Anonymous at Tue, 26 Nov 2024 04:49:34 UTC No. 16493737

>>16493732
I've done some researched and it seems like the supergalactic coordinate system is close to what I want, but what if the supergalactic plane is rotating? It's the same problem as using equatorial coordinates where the reference point itself is rotating.

🗑️ Anonymous at Tue, 26 Nov 2024 05:16:40 UTC No. 16493752

you've never even passed astronomy 101 and you think you're going to solve the mysteries of the universe because you have an irrationally high opinion of yourself and grandiose delusions about your intellectual capabilities, you're probably a drug addict of some sort. people who are addicted to happy pills are extremely prone grandiose delusions and irrationally high opinions of themselves

Anonymous at Tue, 26 Nov 2024 05:17:41 UTC No. 16493754

>>16493752
I just thought it'd be cool if we had a generic coordinate system? I'm just trying to learn???

Anonymous at Tue, 26 Nov 2024 05:31:22 UTC No. 16493763

>>16493752
holy mother of projection

🗑️ Anonymous at Tue, 26 Nov 2024 05:43:49 UTC No. 16493770

>>16493763
while I was getting my undergraduate degree in astronomy I had a job managing the on campus telescope and one night every two weeks we had a public lecture on astronomy followed up by public viewing of the sky with the campus telescope. on that night I ran the telescope and had to listen to every druggie schizo who walked through the door telling me about how he had the whole universe figured out. 4chan/sci is of course also a massive magnet for people of that ilk.
not once during my entire tenure running public evenings at the campus telescope did a single person with a good idea in their head come up to see me, they were 100% schizo retards. I kept on thinking that the odds were eventually going to bring me a genius who has something worthwhile to say, but it never happened. the only smart people who ever showed up were the amateur telescope makers, some of them were quite skilled and intelligent and could have worked professionally in the optics industry. the reason they were different from the schizos was because they had to work with physical objects and if they tried out a weird idea and it didn't work out then the results were readily apparent.

Anonymous at Tue, 26 Nov 2024 07:21:19 UTC No. 16493833

>>16493770
doesn't give you the right to make fun of someone who's probably just a kid trying to learn

Anonymous at Tue, 26 Nov 2024 07:25:05 UTC No. 16493834

>>16493770
You're the schizo

This whole simulation was a bird attack

Anonymous at Tue, 26 Nov 2024 08:02:11 UTC No. 16493852

>>16493770
Wagie customer relations job. You aren't even qualified to be on this board.

Anonymous at Tue, 26 Nov 2024 09:04:33 UTC No. 16493888

Yes, and it is already used to define a reference frame. But it defines a velocity rather than a set of angles, this is called the CMB reference frame. It is the velocity at which an observer sees no dipole due to their velocity wrt the CMB. For example we are moving at 370 km/s with respect to the CMB reference frame. Some of that is the Solar System moving round the Galaxy, but most of it is a random velocity the Milky Way has. This little velocity needs to be corrected for when doing some cosmology as it can bias what you measure.

Note however it's not a universal thing, if you moved far enough away you would see a slightly different CMB and measure a different reference frame. It defines a local rest frame.

One could in principle pick a random feature to use for an angular coordinate system, but super galactic coordinates already existed before the CMB was well measured. So it's slightly redundant. And unlike the CMB rest frame an angular system of coordinates isn't really that useful.

Anonymous at Tue, 26 Nov 2024 09:15:16 UTC No. 16493893

I think this could be a good start OP https://en.wikipedia.org/wiki/Astronomical_coordinate_systems

Anonymous at Tue, 26 Nov 2024 09:35:29 UTC No. 16493900

>>16493888
>>16493893
Thank you Anons. Using the CMB as a reference frame for velocity sounds interesting. So you're saying that the super galactic coordinate system is basically almost as universal? And I guess we could play that game forever of going, "but what if the CMB is moving?" The wikipedia article also seems like a really nice, beginner-level guide.

Anonymous at Tue, 26 Nov 2024 13:38:41 UTC No. 16494021

>>16493900
It's not that super galactic coordinates are universal, it's that the need for them is only really a local thing. When you look on larger scales it's pretty homogeneous, and so one set of coordinates is as good as any other. Super galactic coordinates have mostly fallen out of use, it's more a historical thing now.
>And I guess we could play that game forever of going, "but what if the CMB is moving?
Related to that there is the issue that the CMB may be lopsided. The rest frame comes from assuming the dipole (difference between different hemispheres) is driven by velocity only but there could be a primordial component. But people have tried to measure the distrotion due to relativistic beaming, which makes the features slightly bigger and brighter in the direction of travel. This is consistent with no intrinsic dipole and it being all velocity, but there could be some.
Also the CMB could be moving, but with respect to what? The rest frame is usual because it makes observations more unbiased.

Anonymous at Tue, 26 Nov 2024 14:05:36 UTC No. 16494054

>>16493732
yeah, problem is we ended up proving that the universe is centred around us the so called axis of evil

Anonymous at Tue, 26 Nov 2024 18:32:31 UTC No. 16494289

>>16493732
>Is it possible to use the CMB as a reference point to define the orientation of Earth?
Yes
>Has someone done this?
Yes

From the beginning of the wiki page on CMB
>The radiation is isotropic to roughly one part in 25,000: the root mean square variations are just over 100 μK,[7] after subtracting a dipole anisotropy from the Doppler shift of the background radiation. The latter is caused by the peculiar velocity of the Sun relative to the comoving cosmic rest frame as it moves at 369.82 ± 0.11 km/s towards the constellation Crater near its boundary with the constellation Leo

Anonymous at Thu, 28 Nov 2024 05:33:16 UTC No. 16495915

>>16493732
Is the image supposed to represent a sphere that is opened to a flat plane? And we are at the center of the sphere since all the measurements were taken by scanning outward in all directions, or just looking into one section of space.