The Hubble Space Telescope has captured a stunning new image of the Trifid Nebula, marking its 36th anniversary in orbit. Released by NASA on April 20, 2026, the observation highlights a dynamic star-forming region located 5,000 light-years from Earth in the constellation Sagittarius.
The image, taken with Hubble’s Wide Field Camera 3, reveals young massive stars sculpting their surroundings through intense ultraviolet radiation. This radiation ionizes nearby gas, causing it to glow brightly and shaping the nebula’s distinctive three-lobed appearance that gives the Trifid its name.
Astronomers compared this 2026 image to one captured by Hubble in 1997, allowing them to observe changes in the nebula over nearly three decades. The comparison was made possible by upgrades to Hubble’s instruments during Servicing Mission 4, which improved sensitivity and field of view.
Within the frame, researchers identified Herbig-Haro 399—a periodic plasma jet ejected from a young protostar. Changes in this jet enable scientists to measure flow speeds and assess how much energy the newborn star injects into its environment, offering insight into early stellar evolution.
The nebula also features a reddish-brown cloud of gas and dust resembling a sea slug’s head and body, shaped over at least 300,000 years by winds from massive stars outside the field of view. These winds continue to compress the cloud, triggering new phases of star formation.
NASA emphasized that the Trifid Nebula serves as a natural laboratory for studying how newly formed stars interact with and alter their surroundings, providing valuable data on the processes that govern stellar birth and evolution.
