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.

Feb. 15: Night sky presentation and workshop with Serena Sanborn and John Meader, 1-3 p.m., including a tour of the exhibition at Waterfall Arts. Free and open to the public. Feb. 22: Talk by ...