Monday, August 29, 2011

Does constellation varies on different part of Earth?

I live in Malaysia so does the constellation map available on the internet are the same as what will my night sky look like?|||No. Constellations will look the same from anywhere on Earth, or anywhere in the Solar System for that matter.





They would look almost identical even if you traveled to the Alpha Centaurian star system. You'd have to travel many light-years to notice any appreciable difference.|||Your latitude shifts the north (%26amp; south) horizons amongst the stars. If you shift south (to lesser latitudes like Malaysia from London), the map gets shifted south putting more northern stars below your north horizon while lifting more of the southern stars into view, from their previous hiding under the southern horizon.

There is always a patch of the 'map' in view round the clock (day or night; but in Sun's intense glare you can't see them) around the North Pole Star (Polaris) called 'Circumpolar' stars. On the southern end of the horizon a similar patch of equal area around South Pole, is never visible (below the horizon always); you can call 'Circumpolar invisible' stars. At Equator there are no circumpolar stars of either description.

However, optical phenomena at horizon, haze etc makes star visibility poor affecting 'viewing' unlike the above described ideal case. On the horizon the atmospheric refraction (as rays pass through maximum distance in the atmosphere) actually lifts a star from below the horizon into view. All these effects add up to reduce viewing in general. Once while going on a ship in 'Bay of Bengal' during Full Moon time I hoped to see the Moon touching the waves while rising %26amp; setting. But instead I was disappointed when the Moon before reaching the horizon gradually melted away (like a pat of butter). Stars are affected worse.

Or else everywhere one can hope to see the same stars at the same local time like Sun %26amp; Moon that we take for granted. Only fast phenomena like eclipses happening in less than 24 hours, last only while a particular geographical area is viewing them and others miss them.|||The positions of the stars are the same anywhere on Earth. Official astronomical constellations are also the same (to keep it uniform when astronomers discuss stellar locations/etc)


Internationally, different countries and cultures have assigned different names to various groupings and have even grouped the stars differently - and thus have different mythologies and 'constellations'. These are not ''official'' in astronomical terms, but they are interesting to learn.|||The stars are all so far away from Earth that their patterns don't change. However, your location will determine what constellations are visible on a particular night at a particular time. A planisphere or computer planetarium software will help you with this.|||They do look different as in there are different stars in the north hemisphere and the south hemisphere.|||constellation map for Malaysia will. The earth hides most stars from where your standing

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