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AstroNavigation – A free course
- nearmuse 8y agoCool, I was thinking of learning this recently. I also wanted to find a book on amateur astronomy but still have no idea what exactly to look for.
- themodelplumber 8y agoMe too! I've also been looking for an astronomy app that's not super complex, and not like a projection of the sky, just a list: "What's in the sky tonight," ordered by most-commonly-wondered about. Like "1) If you look to the West you'll probably see Venus."
- Jtsummers 8y agoI’ve been happy with Sky Guide over the years. It’s not a list but it tells you what you’re looking at and you can set it to arbitrary times and locations. Like I can know what my girlfriend would see in Argentina tonight while sitting in my apartment in the US. It is a projection and not a list but it’s very handy and helps you identify objects better than a list would.
- mast 8y agoOne of my favourite books is Turn Left at Orion by Guy Consolmagno. It describes the different astronomical objects that you can expect to see and how to find them in the sky. I think it also does a good job of setting expectations because you just won't see Hubble class images from your backyard. The is also a companion website http://www.cambridge.org/features/turnleft/ http://www.cambridge.org/features/turnleft/
- abenedic 8y agoI can second this recommendation, if you are into backyard astronomy.
- gcheong 8y agoNightWatch by Terence Dickinson is often recommended.
- jcurbo 8y agoTurn Left at Orion is a popular suggestion (see sibling comment) but the other question is what do you want to do, what part of astronomy interests you? Amateur astronomy is a vast field and depending on what you're interested in, you'll go in different directions. Do you want to look at the Moon? Planets? Galaxies? And so on. Of course, you probably need a starting point which a good book can provide. See if you have a local astronomy club you can go visit, they will usually have events where you can use telescopes and talk to experienced folks. You can also poke around on Cloudy Nights (www.cloudynights.com), by far the largest amateur astronomy forum online.
- dhimes 8y agoI've used Redshift since I taught astronomy. The mobile app is very good.
- syntaxing 8y agoI always wanted to learn something like this! Embarrassingly... I never knew what it was called until today so I never found any books or videos on it. Learning what it is called and about an free course online course is awesome!
- gcheong 8y agoIt's also referred to as celestial navigation.
- dhimes 8y agoYour local chapter of the United States Power Squadrons (now re-branding to America's Boating Club) teaches this.
- syntaxing 8y agoIs it a one time fee or is there a club I have to join first?
- dhimes 8y agoGood question. It used to require a membership (I think it's like $70/year); then there is a fee for the course on top. I believe now they have opened the courses up to the public. There are two courses, actually. The first one focuses on sun sights- I've had that one. The second uses other stars. It's really for marine folks- so it includes a lot of navigation stuff. https://americasboatingclub.org/education-matters/in-person-boating-education/ https://americasboatingclub.org/education-matters/in-person-...
- syntaxing 8y agoAwesome, thanks!!
- nagarc 8y agolink not working?
- Fjolsvith 8y agoBoy scouts orienteering merit badge stuff.
- Fjolsvith 8y agoFor you downvoters, I was in the Boy Scouts and earned the Orienteering merit badge.
- Jtsummers 8y agoUnless it’s changed the orienteering badge was about topo maps and compasses 20 years ago. The requirements (pamphlet isn’t free, but requirements are online) seem to indicate that’s still true. This course covers something different and more complex than what the scouts taught us.
- saudioger 8y agoNeat.
- Casseres 8y agoEagle Scout here. So was I, but your experience seems atypical. You probably just had a Merit Badge counselor that went above and beyond. That's awesome! Anyone who wants to give back and help the shape the next generation, you can be a Merit Badge counselor. Just talk to your local council. There's over a 100 Merit Badges, and more than half of them are STEM-related. If you have a career or hobby that's related to one of them, you can share your knowledge, skills, and advice to others. https://beascout.scouting.org/Volunteer.aspx https://beascout.scouting.org/Volunteer.aspx
- markbnj 8y agoI was in the Boy Scouts and did orienteering, but I don't remember using a sextant, chronometer, and sight reduction tables :).
- aleksei 8y agoFor anyone interested in natural navigation in general, you might check out The Lost Art Of Finding Our Way: https://www.goodreads.com/book/show/16241535-the-lost-art-of-finding-our-way https://www.goodreads.com/book/show/16241535-the-lost-art-of...
