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First images from Euclid are in

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Re: First images from Euclid are in

#181

Post by namaria »

kranner wrote: post #114
Jun8 wrote: post #90

Watching this is ... hard to find the words to describe it. It's insane! It shows us how mind bogglingly vast the universe is and how we're literally nothing compared to it. Paradoxically, it also makes me feel incredibly potent and capable as a human being in that being this small we can know so much! Your size is to the distance of that distant spiral galaxy (420 Mly - 10e24m) as a neutrino is to you (effective cro…

That we can know anything at all is a miracle in itself. It could have been just fine evolutionarily for us Earth creatures to be no more than Large Action Models with no inner experience, but somehow we ended up as these perceiving, cogitating, apprehending beings.

Our existence and the universe being knowable is all intertwined.

A reverse entropy universe or a random one would preclude any meaningful learning, thus also the evolution of intelligence and technological civilization as well.

Re: First images from Euclid are in

#183

Post by satvikpendem »

conductr wrote: post #169
gary_0 wrote: post #139

Earlier quoted context omitted.

Given that the speed of light is the speed of causality, technically it's not really 420 million years in the "past" in any meaningful sense. The present is relative, not universal. The collected light we see in our telescopes is a lie about a particular universe that will never be, at least in any tangible way. On a cosmic scale, every spot in the universe sees its own unique sequence of events going on around it, a…

I’ll admit I’m severely undereducated in this stuff, probably less than an average high schooler these day but nevertheless I feel like I’ve considered this before and never knew it had a name. Which makes me feel not completely stupid. > whether two spatially separated events occur at the same time – is not absolute, but depends on the observer's reference frame. But What I don’t understand about this is why is “tim…

If not for observation, what does "happen" mean? Keep in mind observation in the physics sense doesn't mean conscious observation but rather that anything experiences something at all.

Re: First images from Euclid are in

#186

Post by gwd »

SoftTalker wrote: post #96
ants_everywhere wrote: post #27

Earlier quoted context omitted.

"But where is everybody?" [0] [0] https://en.wikipedia.org/wiki/Fermi_paradox

They are all wondering the same thing. Distances are so vast that the overwhelming probablity is that we'll just never notice each other.

How long did it take modern humans to completely colonize Earth, such that there are few places you can go on Earth and not meet any humans? Less than 10k years for sure.

If we become a space-faring civilization, how long will it take us to colonize the galaxy, such that there are few places you can go and not find evidence of humans around? Not more than a million years or so.

So if intelligent life -- capable of becoming a space-faring civilization -- is common, why is the galaxy not colonized already?

Kursgesagt has a good video on this: https://www.youtube.com/watch?v=UjtOGPJ0URM

Re: First images from Euclid are in

#188

Post by lloeki »

ujikoluk wrote: post #119
vasco wrote: post #78

Earlier quoted context omitted.

In another way it's really cool to be able to "see the past" even if all we see is always the past. At this level it is like a super power. If only some aliens had put a mirror somewhere far so we could see ourselves too. Or multiple mirrors at different distances. With enough mirrors and light bouncing around the size of the universe itself can be a "storage media" of the past with different photons all around carry…

For prior art in this field, see: https://github.com/yarrick/pingfs "pingfs is a filesystem where the data is stored only in the Internet itself, as ICMP Echo packets (pings) travelling from you to remote servers and back again." Also https://en.wikipedia.org/wiki/Delay-line_memory Storing data as acoustic waves gave a higher capacity in practice, as propagation is slower thus fitting a larger number of symbol per ti…

From chainsaws to ICMP echo packets (and more)

http://tom7.org/harder/

Re: First images from Euclid are in

#189

Post by konart »

patrickmcnamara wrote: post #145
shiroiushi wrote: post #52

Earlier quoted context omitted.

No, there's only one solar system in the entire universe. There's countless star systems though, but only one of those stars is named Sol. /pedant

Do people actually call the Sun "Sol"? I thought that was more of a video game thing.

It's Солнце (Solntse) in Russian.

Re: First images from Euclid are in

#190

Post by runj__ »

miunau wrote: post #6
ur-whale wrote: post #2

I wish there was a standardized way to let folks who run a website such as this one know how much a casual passer-by viewer enjoys the byproduct of their work.

If you're in the EU (particularly Germany, France and Italy, who are the three largest funders), you can let your representatives know you appreciate ESA's work.

Thank you for reminding me! Just sent a couple of emails to my representatives!
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