Mercury is an odd little planet. The closest world to the Sun has some extreme surface structures, steep hills and cliffs, which have long been suspected to be the effect of the planet’s interior ...

Mercury is the closest planet to the sun and the smallest planet in the solar system. Here we explore the strange world in more detail.

The elusive planet Mercury reaches its furthest point from the sun on Friday (Jan. 12), with this separation allowing skywatchers a rare chance to spot the tiny planet.

What is retrograde in astronomy? And how does it relate to astrology? We explain the movements of planets in the sky.

Pieces of Mercury may have been found on Earth, potentially allowing scientists to study the Solar System's innermost planet. While we have sent two spacecraft to Mercury – Mariner 10 and ...

The first Mercury retrograde of 2025 is here, and this one is going down — or slowing down, in the insolent, fire-breathing sign of Aries and the idealistic, hallucinogenic tidal pools of Pisces.

Planetary scientists have long known that Mercury has been shrinking for billions of years. Despite being the closest planet to the Sun, its interior has been cooling down as internal heat leaks ...

A pair of still-attached probes just completed the closest flyby of the solar system’s least explored planet, capturing the first clear view of Mercury’s impact craters. BepiColombo pulled off ...

The planet Mercury could have a layer of diamonds up to 18 kilometers, or 11 miles, thick, tucked below is surface, scientists say.

Retrograde calendar for 2023 Mercury retrograde Mercury completes its orbit in about 88 days, which is why we typically experience three to four Mercury retrogrades each year.

Shrinking planet Mercury is still getting smaller, new research finds The first evidence of Mercury's shrinkage came in 1974 when the Mariner 10 mission transmitted pictures to Earth ...