Figure 11-12 T Tauri Star (a) Protostar HH 30 is emitting gas primarily as two opposed jets. Called a T Tauri star, it is not yet on the main sequence. The star is hidden inside a disk of gas and dust. (b) The Herbig Haro objects HH1/HH2. These two glowing regions are on opposite sides of a T Tauri object in the constellation Orion. The two outer edges of these objects are separated by about 1 light-year.