March 26, 2011
The elements that make you — the calcium in your bones, the oxygen in your lungs — were scattered across space by dying stars long before...
T Tauri and Hind's Variable Nebula
Birthday · March 26, 2011
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APOD published March 26, 2011. Credit: Adam Block. A publication-date match, not a photo taken on your date. Independent of NASA.
The yellowish star near center in this remarkable telescopic skyview is T Tauri, prototype of the class of T Tauri variable stars. Nearby it is a dusty yellow cosmic cloud historically known as Hind's Variable Nebula (NGC 1555). Over 400 light-years away, at the edge of a molecular cloud, both star and nebula are seen to vary significantly in brightness but not necessarily at the same time, adding to the mystery of the intriguing region. T Tauri stars are now generally recognized as young (less than a few million years old), sun-like stars still in the early stages of formation. To further complicate the picture, infrared observations indicate that T Tauri itself is part of a multiple system and suggest that the associated Hind's Nebula may also contain a very young stellar object. The naturally colored image spans about 4 light-years at the estimated distance of T Tauri.
Image credit: Adam Block