Uranus' accidental discovery 240 years ago greatly enhanced our understanding of the solar system, doubling the size of the ...

Seven planets are aligning in the night sky this week, creating a brief chance to see a "planetary parade." Worldwide, the best day to see the alignment is today, Feb. 28. Mercury, Venus ...

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.

The planetary parade — what appears to be a straight-line formation of several planets in the night sky — is expected to grace our night skies on Friday, Feb. 28. While it won’t be easy to ...