On Jan. 13, bright Mars will disappear behind the full moon for several hours. It's the only lunar occultation of Mars visible from the U.S. this year. Here's how to get the most out of it.
On Jan. 13, bright Mars will disappear behind the full moon for several hours. It's the only lunar occultation of Mars visible from the U.S. this year. Here's how to get the most out of it.