Unable to view our graphics? Click here to see them ... It's not especially remarkable for a few planets to line up in the sky, but when we see four or five brilliant planets at once, it's ...

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.

While all seven planets could appear in some form in parts of the U.S., not all of them will be visible to the naked eye.

Off to the left will be the bright, reddish-orange Mars. While some planets line up in the sky fairly routinely, the next time the seven planets will line up is 2040. Not everyone will be able to ...

While the lineup is not unusual, it is rare for all seven planets to line up at once and won't happen again until 2040. For much of the week, all of the planets may be visible except for Mercury ...

The different speeds of the planets mean that, on occasion, several of them can be roughly lined up on the same side of the Sun. From Earth, if the orbits line up just right, we can see multiple ...

Skywatchers will get a cosmic treat this week with a celestial gathering of planets. A planetary alignment ... remarkable for a few planets to line up in the sky, but when we see four or five ...