LÄNGRE OCH LÄNGRE BORT

***

Ungefär som väntat tillhandahåller JWST inte bara svar utan dom nya bilderna ställer frågor och ifrågasätter en del existerande uppfattningar. Följande är ett klipp från Washington Post för knappt en vecka sen:

The James Webb Space Telescope, performing splendidly as it examines the universe, has got astronomers scratching their heads. The very distant universe looks a little different than expected.

The telescope, launched eight months ago and orbiting the sun about a million miles from Earth, has been capturing images of extremely faint galaxies that emitted their light in the first billion years or so after the big bang. Observing these “early” galaxies is one of the main missions of the telescope — to see deeper into space, and further back in time, than any previous telescope.

The first scientific results have emerged in recent weeks, and what the telescope has seen in deepest space is a little puzzling. Some of those distant galaxies are strikingly massive. A general assumption had been that early galaxies — which formed not long after the first stars ignited — would be relatively small and misshapen. Instead, some of them are big, bright and nicely structured.

Webb telescope is astonishing. But the universe is even more so.

“The models just don’t predict this,” Garth Illingworth, an astronomer at the University of California at Santa Cruz, said of the massive early galaxies. “How do you do this in the universe at such an early time? How do you form so many stars so quickly?”

The very distant universe artikeln talar om visar objekt mindre än en milliard år efter Big Bang, dvs 13-13,5 milliarder ljusår bort. Ytterligare en kommentar är att rödförskjutning inte bara tycks bero på hastigheten bort, sannolikt färgas avlägsna galaxer rött också av stoft i rymden, och det väcker ju många frågor hos mig.

***

Inlagt 2022-08-31 16:12 | Läst 1534 ggr. | Permalink

2022-08-31 16:49 Vibybo

Ja Björn, föga vet vi. Nya vetenskapliga upptäckter kullkastar ibland gamla, och så håller det på så länge forskningen är fri.

Besvara

2022-08-31 17:25 pdahlen

Kan förstå att de också kliar sina huvuden, jag är inne på samma linje att hur mer jag sätter mig in i rymden desto mindre känns det som man förstår

Besvara

Bloggar

LÄNGRE OCH LÄNGRE BORT

The James Webb Space Telescope, performing splendidly as it examines the universe, has got astronomers scratching their heads. The very distant universe looks a little different than expected.

Webb telescope is astonishing. But the universe is even more so.

“The models just don’t predict this,” Garth Illingworth, an astronomer at the University of California at Santa Cruz, said of the massive early galaxies. “How do you do this in the universe at such an early time? How do you form so many stars so quickly?”

Khalad

Skriver om

Innehållskategorier

Arkiv

Bloggar

LÄNGRE OCH LÄNGRE BORT

The James Webb Space Telescope, performing splendidly as it examines the universe, has got astronomers scratching their heads. The very distant universe looks a little different than expected.

Webb telescope is astonishing. But the universe is even more so.

“The models just don’t predict this,” Garth Illingworth, an astronomer at the University of California at Santa Cruz, said of the massive early galaxies. “How do you do this in the universe at such an early time? How do you form so many stars so quickly?”

Khalad

Skriver om

Innehållskategorier

Arkiv

Kategorier