For the first time in more than a decade, Mercury, Mars, Venus, Saturn, and Jupiter — the five planets bright enough to be seen with an unaided eye — will all be visible at once in the sky.
You’ll have to wake up early to catch it. Starting January 20, it will be possible to see all five planets in a row, about 45 minutes before sunrise, Sky and Telescope reports. The planets should be visible in this arrangement until February 20.
(Sky and Telescope notes it might get harder to see Mercury after the first week of February, because of its low position near the horizon).