#redshift

[hiadammarshall]

Tumbling

hiadammarshall.com / Instagram

[pi-slices]

Glass Waves.

[njere]

summer sky ☀️

[thefirststarr]

The James Webb Space Telescope is helping us look further and further into the universe than we ever did before.

Pictured above, is now confirmed to be the most distant galaxy ever known. MoM-z14, standing for Mirage or Miracle, is emitting light that comes from 280 million years after the Big Bang.

It was discovered that MoM-z14 has more nitrogen than thought to be possible by that time in the universe, suggesting that conditions might have been different from what has been theorized.

Due to the expansion of the universe, it is difficult to find these old galaxies. Their light is being stretched into longer wavelengths, making them appear redder. Following their discoveries, the MoM objects must be followed up with a spectrograph to confirm how much the light has been shifted. This process provides value as to how far away they really are.

Image Credit & Copyright: NASA, ESA, CSA, STScl, R. Naidu (MIT), Image Processing: J. DePasquale (STScl)

[strawberryartgallery]

concept in the GC au where Mal (temporarily) absorbs part of Ephem

[todays-xkcd]

The Doppler effect is a mysterious wavelength-shifting phenomenon which seems to primarily affect sirens, which is why the 🚨 emoji is red.

Doppler Effect [Explained]

Transcript

[Miss Lenhart is pointing with a stick to a whiteboard with various scientific drawings and words, including but not only a graph.] Miss Lenhart: The more distant a galaxy is, the redder its light. Miss Lenhart: Why? Well, that's an interesting question.

[Zoom in on Miss Lenhart.] Miss Lenhart: Ever notice how, when a siren is approaching, it sounds like Bweeeeeeeeee...

[Zoom in on Miss Lenhart with her arms raised.] Miss Lenhart: ...but then it zooms past you and goes Nyeeeeooooowww? Miss Lenhart: And sometimes they hit a button that makes it go Pyeew! Pyeew! really loud?

[Miss Lenhart with her finger raised is standing in front of the whiteboard and holding the stick down.] Miss Lenhart: And in Europe they go Ooooeeeeooooeeee... Off-panel voice: So why are galaxies red? Miss Lenhart: Oh, no idea. Miss Lenhart: Anyway, another siren I like is...

[milkydraws8]

Don't let him get up!

[livingforstars]

GRB 980703: A Reassuring Redshift - July 13th, 1998.

"In the old days, during 1997, astronomers had little idea of the true distance to gamma-ray bursts. Did these enigmatic explosions occur in our outer galaxy, or in the outer Universe? In May, 1997, a first telling distance measure was made - GRB 970508 showed an absorption line with a redshift of about 0.8 - indicating that this gamma-ray burst (GRB) was an enormous distance away. Skeptics, however, are not always convinced by an unrepeated measurement. Since then, though, other tantalising coincidences had occurred: GRB 971214 occurred unusually near a galaxy with the enormous redshift of 3.4, and GRB 980425 occurred unusually near a low-redshift supernova. Skeptics were intrigued. The potentially definitive implications of the above-pictured optical transient might impress even the cautious. GRB 980703's optical transient shows a well-measured redshift from both an absorption line and an emission line: 0.97. The above negative highlights the uncommon transient source with the label "OT", while letters designate common comparison stars."