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Index »
Radio Paradise/General »
General Discussion »
Astronomy!
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Page: Previous 1, 2, 3 ... 9, 10, 11, 12 Next |
MrsHobieJoe
Location: somewhere in Europe Gender:
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Posted:
Dec 4, 2009 - 5:28am |
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Thanks for your thoughts everyone. I'll research these over the weekend.
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Leslie
Location: Antioch, CA Gender:
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Posted:
Dec 3, 2009 - 8:58pm |
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jadewahoo
Location: Puerto Viejo, Costa Rica Gender:
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Posted:
Dec 3, 2009 - 8:53pm |
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Leslie wrote: You're a vowel!
I'll take a consonant for 50.
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Red_Dragon
Location: Dumbf*ckistan
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Posted:
Dec 3, 2009 - 8:50pm |
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Leslie wrote: You're a bowel!
fixed
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Leslie
Location: Antioch, CA Gender:
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Posted:
Dec 3, 2009 - 8:47pm |
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ScottFromWyoming wrote: It'll make you look like a planet!
You're a towel!
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ScottFromWyoming
Location: Powell Gender:
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Posted:
Dec 3, 2009 - 8:39pm |
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Leslie wrote:Yeah, but will it make me look slimmer? It'll make you look like a planet!
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BlueHeronDruid
Location: Заебани сме луѓе
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Posted:
Dec 3, 2009 - 8:31pm |
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Leslie wrote:Yeah, but will it make me look slimmer? It will make you look positively heavenly, dear.
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Leslie
Location: Antioch, CA Gender:
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Posted:
Dec 3, 2009 - 8:30pm |
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BlueHeronDruid wrote:If I had known better, we'd have started out with something like the Galileoscope we have now. Light, simple to build and use - very inexpensive. A no brainer to run out the door and set up in a hurry. Decent to use as a spotting scope, too, if you don't mind the inverted image.
Yeah, but will it make me look slimmer?
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BlueHeronDruid
Location: Заебани сме луѓе
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Posted:
Dec 3, 2009 - 8:18pm |
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Lazy8 wrote: Good enough for the likes of me.
If you want to find new comets or track the Mars rover the optics aren't good enough. If you just want to check out craters on the moon or admire Jupiter's fall colors it's fine. Birdwatching or checking your zero...it's a bit of overkill.
It isn't as heavy and sturdy as one of the big reflectors so it won't be as stable. You have to peer thru the eyepiece in a straight line. Focusing is awkward due to stick-slip (no knobs, just slide the tubes like a pirate). But it's dirt cheap and if you get a taste for stargazing you won't be that far behind buying a "real" telescope. If you don't...well, you didn't spend much. It's a good first step if you're on a (very) tight budget or need to fit it into a knapsack—all folded up it's 22.25" (565mm) long and weighs...maybe half a kilo. The tripod will be bigger in every dimension.
I concur. We got a Celestron reflector some years ago when living in Illinois. It was unwieldy and difficult to use (considering our best skies were in winter, and it took a long time for the scope to acclimate). Sat out on our deck in NJ (to Buzz's horror - we lived in the country and he was of the "leave it out and it'll walk away" mindset), but still not used much. Brother-in-law is enjoying it now. If I had known better, we'd have started out with something like the Galileoscope we have now. Light, simple to build and use - very inexpensive. A no brainer to run out the door and set up in a hurry. Decent to use as a spotting scope, too, if you don't mind the inverted image.
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Lazy8
Location: The Gallatin Valley of Montana Gender:
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Posted:
Dec 3, 2009 - 7:39pm |
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plaice3 wrote:This is pretty interesting. I'll have to research more later, but it works well enough for casual observation?
