The giant El Gordo galaxy cluster has been used to spot a tiny galaxy beyond it NASA/ESA/J. Jee (Univ. of California, Davis)/J. Hughes (Rutgers Univ.)/F. Menanteau (Rutgers Univ. & Univ. of Illinois/Urbana-Champaign)/C. Sifon (Leiden Obs.)/R. Mandelbum (Carnegie Mellon Univ.)/L. Barrientos (Univ. Catolica de Chile)/K. Ng (Univ. of California, Davis)
The James Webb Space Telescope (JWST) has spotted the smallest galaxy outside our local universe by using the heaviest known cluster of galaxies, called El Gordo, as a giant lens.
El Gordo was first discovered in 2011. Follow-up measurements found it contained so much mass –…
![Webb?s first images of Mars, captured by its NIRCam instrument Sept. 5, 2022 [Guaranteed Time Observation Program 1415]. Left: Reference map of the observed hemisphere of Mars from NASA and the Mars Orbiter Laser Altimeter (MOLA). Top right: NIRCam image showing 2.1-micron (F212 filter) reflected sunlight, revealing surface features such as craters and dust layers. Bottom right: Simultaneous NIRCam image showing ~4.3-micron (F430M filter) emitted light that reveals temperature differences with latitude and time of day, as well as darkening of the Hellas Basin caused by atmospheric effects. The bright yellow area is just at the saturation limit of the detector](https://images.newscientistbeta.com/wp-content/uploads/2022/09/19132953/SEI_126060584.jpg)
