How big is the ellipse that our planet travels in a year around the Sun? J.J. MüdespacherMexico City, Mexico Earth's orbit ...

In recent years, astronomers have developed techniques to measure the metal content of stars with extreme accuracy. With that ...

The movements of the planets in the Solar System are pretty difficult to get your head around, even before we get started on ...

The probe will orbit the sun "close enough to pass inside a solar eruption, like a surfer diving under a crashing ocean wave, ...

Ever since William Herschel discovered Uranus in 1781, astronomers have been eager to find new planets on the outer edge of ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the ...

We're showing that, everywhere we look now, there was some sort of magnetic field that was responsible for bringing mass to ...

It must have cleared all other celestial bodies, except its own moons, from its orbit.

In the time Pluto was found, classified as a planet and reclassified as a dwarf planet, it has not completed one orbit. One ...

We’re showing that, everywhere we look now, there was some sort of magnetic field that was responsible for bringing mass to ...

Scientists have developed a new method to compute how tides affect the interiors of planets and moons. Importantly, the new ...