It, too, is changing its position among the stars, but with a statelier mien ... As everyone knows, the apparent motion of the planets is caused by the motion of the planet about the sun combined ...

Barnard’s star has long fascinated astronomers because of its apparent motion against the backdrop of other stars. Most stars do not appear to move a discernable amount in a human lifetime.

It aligns with the Earth’s axis, allowing the telescope to follow the apparent motion of stars and planets across the night sky. Equatorial tables are specific to a location on the Earth ...

It aligns with the Earth’s axis, allowing the telescope to follow the apparent motion of stars and planets across the night sky. Equatorial tables are specific to a location on the Earth ...

As of today Mars will reverse its apparent west-to-east movement in the night sky and begin moving from east-to-west against the background stars. This is called “retrograde motion” and it ...