In the center of this image, taken with the NASA/ESA Hubble Space Telescope, is the galaxy cluster SDSS J1038+4849 — and it seems to be smiling.

You can make out its two orange eyes and white button nose. In the case of this “happy face”, the two eyes are very bright galaxies and the misleading smile lines are actually arcs caused by an effect known as strong gravitational lensing.

Galaxy clusters are the most massive structures in the Universe and exert such a powerful gravitational pull that they warp the spacetime around them and act as cosmic lenses which can magnify, distort and bend the light behind them. This phenomenon, crucial to many of Hubble’s discoveries, can be explained by Einstein’s theory of general relativity.

In this special case of gravitational lensing, a ring — known as an Einstein Ring — is produced from this bending of light, a consequence of the exact and symmetrical alignment of the source, lens and observer and resulting in the ring-like structure we see here.

Hubble has provided astronomers with the tools to probe these massive galaxies and model their lensing effects, allowing us to peer further into the early Universe than ever before. This object was studied by Hubble’s Wide Field and Planetary Camera 2 (WFPC2) and Wide Field Camera 3 (WFC3) as part of a survey of strong lenses.

A version of this image was entered into the Hubble’s Hidden Treasures image processing competition by contestant Judy Schmidt.


ASPEN :: 4300-6163-4849 :: @uchibambi

today i took a trip to the lovely wintery town of aspen! i can only assume the dream address is still a work in progress but from what i saw, it’s beautiful regardless. as of right now, there are no hacks to be seen, but it still makes for a fun and very calming trip as well as giving me a big of inspiration! with lots of little presents scattered throughout, aspen is a town you won’t want to miss!

Smiley face galaxy cluster spotted by Hubble Telescope

The Hubble space telescope snapped this picture of SDSS J1038+4849, a galaxy cluster that’s quite distant to the Earth. The two eyes are made of very bright galaxies, and the smile lines are caused by strong gravitational lensing that creates an arc-like effect.