The Final Frontier
Solar eclipse, as seen from Earth’s orbit
The Outer Shells of Centaurus A. Faint shells around galaxies are not unusual and considered by themselves as evidence of a previous galaxy merger, analogous to water ripples on a pond. An unexpected attribute of these shells is the abundance of gas, which should become separated from existing stars during the collision.
The Outer Shells of Centaurus A (July 1 2012) Image Credit: E. Peng and H. Ford (JHU), K. Freeman (ANU), R. White (STScI), CTIO, NOAO, NSF What causes the surrounding shells in peculiar galaxy Cen A? In 2002 a fascinating image of peculiar galaxy Centaurus A was released, processed to highlight a faint blue arc indicating an ongoing collision with a smaller galaxy. Another interesting feature of Cen A, however, is the surrounding system of shells, better visible here (...) #astronomy #space
a photograph of a star forming -- courtesy of Hubble
This WISE image shows the Berkeley 59 cluster of stars, which are relative babies at just a few million years old, and resemble a cosmic rose
Hoag's Object by NASA: This non-typical galaxy is known as a ring galaxy, and was discovered in 1950 by astronomer Art Hoag, who initially thought it to be a planetary nebula. Serendipitously, from the perspective of our solar system what appears to be an even more distant ring galaxy is plainly visible within the gap between this galaxy's central body of mostly yellow stars and the outer ring of blue stars. via wikipedia. #Ring_Galaxy #Hogs_Object #Astronomy
Hoag's Object: A Strange Ring Galaxy. Explanation: Is this one galaxy or two? This question came to light in 1950 when astronomer Art Hoag chanced upon this unusual extragalactic object. On the outside is a ring dominated by bright blue stars, while near the center lies a ball of much redder stars that are likely much older. Between the two is a gap that appears almost completely dark. How Hoag's Object formed remains unknown, although similar objects have now been identified and collectively...
A stellar nursery in the Cygnus X star forming region
Solar flare on January 23rd, 2012.
An aurora borealis seen from the International Space Station