Mercury is making a rare ‘transit’ across the sun. Here’s how to watch.

Skywatchers around the world have the opportunity to witness a rare astronomical event Monday that occurs just 13 times each century.
Mercury, the smallest planet in the solar system, is set to inch across the face of the sun in what’s known as a “transit,” and several organizations are planning to broadcast the celestial event live online.During the Mercury transit, the planet will pass between Earth and the sun, and while this chance alignment occurs, skywatchers here will b