As the closest planet to the Sun, Mercury is exposed to the star's enormous gravitational field. And it's really stressful.

Mercury doesn't give up its secrets easily. The smallest planet in our solar system is also one of the most extreme—a ...

Mercury is by far the smallest planet in the solar system, with only around 5.5% of both the mass and volume of Earth. Despite that diminutiveness, Mercury manages to be the second-densest planet ...

Mercury is a planet of extremes. With a total volume little more than the Moon, it is the smallest planet in the Solar System and is situated the closest to the Sun. Mercury has no atmosphere to ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to CuriousKidsUS@theconversation.com. Are planets in the solar system that are closer ...

Mercury will retrograde from Dec. 13 through Jan. 2 in the last of four times it appears to move backward in the sky this year. Every planet has in our solar system has retrograded for at least ...

all the planets of our solar system on display. The phenomenon — also known as a "planet parade" — allows people to see planets Mercury, Venus, Mars, Jupiter and Saturn with their naked eye.

As 2022 comes to an end, skywatchers can take in the rare sight of all of the planets in our solar system (aside from Earth) together in the sky. Mercury, Venus, Mars, Jupiter and Saturn are all ...