Register to reply

Apparent movement of stars

by shirin
Tags: apparent, movement, stars
Share this thread:
shirin
#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
Phys.Org News Partner Astronomy news on Phys.org
Planets with oddball orbits like Mercury could host life
Hubble paints a spattering of blue in irregular galaxy IC 559
The entropy of black holes
Drakkith
#2
Sep11-13, 02:21 AM
Mentor
Drakkith's Avatar
P: 11,997
Leap year?


Register to reply

Related Discussions
Binary stars apparent and absolute magnitudes... Introductory Physics Homework 1
How does the movement of stars compare to the movement of planets Astronomy & Astrophysics 12
Can two stars have the same apparent but different absolute magnitudes Astronomy & Astrophysics 6
Apparent magnitude of two stars Advanced Physics Homework 7
Calculate combined apparent magnitude of two stars Introductory Physics Homework 4