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Where on Earth are you if Polaris is on your horizon?
No. Polaris cannot be seen at any point (0.5 degrees) south of the equator.
In the northern hemisphere Polaris can be seen in any month of the year.
A planet is said to be in retrograde motion when its apparent motion - the motion as seen by us, against the background stars - is from east to west.Planets spend more time in prograde motion, from west to east. The apparent movement of Sun and Moon against the background stars is also from west to east. Not to be confused with the daily motion, due to Earth's rotation.
Also known as the North Star, Polaris, is located within one degree of the north celestial pole - the point of Earth's axis of rotation. This means that the Earth's (geographic) north pole is pointing almost exactly to the point in the sky where Polaris is located. For this reason, Polaris can be seen by anyone in the northern hemisphere throughout the year.
Your at the equator if you see Polaris at the horizon
Your at the equator if you see Polaris at the horizon
As seen from Earth, yes, Sirius is the brightest star in the night sky. In terms of actual brightness, no.
From Antarctica, for example.
Polaris is more commonly known as the North Star or Pole Star because its position in the northern night sky almost exactly marks the Earth's geographic north pole.
The earth never reverses direction, nor does any other planet. The APPARENT reversal of direction of some other planets, as seen from earth, is called retrograde motion.
On any night of the year, Polaris can be seen from the northern hemisphere and cannot be seen from the southern one. (Assuming the sky is clear in the north.)