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The structure of the universe

Perseus galaxy cluster. The image, taken by the Euclid satellite, shows the Perseus galaxy cluster illuminated by the soft blue light emitted by orphan stars. These stars are scattered throughout the cluster, and reach a distance of 2 million light years from its center. The cluster galaxies stand out in illuminated elliptical shapes against the dark space. Credit: ESA/Euclid/Euclid Consortium/NASA, Image processing: M. Montes (IAC) and J.-C. Cuillandre (CEA Paris-Saclay).

The Euclid mission reveals 1.5 trillion orphan stars cruising through space

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The Perseus cluster is among the most massive structures in the universe, containing thousands of galaxies and located about 240 million light years from Earth. Within this vast expanse, the Euclid satellite detected faint and ghostly lights - the orphan stars
long image captionThis is part of the Evolution of the Universe Early Science Survey (CEERS), consisting of several near-infrared points from the NIRCam (Near Infrared Camera) camera on the James Webb Space Telescope. These observations are being made in the same region studied by the Hubble Space Telescope, known as the Extended Groth Belt. Arrows showing the directions north and east show the direction of the image in the sky. It should be noted that the relationship between north and east in the sky (as seen from below) is reversed compared to the half directions on the map of the earth (as seen from above). The image shows invisible near-infrared wavelengths converted to visible colors. The color key shows which NIRCam filters were used to collect the light. The name color of each filter is the visible color that represents the infrared light passing through that filter. The barrel ruler is marked with arc-seconds which are a measure of angular distance in the sky. One arc-second is equal to an angular measurement of 1/3600 of one degree. There are 60 arc-minutes in a degree and 60 arc-seconds in an arc-minute. (The full moon has an angular diameter of about 30 arc-minutes.) The actual size of an object that covers one arc-second in the sky depends on its distance from the telescope. Credit: NASA, European Space Agency (ESA), Canadian Space Agency (CSA), Space Telescope Science Institute (STScI), Steve Finkelstein (University of Texas at Austin)

The James Webb telescope reveals: galaxies in the early universe have a long and flat shape

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The first galaxies were much less developed than the spiral and spherical galaxies that exist today, which are actually the result of mergers, both because of the stage of development but also because of the conditions that prevailed at the time
Laniakia supercluster. Source: R. Brent Tully et al, The Laniakea supercluster of galaxies, Nature 513, 2014.

Laniakia: Our exact address in the universe

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From the galaxy research of Prof. Yehuda Hoffman from the Hebrew University

The study of galaxies by an Israeli researcher - the most viewed video in the history of "Nature" (video)

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Landmarks in the expansion of the universe. From Wikipedia

Scientists: The speed of light is not constant. Vacuum particles cause fluctuations in the speed of light

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multiverse From Wikipedia

The possibility of life in the multiverse

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Excerpt from the logo of the science site. PR photo

Theory: the universe is like football - and it is finite

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