What type of telescope is used by most astronomers?
This sounds like a homework question... In any case - I think you have everything you need in the previous answers - so let's put it together. Professional astronomers use reflectors! this is because (a) the do not suffer from chromatic aberration (the change in focal length with color) that makes refractors less useful; (b) A lense will sag under gravity and distort, the telescope has to track stars, so the distortion changes over time. This makes is pretty much impossible to build very large lenses. Reflectors can be supported from the underside, so this problem doesn;t arise. (big telescopes are important for seeing faint objects). This is now an even bigger issue, because mirrors are designed to be able to be manipulated to compensate for seeing issues. (c) Reflectors absorb less of the light incident on them and thus are better when looking at faint objects. This stuff is all in the intro college astro textbooks (for non-science majors)
Why do astronomers use reflecting telescopes rather than refracting telescopes?
Reflecting telescopes consist of a set of curved mirrors used to focus light. With a concave mirror in the back it consentrates the light making the image brighter. Refracting telescopes is an optical telescope the refracts light at each end using lenses. So why do astronomers prefer refracting telescopes other than reflecting? All help is appreciated!
What can u see with 10x50 binocular in astronomy, or is a 80/400 scope better for astronomy?
i saw the moon with a friends 80/400 scope and was absolutely mesmerized. now i'm thinking of buying one for myself. i am on a low budget, want to use it to view the moon, planets and for terrestrial viewing. i want to go in for a refractor travelling type go scope. but when i researched over the internet, mostly everyone suggests to buy a 10x50 binocular. now as per my layman knowledge this binocular would not only have a magnification of just 10x but also the light gathering would be through two 50mm dia lens (i hope it's called a lens), whereas the 80/400 scope has a minimum useful magnification of 16x (with 25mm eyepiece) and 44x (with 9mm eyepiece) and would gather light with 400mm dia lens. I am highly confused. am from mumbai, india and the price for both of the above is the same, binocular being nikon made. for comparison could anybody also tell me what would be the difference in the detail of the moon as seen from both of the above
Astronomy Lab help??????????????????????
Those astronomy instructors always seem to want the impossible. It sounds like you got the basic assignment accomplished and the intent of the lesson. Now you are waiting on the weather. My suggestion is don't cheat and take the data your asked to get from some book or computer planetarium program. If you do and the instructor has any sense of what the weather has been, the question will be how did you get the data? Take the instrument you constructed and your first set of data points to the instructor and ask for an extension due to weather. If the instructor is reasonable they will realize that nature is not to be held to an artificial schedule.
What type of question can be asked if I am mentioning listening to music as hobby?
What type of music you like the most and the least. Why?Who is your favorite singer? Both male and female?Do you like music or songs?If you like music, who is your favorite musician?The name of the first and the latest albums / songs by your favorite singer / musician / lyricist?What is the life lesson you have learned from your favorite?Have you ever heared musician / singer / lyricist X where X may be interviewers favorite.Which is your favorite song?Which song is your recent favorite?Do you listen songs while commuting?Tell me the last song you listened before coming here? Tell me the name of artists related to it or may be just lyrics.How do you think your hobby can be useful to your daily office work?// Have listening songs as a hobby and had been asked these questions at various interviews. // If you are not a big fan of classical music, start saying hobby as listening songs rather music. I had been a victim. :)
Are there any other optical instruments except telescopes needed for learning astronomy?
Sure. Cameras are an important instrument in the field of astronomy. Often paired with a telescope, it sure beats the old fashioned method of trying to sketch out what you are seeing on paper and studying your own sketches afterward.A spectrometer is also a pretty useful instrument, used to study the light emissions of stars to determine their chemical composition and so on. Like cameras, these are typically coupled with a telescope.It's really hard to do much in the way of meaningful astronomy without the aid of a telescope; besides the sun and the moon, everything else is just too distant, its apparent size too small, its magnitude too weak, to observe in anything other than a casual fashion.
What major should I get to work with Radio Astronomy?
