Morning.

Here it is, several thousand years in the making: the protostellar jet HH212 as seen in the infrared by #JWST.

We discovered this jet in 1993, glowing in the light of shocked molecular hydrogen at 2.12 microns, as gas emerges symmetrically at about 100 km/s from the two poles of a young protostar not far from the Horsehead Nebula in Orion.

Our new JWST image spans six wavelengths & is ten times sharper than any previous infrared image.

#Astronomy #SpaceScience #Astrodon

1/

@markmccaughrean
What is this object in the image with the distinct symmetric "shadow" on two sides and a red line of gas/dust that curves almost 180 degrees?
Is it a protoplanetary disk?
Or some artifact due to gas/dust in the line of sight?
Or something else?

@AkaSci It’s a bipolar reflection nebula & yes, I’d say that it’s illuminated by a central protostar embedded in a disk.

What’s weird is that the star in the middle is visible: normally with edge-on disks the midplane extinction is so high, you can’t see the central source in the near-IR.

It could just be a chance superposition, but it’s reddened & that even weirder red line of H2 makes me wonder. We have no idea what that is at the moment: it’s bizarre.

@AkaSci There’s no clear evidence for a protostar there though, while the brighter object nearby with the wisp of nebulosity is clearly seen in dust continuum by Herschel so is a protostar.