ICEINSPACE
Moon Phase
CURRENT MOON
Waxing Gibbous 79.8%
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05-10-2016, 03:34 PM
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Registered User
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Join Date: Apr 2014
Location: Sydney
Posts: 71
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Planisphere
I am wondering is Planisphere can be used all year round?
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05-10-2016, 03:46 PM
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Registered User
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
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Sure can.
Just set the dial to the required date.
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05-10-2016, 08:19 PM
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Registered User
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Join Date: May 2008
Location: Auckland, NZ
Posts: 239
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Not only that, the battery doesn't go flat, you don't need an internet connection and you can fan yourself if it's hot.
Steve.
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06-10-2016, 09:49 AM
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Not even a speck of dust
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Join Date: Jun 2012
Location: Canberra
Posts: 1,474
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Besides being a great fly swatter and a beer coaster I have a followup question. Do planispheres "drift out of alignment"? in that is its calendar only accurate for one year and each year is out by a day or so? So do they have a usable lifespan or are they perpetually usable? Maybe similar to how a calendar is only accurate for one year yet about 12yrs or so on it will be perfectly accurate again.
I appreciate that probably for a lifetime its drift wont make the planisphere unusable but will its calendar drift away and back again periodically so for practical use its perpetual?
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06-10-2016, 10:43 AM
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Registered User
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Join Date: May 2008
Location: Auckland, NZ
Posts: 239
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It's reasonable to say that it's good for your lifetime. Mine has a table of planet positions that only goes as far as 2020 but the star positions are the same year after year.
You can't beat them for explaining how the Milky Way moves across the sky.
Steve
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10-10-2016, 07:32 AM
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Not even a speck of dust
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Join Date: Jun 2012
Location: Canberra
Posts: 1,474
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thanks, so its probably the best investment you can make in astronomy. It's rare to be able to buy anything that actually can work for an actual human lifetime
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11-10-2016, 04:42 PM
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Registered User
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Join Date: Apr 2014
Location: Sydney
Posts: 71
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Thanks.
Any place can find the planisphere available?
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11-10-2016, 09:17 PM
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Registered User
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Join Date: Sep 2011
Location: margaret river, western australia
Posts: 6,070
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I think any Dymocks or Angus and Robertson will either have one, or
will get one in for you. I'm pretty sure that Sky and Telescope magazine
also sell them via ads in the magazine.
raymo
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11-10-2016, 10:02 PM
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Registered User
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Join Date: Sep 2016
Location: Rockingham
Posts: 37
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IceInSpace shop right here sells them for $15.
National Geographic shops sell a large plastic one for about $27.
Download an app for your smart phone.
Sky portal - free
Star chart - free
They show you what's in the sky now. Great tools for the amateur astronomer.
Happy sky hunting.
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