Herbig–Haro (HH) objects are bright patches of nebulosity associated with newborn stars.
The magnificent cloud is a valuable laboratory for studying star formation because of its close vicinity (1,344 light-years from the Sun). Its size and proximity, which spans 24 light-years, make it visible to the naked eyes, reported ScienceAlert on Sunday.
“This observation was also part of a spellbinding Hubble mosaic of the Orion Nebula, which combined 520 ACS images in five different colors to create the sharpest view ever taken of the region,” ESA documented.
“The Orion Nebula is awash in intense ultraviolet radiation from bright young stars.”
Hubble can clearly see the shockwaves created by the outflows, but this radiation also draws attention to the slower-moving stellar material currents. This enables astronomers to see jets and outflows up close and understand their structures.
What are Herbig–Haro (HH) objects?
HH objects are created when fast-moving, nearby clouds of gas and dust clash with narrow jets of partly ionized gas expelled by stars at the speed of several hundred kilometers per second.
The objects are frequently observed around a single star, aligned with its rotating axis, in star-forming regions. Although some have been seen several parsecs away, the majority of them are located within around one parsec of the source.
Parsec is a unit of distance used in astronomy, equal to about 3.26 light-years.
These objects, which are bright regions surrounding young stars, are created when stellar winds or jets of gas emitted by these stars collide violently with neighboring gas and dust.