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September 2026
- How Artemis 2 brought back Moon joy
- Why we need in-orbit refueling to return to the Moon
- Artemis’ technology and medicine innovations
- How massive star clusters shape their galaxies
Picture of the Day
The Hidden Nebula’s glowing edge
Patrick Cosgrove from Honeoye Falls, New York
Sharpless 2–140 is sometimes called the Hidden Nebula for the way it appears to be partially swallowed by the neighboring dark cloud LDN 1204, adjacent to the bright shock front of ionized gas. It glows about 3,000 light-years away in Cepheus. The imager took just over 12 hours of exposure with a 5.2-inch f/5.6 refractor in the Hubble palette, plus RGB data for the stars.











