The answer to these will be different for different locations on the Earth.
(1) Basically, for a location along latitude L, all stars to the north of (90-L) will be visible. For example :
at latitude 30N, all stars to the north of 60N will be visible all year(週年可見) because they are always above the northern horizon. If you have a star map, just find the constellations north of 60N.
(2) All stars to the south of 60N will not be visible all year (不是週年可見).
Furthermore, all stars to the south of -L (that is 30S in this example) will NOT be visible (週年不可見) because they are always below the southern horizon.
發表於 2011-8-4 21:34:04
發表於 2011-8-4 21:56:26
