Monday, January 23, 2012

What is the farthest north you can be and see the Southern Cross?

I heard the Southern Cross star constellation can be seen from parts of the Northern Hemisphere. Is this true? If so, what is the farthest northern latitude that you can see the Southern Cross?What is the farthest north you can be and see the Southern Cross?The southernmost star of the Southern Cross is Acrux at declination 63 degrees south. This star should therefore just appear above the horizon (together with the rest of the Southern Cross) from latitude (90 - 63) degrees, which is 27 degrees north.What is the farthest north you can be and see the Southern Cross?Yes, it's true. The southern cross is at a bit more than -60 degrees declination, so you can see it at 90 - 60 = 30 degrees north or less (actually, it's around 63, so more like 27 degrees latitude).What is the farthest north you can be and see the Southern Cross?Assuming a flat horizon, to see Acrux, the southernmost star in Crux, you need to be south of 27掳 N latitude. The southern tip of Texas or Florida south of West Palm Beach.
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