Stargazers who have heard of an amazing planetary alignment coming later in January may be in for a letdown if they look up at the night sky expecting to be dazzled. Yes, six planets will be ...

the radial vector reducer actually has more bearing surfaces, and should be more durable as a result. Two cycloidal disks are driven by a planetary gear reduction for an even greater reduction, ...

A planetary alignment goes down, up high, when more than two planets align in the sky. If three planets align, it’s known as a mini-planetary alignment; four makes for a small planetary ...

In 2025, a special planetary alignment will offer skywatchers the chance to see six planets together. Among these, four will be visible without the aid of a telescope, while two—Uranus and ...

Planetary Geology involves the origin and age of the solid bodies in the solar system (planets, satellites, asteroids, comets, and rings) and the geological evolution of their surfaces and interiors.

the radial vector reducer actually has more bearing surfaces, and should be more durable as a result. Two cycloidal disks are driven by a planetary gear reduction for an even greater reduction, ...