alt.hn

8/21/2026 at 6:36:34 PM

Scientists release biggest 2D map of the universe

 https://newscenter.lbl.gov/2026/08/10/scientists-release-biggest-2d-map-of-the-universe/

by NKosmatos

8/21/2026 at 10:35:51 PM

Researchers expect it will remain the most comprehensive 2D map of our universe for years to come.

Most likely. I doubt there is going to be any serious investment in astronomy over the next decade given economic headwinds and a deteriorating strategic situation. The big money will be going into defense and economic sovereignty and building/launching new high powered telescopes will not be a priority. Optical/sensor advances will be prioritized for earth observation (commercial, military, or weather/climate) and it maybe that we're in an era of diminishing technological returns already. I do expect a lot of analytical advances thanks to the combination of open datasets and AI, although it seems more likely that most of these will be in stamp collecting - interesting astronomical facts for people who are already interested in astronomy. Hard to guess if we will see challenges to prevailing cosmological theories.

by anigbrowl

8/22/2026 at 12:25:57 AM

Telescope design, funding, and construction is a long long process, longer than any administration, and there are some truly wonderful telescopes coming online right now.

The Nancy Grace Roman telescope is scheduled to launch in 9 days, on August 30. She was known as the Mother of the Hubble telescope, and the Roman telescope will be able to cover something like 100x the area of sky at the same detail as the Hubble. This will allow surveying a huge fraction of the sky compared to what Hubble could do. (Great video summary here https://www.youtube.com/watch?v=-EiTby2Lku8 )

The European Space Agency also launched Euclid last year, which is super focused on surveying huge amounts of the sky.

The damage being done to the US will take about a decade to fully play out. We are eating our seed corn right now, because management is a rentier who doesn't understand productive expansion of the economy through innovation. If the damage persists, we will be lapped by other nations. Europe isn't quite ready to zoom forward, but China and India are very happy to.

by epistasis

8/22/2026 at 3:39:49 AM

> Researchers expect it will remain the most comprehensive 2D map of our universe for years to come.

This is Rubin Observatory erasure

by gammarator

8/21/2026 at 10:42:44 PM

Telescopes are related to spy satellites, something that will remain in high demand. The telescopes provide a good cover story for international press.

by zappb

8/22/2026 at 1:00:13 AM

Wasn't the Hubble telescope a spare from the surveillance satellite program that they basically just turned towards space?

by smilespray

8/22/2026 at 1:06:12 AM

Not quite. It was developed using some shared technology from the KH-11. Very different optics and sensors, for sure, looking out into space is a lot different from looking at something a couple hundred miles away.

by rootusrootus

8/22/2026 at 1:45:13 AM

The type of telescopes you would use to look at the earth from space are not at all the same as the types of telescopes you would use to look back into deep time. I think the two use cases would compete for funding rather than complement each other.

Maybe there is some technological overlap in the optical telescope space, but that is only a subset of the types of telescopes that you would use to study what the universe looked like when the first stars were forming.

by catlifeonmars

8/22/2026 at 3:38:45 AM

Roman was literally donated to NASA by the National Reconnaissance Office https://en.wikipedia.org/wiki/2012_National_Reconnaissance_O...

by gammarator

8/22/2026 at 1:23:38 PM

It was donated without CCDs or electronics, which is what makes the difference between earth and space observation satellites. NASA only got the body and optics (mirrors), they had to provide their own sensors.

by akiselev

8/22/2026 at 2:24:47 AM

The overlap is very well known and i don’t get why your arguing this point since it’s literally been a source of space telescope tech in the past https://en.wikipedia.org/wiki/KH-11_KENNEN

by AnotherGoodName

8/22/2026 at 9:47:28 PM

> Maybe there is some technological overlap in the optical telescope space

So I never disagreed with you. I think the overlap will diverge. Optical telescopes are of limited utility for eg observing gravitational waves or neutrinos

by catlifeonmars

8/21/2026 at 10:51:57 PM

> deteriorating strategic situation. The big money will be going into defense and economic sovereignty

That's not incidental, but a situation pushed for by people that will benefit from defense spending and from giving ordinary people's money (via taxes and protectionism) to wealthy, second-rate corporations.

It's obviously undesirable to the great majority, and we can make a different situation if we want to.

by mmooss

8/23/2026 at 12:09:06 AM

Is this based off anything other than feelings?

by NuclearPM

8/21/2026 at 10:13:33 PM

I've got some crazy feelings browsing this.

Are there any particularily detailed areas? But maybe the humbling reality is just: The closer we look, the more galaxies appear where we thought was black void…

by KaiMagnus

8/22/2026 at 12:11:49 AM

And we can only look as far as the CMB. The universe might be gazillion times larger beyond that, or, indeed, infinitely large.

by layer8

8/22/2026 at 5:09:51 AM

Don't we more or less already know that the universe - at least the space itself, not the stuff in it - is indeed infinitely large?

by squigz

8/22/2026 at 12:47:46 PM

We don’t, and it’s likely that we will never know. Space may be non-Euclidian with a positive curvature, in which case it would correspond topologically to the “surface” of a four-dimensional sphere. One much larger than the observable universe (since the local curvature that we can measure is approximately flat), but nevertheless finite.

by layer8

8/22/2026 at 2:24:15 PM

I really have no idea what this means but I guess my mental model of the universe is quite wrong haha

by squigz

8/22/2026 at 5:27:17 PM

An ant on the surface of the Earth might believe that the Earth’s surface (“space”) is infinitely large. But because it can never look beyond the horizon, it can’t know. If it is intelligent, it has to assume that the surface might be curved and curve into a sphere, hence making it a finite surface.

