Astronomy Picture of the Day

APOD: 2023 January 18 MACS0647: Gravitational Lensing of the Early Universe by Webb
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APOD: 2023 January 18  MACS0647: Gravitational Lensing of the Early Universe by Webb
Credit & Copyright: NASA, ESA, CSA, Dan Coe (STScI), Rebecca Larson (UT), Yu-Yang Hsiao (JHU); Processing: Alyssa Pagan (STScI); Text: Michael Rutkowski (Minn. St. U. Mankato)
Explanation: Gravitational lensing by the galaxy cluster MACS0647 -- in which the massive foreground cluster distorts and lenses the light emitted by distant background galaxies along the line of sight is on vivid display here in this recent multi-color infrared image from the James Webb Space Telescope (JWST). In particular, the background source MACS0647-JD is seen to be lensed three times by the cluster. When first discovered with the Hubble Space Telescope, MACS0647-JD was observed as an amorphous blob. With Webb though, this single source is revealed to be a pair or small group of galaxies. The colors of the MACS0647-JD objects are different as well -- indicating differences potentially in the age or dust content of these galaxies. These new images provide rare examples of galaxies in an era only a few 100 million years after the Big Bang.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
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Based on Astronomy Picture Of the Day

Publications with keywords: gravitational lens
Publications with words: gravitational lens
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