There are two primary paths into radio astronomy. Which is best for you depends on what your primary interest is. If you are interested in the types of science that can be done with radio observatories, you’d take one route. If you are interested in the technologies that are used, then you might take the other.The “science” based route (in the USA, at least) is:Attend a university and major in physics or astronomy. Many schools don’t offer a separate astronomy degree program. Regardless of what the school allows, treat the degree as a complete physics degree with a few astronomy courses.As soon as possible, begin working in the research group of a faculty member. Do this even if you don’t get paid to do it. It wouldn’t hurt if it was related to astronomy.Take the GRE with the Physics subject test. Apply to PhD programs that have a faculty member who works on things related to your research interests. Get accepted to at least one. Pick the best one.Graduate with your Bachelor of Science degree in Physics/Astronomy.Do your PhD research. Write a thesis.Congratulations. Now get a job.The “technology” based route is:Attend a university that has both electrical engineering and astronomy departments and major in electrical engineering/computer science or whatever the equivalent at the university is.As soon as possible, begin working in the research group of a faculty member who works on astronomical instrumentation for radio telescopes.Graduate and get a job designing and implementing radio telescope instrumentation. Or….Apply to PhD programs in EE or Astrophysics. And follow the 3,5,6 path above.Of course there are modifications to this. There can be cross department PhDs or you might have electrical engineering professors serving on an astronomy department committee. Also realize that if you go the PhD route, you are not expected to “stay inside the lines” either before or after getting your degree (although many will encourage it). I worked in X-ray optics as an undergraduate, built UV instruments for studies of interstellar matter as my thesis work, then transitioned to radio, optical and UV studies of interstellar matter, UV instrumentation for space physics, SETI and volunteer computing over the course of my career.
How can I be an astrophysicist in India? I'm now in 12th standard.?
I wants to give the answer in two parts.1) you have to go through the most of the biography of scientists. there are few things which you see are most common among them. you find that either they are in born talented or they become by working hard.first kind of scientist are brilliant observer and most of the untouched part of sciences are explored by them.and other kinds are so learned and that learning makes them hungry to explore.its upon you who you are.if you are of first kind than all the answers are really bullshit for you . .!!!if you are of second kind the next part is for you.2) There are lots of ways to be an astrophysicist in india you shoul apply for ISRO and the eligibility criteria for isro is as followyou have to fulfill the eligibility criteria for joining ISRO !!!!!EDUCATIONAL QUALIFICATION!!!!!you need to pass your 12th and graduation from a recognized board and University in India or abroad, respectivelyyou need to have a minimum of 70% in 10th and 12th!!!!!!Age Limit!!!!!Lower age limit for ISRO: 21 years you should have two of your main subjects asPHYSICSMATHSafter your 12th you can do some courses like http://B.Sc B.Techyou can opt for the following colleges IIST KERALAIIT BANGALOREIIT DELHIIIT KHARAGPURIIT KANPURBITS PILANISCIENCE COLLEGE, KOLKATAGetting a Chance in ISRO is very tough!!! The competition is huge and only the jewels of the country get the chance to get thereafter you get the Chance you can work on various subjects and projects related to space and space research. the recent achievements of ISRO has highlighted it a lot and thus many and many students are getting interested in it and are going a chance in ISRO........ but as usual only the best can make through it You need to take preparation from the very beginning and you must give very dedicated hard labour for it you may take some professional experienced help if you need . it may come very handy in cracking the exam you need to have full concentration and determination as it will take quite some time to get your talent level upto that bench mark required for http://ISRO.so stay calm....work hard, be regular in your studies and you will be bound to get results Read more:
"human eye has a logarithmic rather than linear response to light" ? Explain to a layman?
In simple terms: A linear response would mean that a light that's twice as bright would look twice as bright. (But that's not the case.) And a light that's 10 times as bright--measured with a scientific instrument to determine brightness--would look to our eyes as being 10 times as bright. However, our eyes and our brains adjust. So, as it's saying there, if you look in the sky the brightest stars look about 6 times as bright as the weakest stars--the order of magnitude. However, in reality, those bright stars are 100 times as bright. Our body--our minds and our sensory organs--do that to protect ourselves and to allow us to see/hear/sense a wider range of objects. With light, for instance, if we looked at something that appeared to be dim and then looked at something that appeared to be 100 times brighter, it'd probably blind us. Or if our eyes saw that brightest object as simply "bright" and the eye had a linear response, we'd never be able to see those faint lights. So the eye compresses the range. We can still tell bright from dim--and that's what's really important. Hope that helps.