McNeall showed a line graph that one of his colleagues, climate scientist John Kennedy, created. Scientist obliterates ...

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.

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.

After Friday's spectacle, a "planet parade" of this size won't appear in the night sky for several years, experts say.

Bottom line is that you can only see about half the planets in this planetary lineup with a naked eye.” The best day to see the spectacle in Europe and North America will be Sunday, about half ...

Seven planets will line up for a rare "planetary parade" today (Feb. 28) and you can watch it live online, beginning at 12:00 p.m. ET (1700 GMT).