Tuesday, February 7, 2012

I need a pic of a star map WITH longitude and latitude!?!?!?

I've searched everywhere on google, yahoo, bing images but i cannot find a star map WITH longitude and latitude shown on it plzz help!!I need a pic of a star map WITH longitude and latitude!?!?!?
Star maps are notated in Right Ascension and Declination. Only land maps are notated in latitude and longitude.

http://en.wikipedia.org/wiki/Equatorial_鈥?/a>

http://www-istp.gsfc.nasa.gov/stargaze/S鈥?/a>
Because the celestial sphere (apparent location of stars) rotates around Earth, you're not going to find a star map with longitude. Latitude comes into play only with a planisphere, which tells you what stars are visible at a given time of day and time of year, but are designed for a specific latitude.

You might be able to find a star map with right ascension and declination noted on it; those are the terms used to refer to the celestial sphere when stargazing.I need a pic of a star map WITH longitude and latitude!?!?!?
Get one thing clear, the difference,
1. Latitude and longitude pertain to Earth, not to its orientation in Space. These strictly do with locations on the surface of Earth upon which we live, walk or drive. Nevertheless the same can be projected (extended) up into Space.
2. The Sky as we call it is studded with stars and some moving bodies (Sun, Moon %26amp; planets; comets, meteors and all that), like a wall-paper stuck there. But this wall paper(can't be seen in Sun's glare but is there) keeps shifting everyday due to Sun's apparent movement, but actually Earth moving in its orbit. Much more primary movement is its daily rotation around earth's axis because the Sun that causes sunrise, sunset etc is stuck on it for the time being. I need to explain it because the picture of Star-studded wall-paper, needs a system of location addresses so that we can converse and say so to some one in a distant place ("Look at that spot in 'Leo', RA / decl,: = 10h 15m/ 5掳 10' there is a meteor shower). hence a system of 'Right Ascension / declination' was devised with the starting point as Vernal Equinox (don't ask me what it is, now ?) at RA / decl,: = 0h 0m/ 0掳 0' 0". Well this is not prefect as it keeps changing every year @ 50"per annum; till some alternative gets found.
Now the problem: As you must have appreciated by now, Earth's rotation and revolution (in its orbit) makes these two systems ('lat/long' %26amp; 'RA/decl') with no simple link. It needs to be linked, based on 'Time' (Calender %26amp; 'local' time) and location (lat/long). But if you need (God bless you, you didn't say 'I want' like most Americans) a pic of a star map WITH longitude %26amp; latitude, you need to strive hard. The pic keeps changing by the "second". Available on the 'Net (Wiki) is a whole host of complex Mathematics. But, for your viewing both systems ('lat/long' derived from 'RA/decl') are useless and you need yet another (third) system derived from that earlier two, that gives the information as you view, "Az / El"(Azimuth / Elevation). One of them might be the one to answer your need. But before; try to know the rudiments of it, so as to use it. Having asked the question, display the same enthusiasm and go to one such site.I need a pic of a star map WITH longitude and latitude!?!?!?
Star maps are not marked with longitude and latitude; positions in the sky are referred to right ascension and declination. Here's an online star atlas marked in right ascension and declination:

http://www.geocities.jp/toshimi_taki/atl鈥?/a>
You won't ever find longitude but you CAN find longitude HOURS... and latitude.
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