Good enough for the likes of me. If you want to find new comets or track the Mars rover the optics aren't good enough. If you just want to check out craters on the moon or admire Jupiter's fall colors it's fine. Birdwatching or checking your zero...it's a bit of overkill. It isn't as heavy and sturdy as one of the big reflectors so it won't be as stable. You have to peer thru the eyepiece in a straight line. Focusing is awkward due to stick-slip (no knobs, just slide the tubes like a pirate). But it's dirt cheap and if you get a taste for stargazing you won't be that far behind buying a "real" telescope. If you don't...well, you didn't spend much. It's a good first step if you're on a (very) tight budget or need to fit it into a knapsack—all folded up it's 22.25" (565mm) long and weighs...maybe half a kilo. The tripod will be bigger in every dimension.
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plaice3
Gender:
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Posted:
Dec 3, 2009 - 7:12pm |
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This is pretty interesting. I'll have to research more later, but it works well enough for casual observation?
Lazy8 wrote:One of these. Good cause, and it's not a bad 'scope either. You build it from a kit. A regular photo tripod works fine with it.
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BasmntMadman
Location: Off-White Gardens
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Posted:
Dec 3, 2009 - 4:49pm |
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oldslabsides wrote:Try a Dobsonian. They're available in a a wide range of sizes and prices and are pretty bullet proof. I'm sure there are plans, kits and parts a-plenty via google as well. I'm with oldslabsides. Orion sells some pretty decent Dobsonians at decent prices; I'm not sure about shipping to the UK, though. The Dobsonian mount is quite solid, and easy to use...unless you're observing right at the zenith. It's altazimuth, meaning that you can't track by rotating on one axis, but so what? IMO, it's mostly a concern at really high powers, over 100x. Durability? The only way a child could really wreck it is if he created a truly serious gouge on one of the mirrors, most likely by dropping something on one. Even then, bear in mind that the shadow of the holder for the secondary, diagonal mirror on the large primary is the equivalent of a gouge. In fact, it's recommended that you "deface" the center of the primary mirror with a black dot and white paper reinforcement ring so you can line up the optics better. The job of lining up, or collimating, the optics, is probably best left to an adult, though it's not terribly difficult to get it to an acceptable level. You've got to be a little careful, though...for one thing, some brands in the past have had have trouble reaching focus, due to inconsistencies in mirror focal length wrt. distance to the focuser. Others, Bushnell I believe, used a ridiculously large holder for the secondary mirror. Others neglected ventilation of the mirror so it's difficult to reach all important thermal stability. The last time I looked, the Orions didn't have any of these problems. Hopefully, there are recent reviews in Sky and Telescope. My heart is with the DIYers making their scopes from plans or kits, but unless you grind your own mirror, the cost advantage isn't huge. However, it is a good way to really become familiar with a telescope. Plus, you can do it right. Also, a DIY scope can result in a rock solid mounting, especially if you overbuild with 3/4" thick plywood. As far as I'm concerned, aperture is paramount. I wouldn't consider anything below 4 1/4 inch. Actually if an adult is going to do all the toting, even an 8" isn't excessive. You would, though, have to lift the 3 year old up to the eyepiece. Not sure about a 4 1/4", though, although that has the best chance of being easy to reach for a small child. Then there's the question of having a go-to feature or not. As far as I'm concerned it's just extra money to spend on a telescope. I think it's sort of fun to use the traditional finder (including the Telrad and similar) and track objects down. Some objects, such as M42 in Orion, are rather easy to find (it's the center "star" in Orion's sword). And Jupiter is still up at night - as far as I'm concerned, Jupiter is the king of celestial objects, offering a wonderful variety of surface features and interactions with its moons, such as shadow transits.
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Lazy8
Location: The Gallatin Valley of Montana Gender:
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Posted:
Dec 3, 2009 - 3:46pm |
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Reflectors make better telescopes than refractors (like the Galileoscope) but they are also a much bigger investment in either money or time. They are bigger and heavier too. If you just want to try astronomy (or like me, were too cheap to buy a spotting scope to take to the range) a refractor makes a better starting point. If you decide standing around on cold clear nights waiting for the object you want to see to rise above the overly-lit urban horizon isn't for you you haven't sunk a fortune into the hobby.
