This is an interesting APOD. I assume that the red background is hydrogen alpha, brought out by an Hα filter.
Obviously the fascinating aspect of this APOD is how it shows us a long tendril of dust (actually, it is mostly gas, mixed with dust), which ends in a region of star formation.
This is not unheard of. Gas and dust very often form elongated dark structures in the Milky Way, perhaps because of our galaxy's rotation. Or has it something to do with magnetic field lines?
Star formation is by no means rampant in the Milky Way, and many, many dust structures are "sterile". But some long dust lanes do form stars at one end:
A wide field image brings out the true size of the dust structure in Corona Australis.
Note the two tiny blue blobs at the lower end of it (just above center right).
Photo: Fernando de Menenez.
And what is the Antares and Rho Ophiuchi region, if not (massive) star formation at the end of a long dust lane? Another long dust lane has ended in the Blue Horse region and the "claws" of Scorpius (or whatever Beta, Delta, Pi and maybe Rho Scorpius are collectively called).
Scorpius is the constellation where we find Antares, but it is also home of the False Comet. And the "comet head" of the False Comet, the hot stars of NGC 6231, is in the process of compressing gas in a nearby cometary globule, an elongated dust structure with star formation at the end closest to the bright cluster. The cometary globule in question is known as the Dark Tower.
The False Comet in Scorpius. Bright cluster NGC 6231
is connected to red emission nebula NGC 4628
by a thin line of stars. Photo: Michael Stecker.
Cluster NGC 6231 (lower left) and starforming cometary globule, the Dark Tower,
at right. Photo: Gerald Rhemann.
In the cometary globule known as the Dark Tower, we can see how harsh ultraviolet radiation and stellar winds from massive cluster NGC 6231 have sculpted and compressed a thick strand of gas and made it form stars at the end closest to the brilliant cluster. Maybe something at least slightly similar has happened in other places where stars have formed at one end of a long dust lane.
You do not have the required permissions to view the files attached to this post.