Hubble Captures Majestic Barred Spiral Galaxy UGC 11861

The iconic Hubble Space Telescope has captured a stunning image of the barred spiral galaxy UGC 11861, a relatively unknown celestial object located 69 million light-years away in the constellation Cepheus.

Also known as LEDA 67671, IRAS 21557+7301 or TC 609, UGC 11861 is classified as a barred spiral galaxy with a central boxy structure and two prominent spiral arms. The galaxy is a candidate active galactic nucleus, meaning it harbours a supermassive black hole at its core.

This captivating image reveals UGC 11861's intricate structure, showcasing its active star formation regions as glowing blue patches within its outer arms. These regions are also responsible for the galaxy's history of supernova explosions – three have been observed in and around UGC 11861, in 1995, 1997 and 2011. The first two were classified as Type II supernovae, resulting from the collapse of massive stars reaching the end of their lives.

The Hubble image was assembled using data collected to study Type II supernovae and their surrounding environments. It was created by combining separate exposures taken in the visible and near-infrared regions of the spectrum with Hubble's Advanced Camera for Surveys (ACS). Different hues were assigned to each monochromatic image associated with an individual filter, resulting in the vibrant colour image we see today.

Despite its impressive distance, Hubble's powerful lens has captured UGC 11861's majestic spiral arms and the short but brightly glowing bar at its centre in breathtaking detail. This image serves as a testament to the telescope's enduring legacy in revealing the beauty and complexity of the vast universe.