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- Otto Posterman
- Posts: 5219
- Joined: Fri Dec 04, 2009 3:27 am
Sh2-239: Celestial Impasto
The cosmic brush
of star formation composed this alluring mix
of dust and dark nebulae. Cataloged as Sh2-239 and LDN 1551, the region
lies near the southern end of the Taurus molecular cloud
complex some 450 light-years distant. Stretching for nearly 3 light-years, the canvas abounds with signs of embedded young stellar objects driving dynamic outflows into the surrounding medium. Included near the center of the frame, a compact, tell-tale red jet of shocked hydrogen gas is near the position of infrared source IRS5, known to be a system of protostars surrounded
by dust disks. Just below it are the broader, brighter wings of HH 102, one of the region's
many Herbig-Haro objects, nebulosities associated with newly born stars
. Estimates indicate that the star forming LDN 1551 region
contains a total amount of material equivalent to about 50 times the mass of the Sun.
- 4725 Å
- Posts: 13086
- Joined: Sat May 29, 2010 5:33 am
This is a very beautiful image by master astrophotographer Adam Block. Congratulations, Adam!
I'll quote myself and repeat what I said in another forum here:
Adam Block, your image is great as usual. It brings out incredible turmoil in this star formation region. We can see veritable "tornadoes" of dust as well as ionized pink blotches, dots and intricate structures of ionized gas, as well as the large black "back" of the cloud that got concentrated enough to be able to trigger star formation in its "stomach".
Again, congratulations, Adam! You richly deserve this!
- Posts: 8200
- Joined: Wed Jul 27, 2005 3:41 pm
- Location: Nebraska
Neat picture; makes a great background!
Smile today; tomorrow's another day!
- Vacationer at Tralfamadore
- Posts: 18805
- Joined: Mon Jan 21, 2008 1:57 pm
- Location: Alexandria, Virginia
<<In English, the borrowed Italian word impasto most commonly refers to a technique used in painting, where paint is laid on an area of the surface (or the entire canvas) very thickly, usually thickly enough that the brush or painting-knife strokes are visible. Paint can also be mixed right on the canvas. When dry, impasto provides texture, the paint appears to be coming out of the canvas.
The word "impasto" is Italian in origin; in that language it means "dough" or "mixture"; the verb "impastare" translates variously as "to knead", or "to paste". Italian usage of "impasto" includes both a painting and a potting technique. The root noun of impasto is pasta
, whose primary meaning in Italian is paste.
Oil paint is most suitable to the impasto painting technique, due to its thickness and slow drying time. Acrylic paint can also be impastoed. Impasto is generally not possible in watercolour or tempera without the addition of thickening agent due to the inherent thinness of these media.
Impastoed paint serves several purposes. First, it makes the light reflect in a particular way, giving the artist additional control over the play of light on the painting. Second, it can add expressiveness to the painting, the viewer being able to notice the strength and speed applied by the artist. Third, impasto can push a painting into a three dimensional sculptural rendering. The first objective was originally sought by masters such as Rembrandt and Titian, to represent folds in clothes or jewels: it was then juxtaposed with more delicate painting. Much later, the French impressionists created entire canvases of rich impasto textures. Vincent van Gogh used it frequently for aesthetics and expression. Abstract expressionists such as Hans Hofmann and Willem De Kooning also made extensive use of it, motivated in part by a desire to create paintings which dramatically record the "action" of painting itself. Still more recently, Frank Auerbach has used such heavy impasto that some of his paintings become almost three-dimensional.>>
- Science Officer
- Posts: 289
- Joined: Mon Oct 03, 2011 1:57 am
- Location: Heart of America
It looks like an underwater scene to me.
The following statement is true.
The above statement is false.
this image is very interesting.
The Universe is a " artist " very good
Lovely photo. Being a neophyte; mouse over names on the APOD photos would be very helpful.