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T Tauri

A very young yellow to orange star which hasn't reached the main sequence yet. So it hasn't started fusioning hydrogen so far. It still has a very large diameter, but collapses. The star gets its power from the accruing gravitational energy. It spins very fast and is quite active.

T Tauri is the prototype of the class of new born T Tauri stars. It has a companion and a dust disk. Furthermore it still resides in the cloud from which it evolved.

Constellation: Taurus
Age: 1 million years
Distance: 462 light-years
Spectral class: F8 - K1
Visual magnitude: 9.3 - 13.5
Luminosity: 3.7 * Sun

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Photo: Canada-France-Hawaii Telescope Corporation (CFHT)
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