Babies grow up fast, in the blink of an eye, and thus their parents wish to record their growth without missing any moment. This is true not only for human babies but also for baby stars, called protostars, although the recorders are not parents but astronomers. Protostar ages, or evolutionary stages, have been determined from observations at near- and mid-infrared wavelengths. The youngest stage, called Class 0, is defined by non-detection at these wavelengths, corresponding to < 300,000 years ...
Babies grow up fast, in the blink of an eye, and thus their parents wish to record their growth without missing any moment. This is true not only for human babies but also for baby stars, called protostars, although the recorders are not parents but astronomers. Protostar ages, or evolutionary stages, have been determined from observations at near- and mid-infrared wavelengths. The youngest stage, called Class 0, is defined by non-detection at these wavelengths, corresponding to < 300,000 years ...
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