The six planets were visible in the days immediately leading up to Jan. 21, and for about four weeks afterward. Mars, Venus, ...

Six planets are lining up in a row from our Earthly view of the cosmos, in a spectacle that'll be visible in January through ...

"A parade of planets, also sometimes referred to as a planetary alignment, is when several planets in our solar system appear to line up in the sky from our perspective here on Earth," John Conafay, ...