Thursday, March 15, 2018

Across The Universe - Arcs, Jets, and Shocks near NGC 1999

Arcs, Jets, and Shocks near NGC 1999:

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2018 March 7




See Explanation. Moving the cursor over the image will bring up an annotated version. Clicking on the image will bring up the highest resolution version available.


Arcs, Jets, and Shocks near NGC 1999

Image Credit & Copyright:
Mark Hanson;
Annotation: Sakib Rasool
(StarSurfin)


Explanation:
This tantalizing array of nebulas and stars can be found
about two degrees south of the famous
star-forming Orion Nebula.

The
region abounds
with energetic young stars producing jets and
outflows that push through the surrounding
material at speeds of hundreds of kilometers per second.

The interaction creates luminous shock
waves known as
Herbig-Haro (HH) objects.

For example, the graceful, flowing arc just right of center
is cataloged as
HH 222, also called the
Waterfall Nebula.

Seen below the Waterfall, HH 401 has a distinctive cone shape.

The bright bluish nebula below and left of center
is NGC 1999, a dusty cloud reflecting
light from an embedded variable star.

The entire cosmic vista spans over 30 light-years, near the edge of the
Orion Molecular Cloud
Complex
some 1,500 light-years distant.




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