Vly News - Professional news Platform

Researchers have just studied the oldest lensing of light we can see and found the oldest dark matter ever observed, around a galaxy 12 billion years old. They spotted this dark matter by looking at how some galaxies bend the cosmic microwave background light, the earliest detectable radiation after the Big Bang, that rocked the universe as we know it. The team’s research is published in Physical Review Letters. “Most researchers use source galaxies to measure the distribution of dark matter from now to eight billion years ago,” said Yuichi Harikane, astronomer at the Institute for Cosmic Ray Research at the University of Tokyo and co-author of a recent paper, in a Nagoya University release. . “However, we were able to look further into the past because we used the CMB further afield to measure dark matter. For the first time, we’re measuring dark matter almost from the early days of the universe.” Dark matter makes up about 27% of the universe, although we cannot detect it directly

The stars in new images from the James Webb Space Telescope look sharper than ever before. And I’m not just talking about the image quality, which is amazing. I talk about the fact that many of the bright stars in the picture have very different nails from the Christmas decorations or, as one of my colleagues put it, “This looks like a JJ Abrams promo poster, and I love it. ” But this is not a case of too much lens flare. Those are diffraction spikes, and if you look closely, you’ll see that all the bright objects in the JWST image have the same eight-pointed pattern. The brighter the light, the more prominent the features. Dimmer objects such as nebulae or galaxies are less likely to see this distortion. This diffraction spike pattern is unique to JWST. If you compare the images taken by the new telescope with the images taken by its predecessors, you will see that Hubble only has four diffraction spikes for the eight JWSTs. (Two JWST spikes can be very dim, so sometimes it ap