The James Webb Space Telescope (JWST) has revealed striking new details about Sagittarius B2 (Sgr B2) – one of the most massive and dense nebulae of gas and dust in our Milky Way Galaxy, located near the center of the Milky Way, about 390 light-years from the giant black hole Sagittarius A*.
See also: James Webb "illuminates" star birth in the heart of the Milky Way
Sagittarius B2 is known as a colossal “starburst,” filled with vast amounts of molecular hydrogen, dust, and complex organic molecules. Although it has been studied for decades, its high density and thick cosmic dust have made it difficult to observe with conventional telescopes. This is where JWST, with its infrared capabilities, comes in to reveal the hidden facets of this cosmic giant.
What did the new observations reveal?
The images and spectra recorded by James Webb show:
- An extremely complex web of dense cosmic dust and gas.
- Star-forming nuclei that are in the early stages of their lives.
- Traces of complex organic molecules, which may be related to the origin of the basic ingredients of life.
Sgr B2's thick dust blocks visible light from penetrating, but James Webb, observing in the infrared spectrum, can see through this "fog", recording thermal radiation that reveals hot, newborn stars that had not been detected until now.
See also: James Webb discovered "dark beads" in Saturn's atmosphere
A laboratory of the universe
Scientists consider Sagittarius B2 a natural laboratory, where they study how stars are born and how the first molecules that might lead to more complex forms of matter are formed. Sagittarius B2 also contains molecules such as formaldehyde, ethanol and methanol, suggesting that the basic chemical building blocks for life may be common in such environments.
Why is this discovery important?
James Webb's observations of Sagittarius B2:
- They enhance our understanding of the process of star formation.
- They provide evidence for the origin of organic molecules in space.
- They show that even the darkest regions of the Milky Way can reveal their secrets with the right tools.
See also: James Webb: New discovery shatters planet formation theories
The research community expects these observations to lead to even more discoveries in the near future, as James Webb continues to probe the densest and most mysterious parts of the universe.