You can't beat the price of the Galileoscope (even tho you're paying two) and you get the warm fuzzy of donating one to some worthy village somewhere. Bummer about delivery; I waited 6 months for mine since I ordered before their first shipment. If your recipient can handle an IOU then it still might work. Otherwise there are all kinds of refracting 'scopes for sale in even sturdier packages.
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dionysius
Location: The People's Republic of Austin Gender:
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Posted:
Dec 3, 2009 - 3:31pm |
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Lazy8 wrote:One of these. Good cause, and it's not a bad 'scope either. You build it from a kit. A regular photo tripod works fine with it. Got a piece of crap "Galileo-style" telescope sitting on our coffee table right now. Gonna wait until we can afford a good Celestron: THEN we'll be doing some backyard astronomy!
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Red_Dragon
Location: Dumbf*ckistan
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Posted:
Dec 3, 2009 - 3:31pm |
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MrsHobieJoe wrote:Anyone got any telescope recommendations?
HJ and the kids have asked for one for Christmas. Must be totally indestructible in order to withstand our 3 year old.
Try a Dobsonian. They're available in a a wide range of sizes and prices and are pretty bullet proof. I'm sure there are plans, kits and parts a-plenty via google as well.
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ScottFromWyoming
Location: Powell Gender:
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Posted:
Dec 3, 2009 - 3:26pm |
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Lazy8 wrote:One of these. Good cause, and it's not a bad 'scope either. You build it from a kit. A regular photo tripod works fine with it.
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Lazy8
Location: The Gallatin Valley of Montana Gender:
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Posted:
Dec 3, 2009 - 3:08pm |
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MrsHobieJoe wrote:Anyone got any telescope recommendations?
HJ and the kids have asked for one for Christmas. Must be totally indestructible in order to withstand our 3 year old.
One of these. Good cause, and it's not a bad 'scope either. You build it from a kit. A regular photo tripod works fine with it.
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MrsHobieJoe
Location: somewhere in Europe Gender:
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Posted:
Dec 3, 2009 - 3:02pm |
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Anyone got any telescope recommendations?
HJ and the kids have asked for one for Christmas. Must be totally indestructible in order to withstand our 3 year old.
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rosedraws
Location: close to the edge Gender:
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Posted:
Nov 18, 2009 - 12:25pm |
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Zep wrote:Space Weather News for Nov. 18, 2009 http://spaceweather.comFIREBALLS AND METEORS: As forecasters predicted, the Leonid meteor shower peaked during the late hours of Nov. 17th, favoring sky watchers in Asia with an outburst of 100+ meteors per hour. Just as the outburst was dying down, an even bigger event took place over the western USA. Something hit Earth's atmosphere and exploded with an energy equivalent of 0.5 to 1 kiloton of TNT. Witnesses in Colorado, Utah, Idaho and elsewhere say the fireball "turned night into day" and "shook the ground" when it exploded just after midnight Mountain Standard Time. Researchers who are analyzing infrasound recordings of the blast say the fireball was not a Leonid. It was probably a small asteroid, now scattered in fragments across the countryside. Efforts are underway to measure the trajectory of the asteroid and guide meteorite recovery efforts. WOW!!
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Zep
Location: Funkytown
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Posted:
Nov 18, 2009 - 12:23pm |
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Space Weather News for Nov. 18, 2009 http://spaceweather.comFIREBALLS AND METEORS: As forecasters predicted, the Leonid meteor shower peaked during the late hours of Nov. 17th, favoring sky watchers in Asia with an outburst of 100+ meteors per hour. Just as the outburst was dying down, an even bigger event took place over the western USA. Something hit Earth's atmosphere and exploded with an energy equivalent of 0.5 to 1 kiloton of TNT. Witnesses in Colorado, Utah, Idaho and elsewhere say the fireball "turned night into day" and "shook the ground" when it exploded just after midnight Mountain Standard Time. Researchers who are analyzing infrasound recordings of the blast say the fireball was not a Leonid. It was probably a small asteroid, now scattered in fragments across the countryside. Efforts are underway to measure the trajectory of the asteroid and guide meteorite recovery efforts.
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