- secfirstmd 8y agoI also highly recommend "Finding your way without map or compass" https://www.amazon.com/Finding-Your-Way-Without-Compass/dp/048640613X https://www.amazon.com/Finding-Your-Way-Without-Compass/dp/0...
- nyokodo 8y agoI failed this course 13 times so I've remained a Second Technician in the Space Corps.
- thelibrarian 8y agoAt least you have your Bronze Swimming Certificate.
- dreamcompiler 8y agoAnybody know where to buy a good sextant? (I hope the course discusses this; I haven't had time to read it yet.) I started trying to learn this stuff a few months ago and it seems that most available sextants fall into two categories: Cheap plastic ones with poor thermal characteristics that make them inaccurate, and expensive brass ones that are more thermally stable but designed for display and not calibrated for serious navigation. I'd like to buy one in between: A quality navigational instrument that doesn't have to be "pretty".
- Something1234 8y agoHarbor freight used to sell a brass one. Haven't checked in a while, but it might be something nice.
- Luc 8y agohttps://www.harborfreight.com/brass-sextant-66096.html https://www.harborfreight.com/brass-sextant-66096.html That is a typical 'decorative object', not a sextant fit for purpose. They've been flooding auction sites in hundreds of variations, often 'antiqued' and made to look superficially like real 150 year old sextants. Imagine staring into the sun through that telescope using only that coloured green glass as a filter. Goodbye retina!
- gcheong 8y agoThis site seems to have a good selection: https://www.celestaire.com/ https://www.celestaire.com/ . A person commenting in the San Francisco Amateur Astronomers facebook page where I posted this course mentioned they have an Astra III-B
- asclepi 8y agoAny good nautical store should have them. Obviously, you'll find those only at the coasts or near rivers. I can recommend American Nautical Services[0]. [0] https://www.amnautical.com https://www.amnautical.com
- Luc 8y agoI would suggest subscribing to navlist at fer3.com, and reading through the many old threads there about this subject to get a general idea. In my experience the good and the bad sextants are all mixed on the auction sites. You can always post a picture there before you buy... Personally I'd never buy a new one, since a second hand one is just as good (if you have a bit of knowledge and avoid broken ones). A sextant doesn't need calibration beyond what's done at the factory and what you can do yourself. On top of that most have been very lightly used. If you're interested in the instrument itself (rather than simply how to use it as a tool), 'The Nautical Sextant' by Bill Morris is a superb book: https://www.amazon.com/Nautical-Sextant-W-J-Morris/dp/0939837897 https://www.amazon.com/Nautical-Sextant-W-J-Morris/dp/093983... .
- golem14 8y agoI found this course somewhat lacking in intuition building. It's also sad that we're still using trig tables (that's essentially what the nautical Alamanac is. It also has to be updated every year). I thought the aeronautical paper flight computer was complex ... Also, I find it hard to believe that a set of 6 books is more disaster proof (and quicker to use) than a hardened calculator for when the shit hits the fan ... FWIW, here is a nice free resource for printing your own almanac: http://sv-inua.net/the-nautical-almanac http://sv-inua.net/the-nautical-almanac
- tawm 8y agoWhy is looking things up in a table sad? For the purpose of astro nav: NP303 is calculated for an epoch of 5 years (and it's only 3 books). Until its end of life, it has to be "updated" in the sense that corrections need to be applied as they are released. I don't think the point of the books has ever been disaster proofing. For the most part, books were good enough for the job before computers and still are. They're cheap, come from trusted sources (and it's easy to verify that they're legitimate), and they're easy to correct should they have errata. Windows PCs and excel spreadsheets are used in navigation all the time. Nobody's forcing navigators to use books. If they do, though, they probably have a good reason for it.
- cge 8y agoIf we are to go much further on the technological side of this, I have to wonder: rather than just using a calculator rather than a table, what could be done with just a phone that could combine software with a clock, an accelerometer, and a camera?
- sizzzzlerz 8y agoI watched the first couple videos but stopped when they started a practical example (3rd video, I think). Turns out you need some basic tools I don't have (dividers, parallel rulers) and charting paper. They don't mention this upfront. I need to perform the steps they demonstrate in order to have it sink in so I stopped watching. The tutorial is interesting enough that I'll see if I can get the necessary things and pick it up again.