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).

The two innermost planets, Venus and Mercury, will shine together low in the western sky at sunset on March 10. Here's how to get the best view before they disappear.

A clear, haze-free sky also helps. The remark about Copernicus ... Currently, Mercury sets about 90 minutes after sunset; about a half hour after sundown look for it about 10 degrees above the ...