A celestial game of hide and seek will take place in the night sky on Jan. 13, and lucky space fans across most of the US can witness the fun. Mars will look reddish and bright as the moon passes in front of it, obscuring the planet for over an hour in some areas. This is known as an occultation. "An occultation is when one celestial object passes directly in front of another, hiding the background object from view," NASA said in a skywatching guide.The timing of Mars' disappearing act will vary depending on your location. It'll be visible from the contiguous US. The Astronomical League published a map with viewing timesfor major cities across the country. Set a reminder to catch both the disappearance and reappearance of the only planet in the solar system where we have rovers exploring the surface. Enlarge Image A NASA view of Mars shows the planet's bright ice cap. NASA/JPL/USGSThe Astronomical League suggests using binoculars for the event and starting your viewing 10 minutes ahead of time so you can spot Mars before the moon covers it up. You may have to hunt around to find the planet when it returns to the sky."Mars' time and position of reappearance is difficult to judge since the planet lies concealed behind the moon beforehand," the league said.The moon will be full during the Mars occultation. January's full moon is popularly known as the Wolf Moon, so you can imagine the Wolf Moon gobbling up Mars and then spitting it out again.January is full of good skywatching events, including a parade of planets and the fiery show of the annual Quadrantids meteor shower.This is a particularly fun month for viewing Mars. The red planet reaches opposition when it's opposite from the sun, with Earth in the middle by the evening of Jan. 16. It's the closest Mars will be to Earth this year, so the planet can appear a little brighter than usual. Look to the east after sundown and to the west near sunrise to find Mars.As the moon does its sleight of hand on Jan. 13, be sure to wave goodbye and then wave hello again to NASA's Perseverance and Curiosity rovers far away on the red planet. They'll be hard at work exploring Mars while you're enjoying the magic show from Earth.