What it is: The Rosette Nebula Where it is: 5,000 light-years away, in the constellation Monoceros, the unicorn. When it was shared: Oct. 1, 2024 Why it’s so special: The Rosette Nebula is a big deal. At about 130 light-years across, it’s roughly five times the size of the Orion Nebula — the closest star-forming […]