If you havent seen Comet NEOWISE yet, time is running out. As comets get closer to the sun, some of the ice melts and gases in the comet sublimate. Its name is Rosetta, and it flew to Comet 67P, orbited it, and then deployed a lander, named Philae, onto the surface! Here are a couple of photos of Comet 67P -- one from Rosetta in orbit, and another from Philae on the surface! Comet 67P (NASA)

Heres a nice shot of Comet NEOWISE, shot this past weekend by Mike Thompson in White Lake, Mich. Keep in mind that this is a fifteen second exposure -- its not what youd see with the naked eye:Comet NEOWISE (Mike Thompson)Comet NEOWISE is not what we scientists call a Great Comet. In other words, its not so bright that it can be seen prominently in the sky with the naked eye. Until now, to see Comet NEOWISE you had to get up at 5 a.m. And I know a LOT of people who will never get up at 5 a.m. Not even for a comet. However, I have good news: Over the next week, NEOWISE will transition to an evening object! And if you miss Comet NEOWISE this time, dont worry -- itll be back in 8,000 to 9,000 years. Comet 67P (NASA)