The planet Mercury is mainly made up of iron. Mercury has no moons. The planet's close proximity to the Sun makes having moons impossible, as the star's strong gravitational pull would likely pull ...

A new study indicates that Mercury's core-mantle boundary (CMB) may possess a diamond layer that extends up to 18 kilometers ...

Mercury and Venus retrograde, two of the many celestial events some believe can cause turmoil, ended this month.