Just imagining the number of unique worlds these 800k galaxies contain really blows my mind. Especially when there are probably a lot more to be discovered.
pantulis · 3h ago
And consider these are 800k galaxies mapped in the subtending angle of three moons in the sky...
vitorbaptistaa · 2h ago
If Claude is correct, these 0.54 square degrees represent 0.0013% of the full 41,253 square degrees of the sky (4*pi steradians).
tiagod · 52m ago
I checked the math and it is correct!
So assuming this is a representative sample, there would be 800000/0.000013 ~= 61 billion galaxies in the celestial sphere.
According to Wikipedia, "It is estimated that there are between 200 billion to 2 trillion galaxies in the observable universe."
Huh, I thought there would be more. Like billions of galaxies.
merek · 2h ago
They only observed an area of sky approximately the size of "three full moons"
> By using the data from the James Webb Space Telescope’s 6.5‑meter (21-ft) mirror, scientists at UC Santa Barbara have surveyed 0.54 square degrees of sky, which is equivalent to the area of three full moons when viewed from Earth. Charting nearly 800,000 galaxies, the COSMOS-Web dataset covers almost 98% of cosmic history.
According to Wikipedia, "It is estimated that there are between 200 billion to 2 trillion galaxies in the observable universe."
Edited: Off by some orders of magnitude.
https://cosmos2025.iap.fr/fitsmap/
> By using the data from the James Webb Space Telescope’s 6.5‑meter (21-ft) mirror, scientists at UC Santa Barbara have surveyed 0.54 square degrees of sky, which is equivalent to the area of three full moons when viewed from Earth. Charting nearly 800,000 galaxies, the COSMOS-Web dataset covers almost 98% of cosmic history.