SPACE
A new Hubble Space Telescope image shows the tiny galaxy UGC 5189A,located about 150 million light years away in the constellation of Leo, in stunning detail. The space telescope, which has been observing the universe since 1990, has been studying this galaxy since 2010, with scientists using this investigation to learn more about a supernova that occurred in this galaxy over 150 million years ago. Over just three years, this supernova, called SN 2010jl, emitted at least 2.5 billion times more visible energy than the Sun released over the same time frame across all wavelengths.
SN 2010jl is a Type II supernova, meaning that it marks the death of a massive star that during its life would have had a mass of at least 40 to 50 times that of the Sun, These explosions occur when these massive stars have run out of the fuel for nuclear fusion, and the energy that for millions or billions of years supports them against the inward push of gravity ceases.
While studying supernovae themselves is of immense value to scientists, examining the wreckage that these cosmic explosions leave behind can be equally fruitful. For example, studying the environments around detonated stars can show the conditions needed to drive a supernova and how that supernova changes its surroundings. This interest means Hubble has found itself directed at UGC 5189A many times. This new picture is created from data collected during the long-serving space telescope’s last three observation periods of the distant galaxy, which is just 36,000 light years across, making it diminutive compared to our 100,000-lightyear-wide galaxy, the Milky Way.
The image shows UGC 5189A as a flat, somewhat misshapen disc with a warped upward curve. The right-hand side of the galaxy is marked by ‘blue fizz’ that represents plumes of bright gas and dust. The left side of UGC 5189A is less dramatic and striking, slightly dimmer with patchier coverings of gas and dust. Outside the main bright disc of the galaxy, a dark coffee-coloured trail of gas underlines UGC 5189A and leads up away to the top left-hand corner of the image. While the background of the galaxy is mostly dark, a few small galaxies can be seen punctuating the inky blackness, and one star is clearly visible in the top right-hand c
