For a few evenings around 28 February, every planet in the solar system will be visible in the night sky, thanks to a rare ...

Early in our Solar System’s history, bits of icy debris were scattered and then gradually coaxed into a spiral alignment in ...

The only planet that is out of the viewing loop this month is Saturn, which is too close to the sun to be seen, reaching solar conjunction on March 12. Earth will pass through the plane of Saturn ...

The astronomical linkup is fairly common and can happen at least every year depending on the number of planets.

Seven planets will align in a rare planetary parade, offering a view of five planets visible to the naked eye in the night ...

Stargazers will be treated to a rare alignment of seven planets on 28 February when Mercury joins six other planets that are already visible in the night sky. Here's why it matters to scientists.

Clear skies will also be necessary to see all the planets. The planets in the solar system orbit the sun, just as Earth does. Every planet orbits at a different speed and distance. During these ...

Like the planets in our solar system orbit the sun, most exoplanets also orbit a star. To date there are over 5500 known exoplanets confirmed by NASA, with trillions more predicted to exist within ...

It is being called a "planetary parade" as seven planets are expected to be seen in the Earth's night sky on Friday, ...

A planetary alignment happens when planets “line up” on the same side of the sun. The phenomenon is visible this month ...

The solar system has eight planets. Moving out from the sun ... The new definition requires that a planet: orbit the sun is large enough to be round has cleared its orbit of other small bodies.

(Correction: An earlier version of this story misstated how far Pluto is from the sun ... planet. Here's what to know about the short life of what was, for a single human lifetime, the solar ...