The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

the visitor's passage altered the giant planets' orbits to approximately their current state. The interlopers in these near matches dove straight into the solar system, traveling way past Uranus ...

Exoplanets have captured the imagination of the public and scientists alike and as the search continues for more, researchers ...

An exoplanet is a planet outside our solar system that usually orbits a star in our galaxy. More than 7,000 have been found ...

Uranus and Neptune are there too, technically, but they don't appear as 'bright planets'," NASA's Preston Dyches explained in a stargazing video guide. Stock illustration of all the solar system's ...

Because planets always appear in a line, the alignment isn't anything out of the norm. What's less common is seeing so many bright planets at once.

Venus, Jupiter, Mars, Saturn, Neptune and Uranus — are likely to align in the night sky by the end of January, according to ...

Mars, Venus, Jupiter, Saturn, Uranus and Neptune will appear together in a row throughout the start of February – although Neptune and Uranus will only be visible with binoculars or a telescope.