Mercury is expected to enter retrograde, appearing to turn the ... This is referred to as prograde motion," a blog post by NASA's Astrophysics Science Division (ASD) explains.

For 400 years, astronomers have long believed it’s a basic fact of the universe that Mercury “goes into an apparent retrograde motion,” according to Vox. But in astrology, Mercury in ...

Scientists have revealed that in Earth-moon space, DRO is characterized by a prograde motion around Earth and a retrograde motion around the moon. DRO, which provides a highly stable orbit where ...

This is referred to as prograde motion. However, periodically the motion changes and they move east-to-west through the stars. We call this retrograde motion. "The retrograde motion continues for ...

Objects that turn in the wrong direction are in a retrograde orbit, and they’re quite rare. In our solar system, all of the planets and most of the other objects orbit in a prograde motion, ...

It's been described as astrology’s most nerve-wracking event ...

To some it's just a quirky optical illusion - but others maintain it's a seriously ill omen ...