Galaxy Cluster Abell 1689
Image by NASA Goddard Photo and Video
Image release August 19, 2010
An international team of astronomers using gravitational lensing observations from the NASA/ESA Hubble Space Telescope has taken an important step forward in the quest to solve the riddle of dark energy, a phenomenon which mysteriously appears to power the Universe’s accelerating expansion. Their results appear in the 20 August 2010 issue of the journal Science.
This image shows the galaxy cluster Abell 1689, with the mass distribution of the dark matter in the gravitational lens overlaid (in purple). The mass in this lens is made up partly of normal (baryonic) matter and partly of dark matter. Distorted galaxies are clearly visible around the edges of the gravitational lens. The appearance of these distorted galaxies depends on the distribution of matter in the lens and on the relative geometry of the lens and the distant galaxies, as well as on the effect of dark energy on the geometry of the Universe.
Credit: NASA, ESA, E. Jullo (JPL/LAM), P. Natarajan (Yale) and J-P. Kneib (LAM).
To view a video of this image go to: www.flickr.com/photos/gsfc/4909967467
NASA Goddard Space Flight Center is home to the nation’s largest organization of combined scientists, engineers and technologists that build spacecraft, instruments and new technology to study the Earth, the sun, our solar system, and the universe.
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To read more go to: www.spacetelescope.org/news/heic1014/?utm_source=feedburn…
When will the Galaxy Note come to Verizon?
I have heard rumor of the Note being renamed the Galaxy Journal with a slightly larger processor. ANy truth to this rumor? A 5.3 inch phone/tablet is exactly what I want!
Galaxy Journal best answer:
Answer by zbalat
It looks like it is going to be available from both Sprint and Verizon.
Sprint had a picture of what looks like the Note (Journal) on their website but took it down.
Stephan’s Quintet: Intruder Galaxy! (NASA, Chandra, 05/08/03)
Image by NASA’s Marshall Space Flight Center
Editor’s Note: Chandra is celebrating 10 years of operation. This lovely blue "intruder" is from 2003.
The hurly-burly interactions in the compact group of galaxies known as Stephan’s Quintet are shown in the upper left where a Chandra X-ray Observatory image (blue) is superimposed on a Digitized Sky Survey optical image (yellow). Shock-heated gas, visible only with an X-ray telescope, appears as a bright blue cloud oriented vertically in the middle of the image and has a temperature of about 6 million degrees Celsius. The heating is produced by the rapid motion of a spiral galaxy intruder located immediately to the right of the shock wave in the center of the image (galaxy labeled B in the wide field optical image on the lower right).
Stephan’s Quintet is an excellent example of the tumultuous dynamics of a compact group. The motion of the galaxies through the hot gas, and the gravitational pull of nearby galaxies are stripping cool gas from the galaxies, thereby depriving them of the raw material from which to form new stars. In a few billion years the spiral galaxies in Stephan’s Quintet will likely be transformed into elliptical galaxies.
During the past few billion years additional gas may have been stripped from the galaxies in the group and heated by collisions such as the one seen in these images. An intruder that may have passed through the center of the group at least twice is the faint galaxy C seen in the wide field optical image. The fainter blue cloud in the X-ray/optical image may be a relic of past collisions.
The four galaxies A, B, D and E strung out diagonally across the wide field optical image are at a distance of about 280 million light years from Earth. The large-appearing galaxy F in the lower left of this image has now been identified as a foreground galaxy at a distance of about 35 million light years, leaving the group originally identified as Stephan’s Quintet with only a quartet of galaxies. However, if we include galaxy C, which is at the same distance as the other four galaxies, it becomes a quintet again!
Ginevra Trinchieri of the INAF-Brera Observatory in Milan, Italy, Jack Sulentic of the University of Alabama in Tuscaloosa, and Dieter Brietschwerdt and Wolfgang Pietsch of the Max-Planck Institute for Extraterrestrial Physics in Garching, Germany are co-authors of a paper that describes the Chandra data on Stephan’s Quintet. The paper appeared in the journal Astronomy & Astrophysics.
Image credit: X-ray: NASA/CXC/INAF-Brera/G.Trinchieri et al.; Optical: Pal.Obs. DSS
Read more about this image: www.chandra.harvard.edu/photo/2003/stephan/
Read more about Chandra: www.nasa.gov/chandra
p.s. You can see all of our Chandra photos in the Chandra Group in Flickr at: www.flickr.com/groups/chandranasa/ We’d love to have you as a member!
You can tell I named these before breakfast, lol!
Got lemons, make lemonade. Got marker bleedthru, make bleedthrumanade.
Ingredients: zentangle, Letraset Promarkers, Pentel Sunburst White Gel Pen, & a Faber-Castell Big Brush, all stirred gently in a Paperblanks journal.