil fuels put into the lower atmosphere?
- If light can't escape the gravity of a black hole, doesn't that mean we could theoretically go faster than the speed of light if we sling-shotted a shuttle around one?
| Posted: 08 Oct 2019 10:29 PM PDT The image in questionThis was taken a few days ago while they were replacing the ISS' Solar Array Batteries. A prominent Flat Earther shared the picture, citing the fact that the Earth appears to be both in front and behind the astronaut as proof that this is all some big NASA hoax and conspiracy to hide the true shape of the Earth. Of course that's a load of rubbish, but I'm still curious as to why the reflection appears this way! [link] [comments]  |
| Posted: 09 Oct 2019 04:00 AM PDT During National Breast Cancer Awareness Month each October, current and former patients, advocates, and scientists work together to educate the public about a disease that touches the lives of millions of Americans every year. In 2019 alone, researchers expect more than 300,000 American women to be diagnosed with breast cancer, along with more than 2,600 men. Roughly one out of every eight American women will develop invasive breast cancer at some point in her lifetime, making it the second most commonly diagnosed cancer in American women. In recognition of National Breast Cancer Awareness Month, the NIH Intramural Research Program (IRP) and National Cancer Institute (NCI) have partnered to bring you an "Ask Me Anything" with two prominent researchers in the NCI's Women's Malignancies Branch: Stanley Lipkowitz, M.D., Ph.D., and Alexandra Zimmer, M.D. Dr. Lipkowitz studies cellular and molecular pathways that regulate the growth and destruction of breast and ovarian cancer cells, while Dr. Zimmer, the Branch's Clinical Director, develops translational clinical trials to study treatments for breast cancer that has spread to other parts of the body, particularly the brain. She also investigates ways of preventing breast cancer from leaving the breast in the first place, a process known as metastasis. Dr. Zimmer and Dr. Lipkowitz will be online from 1:00 pm to 3:00 pm ET (17-19 UT) to answer your questions. Ask them anything! For more information on the NCI's Women's Malignancies Branch, please visit https://ccr.cancer.gov/womens-malignancies-branch. To learn more about cancer research across the entire NIH IRP, go to https://irp.nih.gov/our-research/scientific-focus-areas/cancer-biology. As a reminder, we cannot answer questions about your medical treatment publicly. Please talk about these questions with your treating physician. [link] [comments]  |
| How do random number generators work? Are they really random? Posted: 09 Oct 2019 04:44 AM PDT |
| How do we know that far away galaxies aren't made from antimatter? Posted: 09 Oct 2019 07:23 AM PDT Scientists say that at the time of the big bang, in theory, equal amount of matter and antimatter should've been created, but now we have the universe of only matter. But how do we know that exactly? If antimatter has the same properties and behaviors similarly, how do we know that some Galaxy far away isn't made out of antimatter? [link] [comments]  |
| What mammal do we share the least dna similarities with? Posted: 08 Oct 2019 06:10 PM PDT |
| Why can't you measure the earth's potential with a multimeter? Posted: 08 Oct 2019 10:52 PM PDT Hi. I've read in some places that the Earth's atmosphere has an electric potential of about 100V/m at sea level. That confuses me for many reasons. Wouldn't anyone standing up be immediately electrocuted? Maybe the air just has a really big output impedance? Why can't you measure that potential with a multimeter? Output impedance shoudn't matter here. [link] [comments]  |
| How do Implantable Cardioverter Defibrillators know how much of a shock to give? Posted: 09 Oct 2019 12:49 AM PDT I watched a video where one of the makers of the device was saying that it can deliver a shock of 30-40 J although most people need about 10 J and I was just wondering how it knows whether or not someone will need a larger shock or not. Thank you for any help. [link] [comments]  |
| Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology Posted: 09 Oct 2019 08:08 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]  |
| Posted: 09 Oct 2019 01:27 AM PDT |
| Posted: 08 Oct 2019 08:01 PM PDT |
| Can we create ball lightning artificially? Posted: 08 Oct 2019 10:52 PM PDT |
| How much radiation is still on Marie Curies notebooks? Posted: 08 Oct 2019 03:56 PM PDT I just read that Marie Curies notebooks will still be radioactive for another thousand years at least because of the masses of radium and polonium that she and her husband handled. The books are kept in a box lined with lead in Paris - but what I could not find was the level of radiation in a unit like Sievert or Becquerel. Does anybody on here know this by chance? [link] [comments]  |
| Is soap, water, and grease considered a physical reaction? Posted: 08 Oct 2019 08:25 PM PDT I was washing my hands and remembered learning how the combination of water and soap allows the dissolving of grease or oil. I just don't remember what kind of reaction this is or if it's something other than a reaction. Does anyone know how this combination does it's magic? [link] [comments]  |
| What happens at the middle of the earth's core? Posted: 08 Oct 2019 09:29 PM PDT So I've always wanted to know... If temperature and all of that were out of the way, and we built a tube that goes straight through the middle of the planets core, would a person in the middle of the tube, at the core, float suspended in mid-air or would something else happen? [link] [comments]  |
| Is there an el nino in the Atlantic too? Posted: 08 Oct 2019 09:08 PM PDT Hello, we've all heard of El Nino and La Nina, but I was just wondering if there is a similar cycle/oscillation as ENSO in the Atlantic Ocean? If not, why is that? Thanks [link] [comments]  |
| What is the most powerful explosion in the universe: long gamma ray bursts or black hole mergers? Posted: 08 Oct 2019 10:02 PM PDT What is the most powerful explosion a long gamma ray burst or a black hole merger. Some sources say gamma ray burst some say black hole merger. I want to know which one is more powerful? [link] [comments]  |
| Why do wave pulses travel instead of spread? Posted: 08 Oct 2019 07:48 PM PDT If we have a long, straight string and then create an initial disturbance that quickly ceases, the pulse travels along the string - that is, the area that was initially disturbed returns to equilibrium. How can this be if the constituent particles move in SHM, which should imply that everywhere the wave pulse has been continues to oscillate? Follow up: how can individual pieces of the string do SHM when the transverse component of tension is 0 at the piece's maximum height, instead of the maximum force predicted by SHM? [link] [comments]  |
| How does the rate of respiration in warm blooded animals differ to those of cold blooded animals? Posted: 08 Oct 2019 12:02 PM PDT |
| How do children learn conceptual words? Posted: 08 Oct 2019 06:42 PM PDT |
| Posted: 08 Oct 2019 12:42 PM PDT It just seems highly improbable that we have almost perfect eclipses [link] [comments]  |
| What isotope of carbon do burning fossil fuels put into the lower atmosphere? Posted: 08 Oct 2019 06:33 PM PDT From Wikipedia: "Therefore, the carbon from fossil fuels that is returned to the atmosphere through combustion is depleted in both 13C and 14C compared to atmospheric carbon dioxide." If it's depleted of 13 and 14 then what isotope of carbon are fossil fuels putting into our air? https://en.m.wikipedia.org/wiki/Suess_effect Thanks! [link] [comments]  |
| Posted: 08 Oct 2019 09:53 PM PDT |
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