Stellar2026-02-151 minarXiv:2602.14304expressLighthouse Stars in Distant GalaxiesIn distant galaxies, old stars swell and redden. Among them are two groups that act like lighthouses: some have just ignited helium burning, while others are already burning carbon and oxygen.Wendy L. Freedman·Barry F. Madore·Taylor Hoyt·In Sung Jang·Abigail J. Lee·Kayla A. OwensHubble's lawAdam RiessBrian SchmidtEdwin HubbleHubble Space Telescoperedshiftphotometric distanceHubble Space Telescopegalaxy👍👎☆SimplePopularAdvanced