search results matching tag: Hubble

» channel: learn

go advanced with your query
Search took 0.000 seconds

    Videos (114)     Sift Talk (3)     Blogs (13)     Comments (112)   

Astrophysicist's reacts live to multiple new JWST images

The limits of how far humanity can ever travel - Kurzgesagt

robdot says...

The speed of the expansion of the universe is known, its the hubble constant. And the further away points in space are from us, the faster they are accelerating away.
The closest galaxy to us is 25.000 light years away. A light year is 6 trillion miles. So, its 25.000 x 6 trillion miles. So,no,we are not gonna get there. And for sure not outside our local group.

SDGundamX said:

If I'm doing the math correctly, the universe is expanding at around 46 miles per second, which is around 165,000 mph. Is there some reason why humans could not overcome this speed limit? It doesn't seem that exceptionally fast (no where near as fast as the speed of light), and if you accelerate slowly to it, like over several days or weeks, the g-forces involved wouldn't be that extreme, would they? The video didn't really explain why we could never go fast enough to overcome the expansion rate.

Also, I thought most theortical physicists like Stephen Hawking believe that in the future technology could advance enough to allow us bend space-time and hence travel "faster than the speed of light" without actually travelling faster than the speed of light, basically like folding a piece of paper and sticking a pin through both sides. When you lay the paper down flat, the two holes will seem quite far away from each other, but when you fold the paper, the holes are right next to each other. Our current understanding of physics doesn't rule out the possibility (at least from a mathematical perspective) although generating the energy necessary to perform such a feat would of course be problematic.

NASA | Hubble Memorable Moments: Tinkertoy Solution

NASA | Hubble Memorable Moments: Tinkertoy Solution

ChaosEngine (Member Profile)

Hubble Space Telescope fly-through of the Gum Nebula

HenningKO says...

Well THIS one is obviously a CG interpretation, perhaps arranging real photographs in a 3D program and then moving a virtual camera through them...
But the spectacular Hubble still photographs are REAL in the sense that they are graphs of real photons coming off real stuff out there. Just filtered for different spectra and then composited back together, packing more information into a single image.
http://hubblesite.org/gallery/behind_the_pictures/meaning_of_color/index.php
I know what you mean though. There are no "natural light" cameras on the Hubble. That would be a waste of space.

Hubble Space Telescope fly-through of the Gum Nebula

newtboy says...

Beautiful, but I have an issue with these 'Hubble images' that aren't real images, but are interpretations of the actual images. It's hard to know how good real Hubble images are, because so many that we see are also nothing but interpretations.
There was a great NOVA about it this week, timed for the 25th anniversary of deployment. Unfortunately, I think they also 'interpreted' some of the images, keeping me confused about the real resolution Hubble provides. I want to see the raw, unaltered images, maybe side by side with an 'interpretation' to get a better idea of what we really get from Hubble.

Police Detonate Nine Tonne of Seized Fireworks

Gigapixels of Andromeda [4K]

newtboy jokingly says...

FAKE!!!
The Hubble is in space, so why are there mountains in the foreground at the end?!? ;-)
*quality
Now I want a 50" 4k touchscreen picture frame with 4.5 gigs of ram to properly display this at home.

atara (Member Profile)

Blasting a mountain top to build world's 'biggest' telescope

ChaosEngine says...

Just to play devils advocate....

a ground based optical telescope? Really?

Surely no matter how good your optics, you will still suffer from atmospheric interference. Wouldn't we be better off with another hubble?

ChaosEngine (Member Profile)

ChaosEngine (Member Profile)

Misconceptions About the Universe - Veritasium

siftbot says...

Tags for this video have been changed from 'veritasium, space, universe, lightspeed, observable, hubble, derek, muller' to 'veritasium, space, universe, lightspeed, observable, hubble, derek muller' - edited by xxovercastxx

Hubble looks to the monkey head nebula



Send this Article to a Friend



Separate multiple emails with a comma (,); limit 5 recipients






Your email has been sent successfully!

Manage this Video in Your Playlists

Beggar's Canyon