With an equatorial diameter of 7926 miles (12,760 kilometers), our planet Earth is the biggest of the terrestrial planets and the fifth largest planet in our solar system. It is the only planet in the ...

However, you might be surprised to know that Earth is not alone in having volcanoes – in fact, it’s beaten numerically by the ...

The controversy endures over Pluto's true status, but the solar system underdog continues to capture hearts across the globe.

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary status.

Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.

High-pressure experiments generated the first direct observation of plastic ice, which has qualities of both crystalline ice and liquid water.

Pluto may not be a planet any more, but you still have a chance to see the distant dwarf planet at one of Michigan's ...

Astronomers have peered through the atmosphere of a planet beyond the solar system, mapping its 3D structure for the first ...

The gas giant WASP 121b, also known as Tylos, has an atmospheric structure unlike any we have ever seen, and the fastest ...

The Qatar Calendar House announced that Venus, the brightest planet in our solar system, will reach its closest point to the ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...

DOHA: The Qatar Calendar House announced that Venus, the brightest planet in our solar system, will reach its closest point to the sun (perihelion) on Wednesday evening, Sha'ban 20, 1446 AH, ...