James Webb pulled off a spectacular trick. The space telescope took a photo of the same galaxy
What is known
At first glance it might seem that James Webbdid something magical, but that kind of thing happens. This happens when the light from an object travels along several paths of different lengths.
The Hubble Space Telescope once sawgalaxy in which a supernova exploded. It is located behind the RX J2129 cluster, which consists of at least 13 galaxies and is 3.2 billion light-years away from us. Due to the uneven distribution of mass, light from objects that are located behind the cluster arrives with a delay.
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That is why when the scientists aimed the lensJames Webb on RX J2129, the space telescope captured three times the same galaxy. In the photo, she appeared at an interval of 320 and 1000 days after the debut appearance.
Scientists now know about the luminosity of a supernova and how it changes over time. This will bring more clarity to the theory about the rate of expansion of our Universe.