apparent movement of stars


by shirin
Tags: apparent, movement, stars
shirin
shirin is offline
#1
Sep11-13, 02:16 AM
P: 33
Hello everybody!
I read that because of about 4 min difference between sidereal day and solar day, at the end of a year each star has rotated 366.25 times(apparently). I looked up in software such as Starrynight, the position of for example Sirius at 1 September of 2013, 2014, 2015 and so on. I recognized that it goes up for 3 successive years and returns back to its first position at forth year. Why is it so?

Thanks
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Drakkith
Drakkith is offline
#2
Sep11-13, 02:21 AM
PF Gold
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Leap year?


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