This week's observing challenge: head outside and check out the globular cluster M4 in Scorpius! 🦂🔴 It's one of the closest globular clusters to Earth at just 7,200 light-years away and home to over 100,000 ancient stars packed tightly together. Look for M4 just to the right of Antares, the Scorpion’s fiery red heart. Through even small-to-medium backyard telescopes, you'll be able to resolve some of the brighter stars in the cluster. 🔭🤩 | Celestron