Actual space and the universe is sort-of an analogy one dimension higher up. “Sort of”, because (1) we don’t imagine a surrounding four-dimensional space for curved space in the sense in which Earth’s surface is embedded in three-dimensional space, and (2) the cosmological horizon has a different cause (namely the speed-of-light limit) than the horizon of a planet.

Here is an alternative way to think about it: You can’t exclude the possibility that if you’d travel in a straight line in one direction through space, that you’d eventually end up where you started (i.e. like in the classic Asteroids game). Space might be connected like that, and then it would have a finite volume.

by layer8

8/22/2026 at 2:41:59 PM

Bringing it down a dimension:

> The earth may be round, in which case we’re on the “surface” of a three-dimensional sphere. One much larger than what we’ve seen (since the ground around us is approximately flat), but nevertheless finite.

Of course maybe the 4D sphere of the universe is itself hung in a vast field of other 4D universes, that field is the surface of a 5D sphere, etc.

by mbil

8/22/2026 at 6:51:54 AM

It’s still an open question in cosmology. We’re still not sure even if it’s “flat”.

by jahnu

8/22/2026 at 1:00:47 PM

Somewhere way out there another life is looking at a similar map and feeling the same!

by 1970-01-01

8/21/2026 at 9:05:56 PM

For 2001 fans, Atmosphères by Ligeti[1] also works very well while doom scrolling the endless canvas that is the Universe.

[1] https://ubu.com/sound/ligeti.html

by Towaway69

8/21/2026 at 7:43:01 PM

That's impressive. Though I think there's too much space on this plane. I'm wondering whether it is actually a 2D view since it obviously isn't planar.

To paraphrase Samuel L Jackson - "I have had it with this m'f'ing space on a plane! Everybody strap in I'm about to open some f'in' windows."

Proceeds to crank open an array of telescopes to get another 3D perspective of a 4D universe so we can project it onto our 2D viewing devices as if that were reality.

by doodlebugging

8/22/2026 at 12:14:00 AM

It’s 2D in the same sense as a 2D map of the world (Earth).

by layer8

8/23/2026 at 7:25:26 PM

Sorry. That whole post was intended to be a joke. I did not do a good job setting it up or letting it fly.

by doodlebugging

8/21/2026 at 10:57:10 PM

It's 2D because it's the surface of a sphere.

by fluoridation

8/23/2026 at 7:25:31 PM

Sorry. That whole post was intended to be a joke. I did not do a good job setting it up or letting it fly.

by doodlebugging

8/21/2026 at 8:50:41 PM

Seems like some of the most interesting objects are missing or have weird red/green artifacts, why is that?

by pants2

8/21/2026 at 9:59:26 PM

I read the article but didn't watch the videos yet, but I'm curious as to what would be needed to make this a 3D map. That is, I'm assuming this 2D map records the position of all of these objects in the sky, but not the distance from Earth. But I thought that calculating the distance of objects is relatively straightforward, e.g. you hear all the time "Galaxy X is 2 billion lightyears away" or whatever. Would it just be really computationally expensive to calculate the distance to all of the 4 billion objects identified in the map?

by hn_throwaway_99

8/21/2026 at 10:47:25 PM

They do this mostly with spectroscopy, breaking out the light by frequency. The longer the light has been travelling, the more frequency shifts into redder frequencies, because the universe is continually expanding.

But those distances are all built on top of the cosmic distance ladder (Terence Tao explaining on 3blue1brown)

https://youtu.be/YdOXS_9_P4U?is=jbkFbwWKgbn3yOjq

Maps like DESI add the 3d distances.

https://www.desi.lbl.gov/education-outreach/interactive-visu...

by epistasis

8/21/2026 at 10:46:20 PM

There are a lot of unknowns and processes that must be undone, which often require an unknown basis. Red shift, moving bodies, gravitational lensing and other processes distort light along its journey. Sometimes we don't know the exact magnitude of a star, etc. Spectroscopy helps a lot but is limited by the fidelity of our datasets.

by soulofmischief

8/21/2026 at 10:55:18 PM

Celestia might be what you're looking for.

by fluoridation

8/21/2026 at 10:04:29 PM

I think it is 2D because the universe is not that thick?

by LeBit

8/22/2026 at 12:30:43 AM

I will add that it is said the universe is flat, but that does not mean 2d flat. Flat is a mathematical construct, which means parallel lines stay parallel and triangle angles sum to 180 degrees. So it is 3d flat at least as far as we can observe.

by jbritton

8/23/2026 at 5:16:05 PM

I was mistaken.

