C23 – Hubble Caldwell 23Spanning some 100 000 light-years, Caldwell 23 is seen exactly edge-on, revealing its thick plane of dust and interstellar gas.Credits: ESA/Hubble & NASA; Acknowledgment: Nick Rose Download Share Tags Hubble Space TelescopeImage CreditESA/Hubble & NASA; Acknowledgment: Nick RoseSize1024x1063px