Over the next 10 days, the planet Mercury puts on an excellent display in the western twilight, though our closest planet to the Sun never appears very high. Find a low, level view to the west, and starting near 7:30 PM, scan a little more than a hand-width above the spot that would be level. It will be bright, but low.

The Big Dipper looks like a question mark in the northeast. After months of asking “when is Spring?”, follow this question mark’s curve to find a star that announces Spring to our skies. Rising near 8:00 PM this evening, the bright star Arcturus comes up in the east-northeast, arriving each March in the evenings.

Today marks the anniversary of the discovery of Pluto. Clyde Tombaugh was examining pictures taken through the telescope at the Lowell Observatory in Arizona in January, 1930, over a period of days. One of the “stars” in the image moved while the stars remained in place, revealing the frozen world for the first time.