Our solar system is flat.

Galaxies are mostly flat.

But the universe is not flat. Galaxies are all over the place.

So, I was mistaken.

But, just to be clear: I am not a flat earther! Flat is relative here. The thickness of our galaxy is not measured in kilometers ofc. It is just that within the same units , solar systems and galaxies are flat relative to their length.

by LeBit

8/22/2026 at 5:26:32 AM

I'm surprised the current US federal government is allowing its employees to publish anything with evidence the universe is >6000 years old.

by walrus01

8/21/2026 at 3:08:23 AM

Wow, this is humbling

by fercircularbuf

8/21/2026 at 7:52:58 PM

In what ways? Galaxies are just fat fucks, they don't do no philosophy, play piano or shitpost.

by sambapa

8/21/2026 at 8:00:52 PM

If you squint, look at just the right portion, at just the right zoom level, the stars line up and spell out "thanks for all the fish".

by Towaway69

8/21/2026 at 8:07:50 PM

Hm, that's a good thing to consider - are there portions of the sky in which stars align into a coherent text?

by sambapa

8/21/2026 at 8:15:57 PM

Just gotta join the dots! ;)

Or better still, develop a traveling salesman solution for visiting each star just once.

> Bowerick Wowbagger the Infinitely Prolonged was a being who became immortal after an accident with a few rubber bands, a liquid lunch, and a particle accelerator. After a period of total boredom, especially on Sunday afternoons, he decided to insult everyone in the entire universe in alphabetical order. [1]

So that wouldn't be just an academic exercise!

[1] https://hitchhikers.fandom.com/wiki/Bowerick_Wowbagger

by Towaway69

8/21/2026 at 8:37:26 PM

I think the odds of a character are very high, the odds of a short word are very high, the odds of a meaningful sentence are quite low, and the odds of anything more than that vanishingly small. It probably also depends on whether you're ok with viewing your assembly from an arbitrary position or if it must be from earth.

by idiotsecant

8/21/2026 at 8:18:56 PM

Feed it to an LLM to see what it hallucinates

by dylan604

8/22/2026 at 4:04:30 PM

Presumably because even if galaxies are just big things, there are probably things in them that do philosophy, play pianos (roughly speaking) and shit post.

by nathan_compton

8/21/2026 at 10:54:31 PM

[dead]

by heroku

8/20/2026 at 10:39:45 PM

make sure you watch the youtube video embedded in the website, it adds some real perspective of just how massive this is

by therobot24

8/21/2026 at 8:14:06 PM

Yep and the examples are really cool!

by Snoeprol

8/21/2026 at 8:38:16 PM

Could this be used for a new Elitelike game?

by Razengan

8/21/2026 at 9:28:00 PM

vaguely related to universe maps, I've been holding my breath for the Nancy Grace Roman Space Telescope launch at the end of the month

It's going to do the best surveys EVER, like exponentially better

* https://svs.gsfc.nasa.gov/14942/

I thought for sure DOGE was going to kill it, or even rename it after him instead

But the smallest planet Roman will be able to see would be Jupiter sized

There was however going to be another telescope scheduled to launch in 2040 that could find earth-like worlds

Fittingly enough it is called the "Habitable Worlds Telescope"

but you know what, DOGE got that one

Congress allocated $150 Million to begin development this year

Somehow the executive branch pocketed that and changed it to $5 Million instead despite having no right to do that

Yet another crime against science by this administration

Hoping new Congress in January 2027 can fix this but I doubt it as too much of the rest of the country is "on fire" that has to be put out first

So now won't be able to see its results in my lifetime

by ck2

8/22/2026 at 9:47:06 AM

Took notes, thank you

by hnfwd5lqmp

8/21/2026 at 8:35:09 PM

Not many people know this, but the actual universe is 3D, so this map is misleading.

by antonvs

8/21/2026 at 8:22:14 PM

i note the hyperspace bypass is missing

by ionwake

8/22/2026 at 1:40:51 AM

getting a 502

by ed_mercer

8/21/2026 at 7:55:35 PM

why is there so many weird flat lines is that an artifact?

this is fascinating wish there was a 360 VR version of this

truly immense scale

by zuzululu

8/21/2026 at 8:21:03 PM

back when I was playing with making VR content, this is one of the first things I did by using an 8K rectilinear image from NASA. Mapped it to a sphere and lined up Polaris at the zenith, and then just had one of the best nights of stargazing I had ever had!

by dylan604

8/21/2026 at 9:06:26 PM

Absolutely crazy

by TheSpacerr

8/22/2026 at 1:49:15 AM

Just tell me the Universe is a simulation please...

by eliax

8/21/2026 at 8:46:29 PM

Holy shit, this is very impressive

by cryptolobster

8/22/2026 at 4:29:28 PM

[dead]

by robertoconnor

8/22/2026 at 4:22:30 PM

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by zerodocapp

8/22/2026 at 8:19:03 AM

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by ChristmasTomer

8/21/2026 at 10:42:01 PM

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by nicechianti