The gravitational field surrounding this massive cluster of galaxies, Abell 68, acts as a natural lens in space to brighten and magnify the light coming from very distant background galaxies. Like a fun-house mirror, lensing creates a fantasy landscape of arc-like images and mirror images of background galaxies. The foreground cluster is 2 billion light-years away, and the lensed images come from galaxies far behind it.
Annotations:
1 and 2: This galaxy is visible twice, because its light has followed two separate paths around an elliptical galaxy before reaching us. The image marked 2 is heavily distorted into what looks like the shape of a simulated alien from the 1970s video game Space Invaders.
3: This galaxy appears to have purple liquid dripping from it. The "droplets" are gas clouds within the galaxy that are being stripped out and heated up as the galaxy passes through a region of denser intergalactic gas. This phenomenon is called ram-pressure stripping.
4: The series of long, light streaks here are background galaxies, the images of which have been heavily distorted by the lensing effects of the cluster in the foreground.
Credits
NASA and ESA| About The Object | |
|---|---|
| Object Name | Abell 68 |
| Object Description | Galaxy Cluster |
| R.A. Position | 00h 36m 59.4s |
| Dec. Position | 09° 8' 30.05" |
| Constellation | Vulpecula |
| Distance | 2.1 billion light-years (644 million parsecs) |
| About The Data | |
| Data Description | The image was created from Hubble data from proposal : J.P. Kneib (Laboratoire d'Astrophysique de Marseille) and collaborators. |
| Instrument | HST>ACS/WFC and HST>WFC3/IR |
| Exposure Dates | October 18, 2010 and November 14, 2010 |
| Filters | WFC3/UVIS: F814W (I) WFC3/IR: F110W (YJ) and F160W (H) |
| About The Image | |
| Color Info | This image is a composite of separate exposures acquired by the ACS and WFC3 instruments. Several filters were used to sample various wavelengths. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are: Blue: F814W (I) Green: F110W (YJ) Red: F160W (H) |
| Compass Image |  |
| About The Object | |
|---|---|
| Object Name | A name or catalog number that astronomers use to identify an astronomical object. |
| Object Description | The type of astronomical object. |
| R.A. Position | Right ascension – analogous to longitude – is one component of an object's position. |
| Dec. Position | Declination – analogous to latitude – is one component of an object's position. |
| Constellation | One of 88 recognized regions of the celestial sphere in which the object appears. |
| Distance | The physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs. |
| Dimensions | The physical size of the object or the apparent angle it subtends on the sky. |
| About The Data | |
| Data Description |
|
| Instrument | The science instrument used to produce the data. |
| Exposure Dates | The date(s) that the telescope made its observations and the total exposure time. |
| Filters | The camera filters that were used in the science observations. |
| About The Image | |
| Image Credit | The primary individuals and institutions responsible for the content. |
| Publication Date | The date and time the release content became public. |
| Color Info | A brief description of the methods used to convert telescope data into the color image being presented. |
| Orientation | The rotation of the image on the sky with respect to the north pole of the celestial sphere. |
