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 ...

In the remote outer reaches of planetary systems, far beyond the orbit of known planets, enormous and mysterious worlds ...

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 ...

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 ...

Barnard’s star is the second closest star system to the Sun, and the nearest single ... Regardless of whether there are indeed more planets around Barnard's Star, the researchers are excited ...

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

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

This path, known as the ecliptic, is the same one that the sun travels along during the year. This happens because the planets orbit around the sun in the same plane. Dr. van Belle likened the ...

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.