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 ...

The first two weeks of March provide a great opportunity to sight four bright naked-eye planets in the early evening sky. Low toward the west blazes Venus, which serves as a convenient celestial ...

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.