Pan of Spiral Galaxy NGC 1559 in Reticulum | Hubble Space Telescope
New stars forming in a molecular cloud, made mostly of hydrogen gas, emit copious amounts of ultraviolet light that is absorbed by the cloud. This becomes ionized causing it to glow with H-alpha light. Therefore, filtering to detect only this light provides a reliable means to detect areas of star formation (called H II regions), shown in this image by bright red and pink colors of the blossoming patches filling NGC 1559’s spiral arms.
These ten images come from six different observing programs with Hubble, running from 2009 all the way up to the present year. These programs were led by teams of astronomers studying ionized gas and star formation, following up on a supernova, and tracking variable stars as a contribution to calculating the Hubble constant.
Image Description: A spiral galaxy, tilted at an angle, with irregularly-shaped arms. It appears large and close-up. The center glows in a yellowish color, while the disc around it is a bluer color, due to light from older and newer stars. Dark reddish threads of dust cover the galaxy, and there are many large, shining pink spots in the disc where stars are forming.
Credit: ESA/Hubble & NASA, F. Belfiore, W. Yuan, J. Lee and the PHANGS-HST Team, A. Riess, K. Takáts, D. de Martin & M. Zamani (ESA/Hubble), N. Bartmann (ESA/Hubble)
Duration: 30 seconds
Release Date: Sept. 16, 2024
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