There are eight planets in the solar system, and each travels on its own path around the sun. But of these planets, which is nearest to the sun? Mercury is a strange little world. There are some ...

How big it is: 865,000 miles (1.392 million kilometers) across How far away it is: 93 million miles (150 million km) What ...

Was there ever a planet closer to the Sun than Mercury? Explore the captivating theory of Vulcan, a world that has challenged astronomers' understanding of the solar system for decades. Donald ...

Scientists have identified an object about 700km wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting it as it travels on a highly elongated ...

According to the National Weather Service, the summer solstice will occur on Friday at 10:42 p.m. Eastern time (it will be ...

The European Space Agency's Solar Orbiter captured the first-ever images of the sun's south pole in March, which were ...

Some scientists think they discovered a new dwarf planet at the edge of the solar system, so far away that it takes around 25 ...

The way comets behave in space may seem random, but new research suggests there’s more order behind the chaos than once ...

New research on the orbits of these mysterious asteroids near Venus stress the need for better space rock surveillance.