Note: Single-source report; awaiting corroboration.
NASA's Hubble Space Telescope has captured a detailed image of the Trifid Nebula, a star-forming region about 5,000 light-years from Earth. This view highlights a rusty-colored gas and dust cloud resembling a marine sea lemon, with young stars and jets of plasma ejected by protostars embedded within the nebula.
Hubble’s upgraded camera, installed during Servicing Mission 4, provides a wider field of view and greater sensitivity. This has enabled observations of the nebula over nearly 30 years, from its first imaging in 1997 to recent data.
A key feature is Herbig-Haro 399, a jet of plasma periodically emitted by a young protostar. By comparing images over time, researchers can measure the velocity of these outflows and estimate the energy the protostar transfers to its environment, aiding understanding of how young stars interact with surrounding gas and dust.
Additionally, ultraviolet light from massive stars outside the field appears to erode circumstellar disks around some young stars, seen as green arcs near protostars and clearings in dust clouds. These features suggest some protostars are nearing the end of their formation.
Hubble's ongoing monitoring of the Trifid Nebula continues to provide valuable data on star formation and the evolution of stellar nurseries in our galaxy.