Difference between revisions of "Talk:2596: Galaxies"
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While space contains contains a vast number of things, it's still mostly empty. Like, on average, few atoms in whole square meter. Atoms of hydrogen, usually. Imagining so much of practically empty space is even harder than imagining all the stuff in it. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 05:50, 22 March 2022 (UTC) | While space contains contains a vast number of things, it's still mostly empty. Like, on average, few atoms in whole square meter. Atoms of hydrogen, usually. Imagining so much of practically empty space is even harder than imagining all the stuff in it. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 05:50, 22 March 2022 (UTC) | ||
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| + | It took me half a minute to understand it: not galaxies within the circle, but within the region of the sky with the same apparent size from your position as the circle. [[Special:Contributions/162.158.22.175|162.158.22.175]] 10:19, 22 March 2022 (UTC) | ||
Revision as of 10:19, 22 March 2022
I bet this was inspired by the image from the James Webb Space Telescope after fine alignment was complete: https://www.nasa.gov/sites/default/files/thumbnails/image/telescope_alignment_evaluation_image_labeled.png. That image shows the one star that JWST was focused on, along with a bunch of galaxies in the far background demonstrating that there are a lot of galaxies. Orion205 (talk) 04:52, 22 March 2022 (UTC).
My thoughts exactly - definitely a JWST thing.172.70.218.75 07:09, 22 March 2022 (UTC)
Speaking of JWST, isn't the "only a few stars, and probably no planets." just a nod to the fact that one of the missions of its infrared astronomy is to "see back in time to the first galaxies forming just a few hundred million years after the Big Bang."? i.e.: given the conical shape of the sector of universe covered by the pin-hole, most of the galaxies in it will be the furthest back, thus those of which we see the "oldest" picture and thus which much earlier in their process of forming stars and planets? DrYak (talk) 09:17, 22 March 2022 (UTC)
While space contains contains a vast number of things, it's still mostly empty. Like, on average, few atoms in whole square meter. Atoms of hydrogen, usually. Imagining so much of practically empty space is even harder than imagining all the stuff in it. -- Hkmaly (talk) 05:50, 22 March 2022 (UTC)
It took me half a minute to understand it: not galaxies within the circle, but within the region of the sky with the same apparent size from your position as the circle. 162.158.22.175 10:19, 22 March 2022 (UTC)
