Galaxies · ESA/Hubble Picture of the Week
Faint Remnant Threads
December 21, 2020 · ESA/Hubble · NGC 1947 · Dorado
Zoom to full resolution See where it is in the 3D sky Original on ESA/Hubble ↗
This unusual lenticular galaxy, known as NGC 1947, has lost almost all the gas and dust from its signature spiral arms , which used to orbit around its centre. Discovered almost 200 years ago by James Dunlop, a Scottish-born astronomer who later studied the sky from Australia, NGC 1947 can only be seen from the southern hemisphere, in the constellation Dorado (The Dolphinfish).
Residing around 40 million light-years away from Earth, this galaxy shows off its structure by backlighting its remaining faint gas and dust disc with millions of stars. In this picture, taken with the NASA/ESA Hubble Space Telescope , the faint remnants of the galaxy’s spiral arms can still be made out in the stretched thin threads of dark gas encircling it. Without most of its star-forming material, it is unlikely that many new stars will be born within NGC 1947, leaving this galaxy to continue fading with time.