James Webb teleskop

izjemno odkritje

Astronomi z vesoljskim teleskopom James Webb odkrili povsem nov astronomski objekt

Umetniška upodobitev plesa med zvezdo in planetom. / Foto: Esa

ASTRONOMIJA

Smrtonosni ples: vesoljski teleskop posnel planet, ki ga zvezda trga na kose

Soon after the start of the NASA/ESA/CSA James Webb Space Telescope's science operations, astronomers noticed something unexpected in the data: red objects that appear small on the sky, located in the distant, young universe. Come to be known as "little red dots" (LRDs), this intriguing class of objects is not well understood at present, sparking new questions and prompting new theories about the processes that occurred in the early universe. A team of astronomers sifted through James Webb Space Telescope data from multiple surveys to compile one of the largest samples of "little red dots" (LRDs) to date. The team started with the Cosmic Evolution Early Release Science (CEERS) survey before widening their scope to other extragalactic legacy fields, including the JWST Advanced Deep Extragalactic Survey (JADES) and the Next Generation Deep Extragalactic Exploratory Public (NGDEEP) survey. From their sample, they found that these mysterious red objects that appear small on the sky emerge in large numbers around 600 million years after the big bang and undergo a rapid decline in quantity around 1.5 billion years after the big bang. Spectroscopic data of some of the LRDs in their sample, provided by the Red Unknowns: Bright Infrared Extragalactic Survey (RUBIES), suggests that many are accreting black holes. However, further study of these intriguing objects is required. [Image description: Six Webb images of little red dots are combined in a two-row mosaic. Each little red dot is centered within a square frame and lies against the black background of space. Each dot has a yellow-white circular core surrounded by a red, fuzzy ring. White text in the top left corner of each box lists the source's name from the Webb surveys, and its redshift. From left to right, the top row reads CEERS 14448, z = 4.75; NGDEEP 4321, z = 8.92; and PRIMER-COS 10539, z = 7.48. The bottom row reads CEERS 20320, z = 5.27; JADES 9186, z = 4.99; and PRIMER-UDS 17818, z = 6.40.]

Vesolje

Astrofiziki z ljubljanske fakultete odkrili supermasivno črno luknjo

Po vsem vesolju so razmetane planeti, na katerih se je lahko začelo življenje. / Foto: Istock

možnost življenja

Revolucionarni trenutek: toda ali so res odkrili bitja na drugem planetu?

The first full-color image from NASA's James Webb Space Telescope, a revolutionary apparatus designed to peer through the cosmos to the dawn of the universe, shows the galaxy cluster SMACS 0723, known as Webb's First Deep Field, in a composite made from images at different wavelengths taken with a Near-Infrared Camera and released July 11, 2022. NASA, ESA, CSA, STScI, Webb ERO Production Team/Handout via REUTERS THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. TPX IMAGES OF THE DAY

Online

Z vesoljskim teleskopom James Webb odkrili doslej najbolj oddaljene kroglaste zvezdne kopice