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First images from Euclid are in

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Re: First images from Euclid are in

#331

Post by JohnBooty »

dreamcompiler wrote: post #288
seanw444 wrote: post #275

Earlier quoted context omitted.

This is short-sighted. Maybe not in our lifetimes. If it were 1902, you'd probably be mocking the Wright brothers.

There are three levels of difficulty in innovation: New Engineering, New Science, and New Fundamentals. What the Wright Brothers did was the easiest of the three: New engineering . It didn't contradict anything then known in accepted science. Fusion energy is being studied now, and it's substantially more difficult than what the Wright brothers did because it requires New Science. But it doesn't violate any of the ac…

   There are three levels of difficulty in innovation: 
   New Engineering, New Science, and New Fundamentals.
Wow, I've never seen this put so succinctly before.

Re: First images from Euclid are in

#332

Post by JohnBooty »

1970-01-01 wrote: post #303
dreamcompiler wrote: post #288

Earlier quoted context omitted.

There are three levels of difficulty in innovation: New Engineering, New Science, and New Fundamentals. What the Wright Brothers did was the easiest of the three: New engineering . It didn't contradict anything then known in accepted science. Fusion energy is being studied now, and it's substantially more difficult than what the Wright brothers did because it requires New Science. But it doesn't violate any of the ac…

IF you believe the whistleblowers, all the tech already exists. https://www.pbs.org/newshour/politics/watch-live-house-overs...

While the claims of the whistleblowers may or may not be true, your link is sworn Congressional testimony from credible sources.

So, despite the stigma attached to all things UAP/UFO, I think it should be upvoted and not downvoted.

Re: First images from Euclid are in

#333

Post by nashashmi »

tomrod wrote: post #65
wyldfire wrote: post #45

Earlier quoted context omitted.

The posit was "life evolved in many planets for sure" but your evidence is "us"?

We are a necessary but insufficient part of the proof of life. One cannot say "no proof" when necessary proof has been achieved. All that remains is a second example -- the first took several billion years to achieve self awareness. Like they say, the first million is the hardest.

But that is a belief that says it can happen again. It is not a proven belief. And the whole reason we are looking out in space is to prove it.

But I don't think we will find it. Life is special. The earth is special. And all the planets and all the stars and all the solar systems and all the galaxies cannot make something special again. So alas, we are earth. and we are all that is out there. And the rest of the universe is just there for our awe. That is how special we are.

Re: First images from Euclid are in

#334

Post by sensanaty »

I'm sure it's not a unique experience in any way, but thinking about space and the universe fills me with a weird and overwhelming... Dread? I don't know how to word it, but it feels terrifying thinking about the scale of it all, the numbers involved. So many galaxies, stars, planets. It feels like we have no hope whatsoever of ever seeing anything other than our little comfy nook we have here in our little solar system, and even then the scale involved is just incomprehensible.

I'm always speechless when I see these. Simply mind boggling

Re: First images from Euclid are in

#335

Post by dreamcompiler »

adamredwoods wrote: post #324
dreamcompiler wrote: post #292

Earlier quoted context omitted.

Well... you don't need to freeze people if you can travel at a substantial fraction of c, because of time dilation. Caveats: 1. It's really, really hard to supply enough energy to go that fast, even with fusion power. 2. Your passengers won't be able to go home again, because by the time they get back everyone they've ever known will be long dead. 3. Even if you could go that fast, you'll eventually hit a speck of du…

F=ma At 1% the speed of light (approx 3000000 m/s) and a medium-mass dust (1x10-5 kg, stationary), not enough force or area to dent steel (350 N/mm^2), but over time, lots of dust could cause erosion (quick math/estimates).

The relevant equation is for kinetic energy, which is 0.5mv^2. Using your numbers that's about 4.5E+7 Joules, or the energy of about 10kG of TNT exploding. That will certainly make a dent, and your space ship won't survive many of those.

I was thinking v would be more like 10% of c, which would mean about 1000kG (1 kiloton) of TNT, or about 1/20 of the energy of the Hiroshima atomic bomb. From a particle of dust weighing 10mG. You'd be toast.

Re: First images from Euclid are in

#337

Post by malodyets »

lynguist wrote: post #313
layer8 wrote: post #214

Earlier quoted context omitted.

It’s even more “massive” down below. There are only 27 orders of magnitude between human size and the size of the observable universe, but 35 orders of magnitude between human size and the Planck length. ;)

So we are rather “large” beings and not small ones. Are these orders of magnitude scaled by 10 to go from one to the next?

Powers of 10 is the classic presentation: https://youtu.be/0fKBhvDjuy0

Re: First images from Euclid are in

#338

Post by restalis »

skykooler wrote: post #135
cvoss wrote: post #107

Earlier quoted context omitted.

Really? I wouldn't think the sun is nearly massive enough to do what would be required here. Stars visible near the edge of the Sun appear in slightly different spots from their actual locations. If there was a distant planet directly behind the Sun whose light were focused back to an image on our side of the Sun, you'd have to get really far back from the Sun to resolve the image, no? And furthermore, it's exceeding…

Yes, you'd need to get quite far from the Sun to use it as a lens - about 650 AU is where it starts becoming practical. It would also not be re-orientable, so any "telescope" launched to that location would only be able to observe a single target. (But, notably, it is far easier to send a probe to a far point in our own solar system than it is to send it to another star entirely.) There's a paper that goes into much…

"It would also not be re-orientable, so any "telescope" launched to that location would only be able to observe a single target."

I just presume that such observation spacecraft makes sense to be made as a rather long term investment than some one-time fly-by thing like New Horizons, so the sensible thing to do is to have it in an orbit around the Sun at that (≥650AU) distance and to take multiple observations. Of course, the easiest solution may be for the orbit to be elliptical one, with the useful position only around its aphelion, in which case it will be able to observe only a single target indeed. But, I also presume that past the first few such elliptical orbit experiments the aim will shift to have the spacecrafts set on distant (and most likely circular) orbits that make possible observations at any time and thus its target would be something akin to a horizon rather than a single point, wouldn't it?

Re: First images from Euclid are in

#339

Post by grues-dinner »

uhtred wrote: post #306
ratedgene wrote: post #255

This is the most beautiful thing I've ever seen in my whole life. I'm just over here worried about small nothings and now I'm filled with an overwhelming feeling that I should be a part of something much larger. Truly inspiring, and a little bitter sweet. :)

Yes but what did you work on yesterday, what will you work on today, and are there any blockers?

And did you deliver value? https://youtu.be/DYvhC_RdIwQ
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