As everyone knows, the apparent motion of the planets is caused by the motion of the planet about the sun combined with that of the earth. The relative motion of Mars, for instance, may be ...

Its velocity with respect to the sun is about 311,000 miles per hour ... That’s the fastest apparent motion of any star.

The Kodaikanal Solar Observatory run by the Indian Institute of Astrophysics located on the southern tip of India has recorded images of the Sun every day since 1904 As a result the KSO is one of ...

In astronomy circles the term is “apparent retrograde motion ... Venus rotates on its axis in retrograde motion to most other planets — the sun would rise there in the west and set in ...

Is it geologically active? How did it get so close to the sun? But, at least, its strange apparent motion is well understood. "There's nothing fancy about it," Daylan said. This story has been ...

Sirius, the Dog Star, is difficult to ignore. Ostentatiously scintillating on the southern horizon right now, the “Searing ...