To emphasize: this is a young star with a pre-planetary disk.

To emphasize: this is a young star with a pre-planetary disk. Doesn’t it look just like a spiral galaxy? I don’t understand at all how arms could form like this — I would not think that spiral density waves would occur in a gas/dust disk — so I need to do more reading to see what astronomers think could cause it. Maybe it’s just a transient state? Or maybe it just resembles like a spiral?

Here’s a better article on the topic: https://astronomynow.com/2016/10/01/protoplanetary-discs-spiral-arms-embrace-young-star/

Friends of NASA I wish you would include more links in your posts instead of just hashtags.

Originally shared by Friends of NASA

Spirals with a Tale to Tell | ESO

This beautiful image, captured with the Atacama Large Millimeter/submillimeter Array (ALMA) features a protoplanetary disc surrounding the young star Elias 2-27, some 450 light years away. ALMA has discovered and observed plenty of protoplanetary discs, but this disc is special as it shows two distinct spiral arms, almost like a tiny version of a spiral galaxy.

Previously, astronomers noted compelling spiral features on the surfaces of protoplanetary discs, but it was unknown if these same spiral patterns also emerged deep within the disc where planet formation takes place. ALMA, for the first time, was able to peer deep into the mid-plane of a disk and discovered the clear signature of spiral density waves.

Nearest to the star, ALMA found a flat disc of dust, which extends to what would approximately be the orbit of Neptune in our own Solar System. Beyond that point, in the region analogous to our Kuiper Belt, ALMA detected a narrow band with significantly less dust, which may be an indication for planet in formation. Springing from the outer edge of this gap are the two sweeping spiral arms that extend more than 10 billion kilometers away from their host star. The discovery of spiral waves at these extreme distances may have implications on the theory of planet formation.

Credit: B. Saxton (NRAO/AUI/NSF); ALMA (ESO/NAOJ/NRAO)

Release Date: October 3, 2016

European Southern Observatory (ESO) 

#ESO #Astronomy #Space #Science #Galaxy #Star #Elias227 #ProtoplanetaryDisc #Cosmos #Universe #Earth #Chile #ALMA #Atacama #Desert #STEM #Education

6 replies on “To emphasize: this is a young star with a pre-planetary disk.”

  1. I believe the “bang” at the stars creation, blasts dust and debris straight out for millions of miles on both sides of the initial event, and as the gasses start to turn, and rotate & spin, and become more solid and stable, the original “arms” follow the spin of the infant star, and “twist” into the spiral observed…..

    Isn’t that what made our spiral galaxy? I guess no one on here, has been around long enough to have observed our galaxies formation from the start, so they can share what they witnessed, huh? If so, please tell us, ok?

  2. Mary Skinner How does being Christian affect your understanding of science? I challenge you to quote anything Christ said on the subject. If you”re referring to the old testatment, that part of the bible had quite a lot that was disputed by Christ. ( the San hedron called him a heretic for that) ” It is WRITTEN, an eye for an eye, and a tooth for a tooth, but I say, turn the other cheek”) Christians tend to go off the rails when they become obsessed with the old testament.

  3. Glenn Steely that’s an interesting theory, thanks for the comment. I think it’s not right, though, because astronomers are pretty sure the disk comes first because they’ve found disks before the stars finish forming. New stars don’t start with a bang (well, I’ve never heard of one starting violently at least and my PhD was on young stars).

    But your idea does make me wonder if there’s additionally gas infall into the disk happening at a later date. So, imagine a disk with a protostar and the star starts clearing its region with stellar wind but then another infall episode begins into the cleared area. Dunno if that’s realistic or not

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