Science!

Plankton · 04-07-2022, 01:38 PM

Space Junk: https://platform.leolabs.space/visualization

debaserr · 07-11-2022, 06:17 PM

The James Webb Space Telescope dream is finally coming to fruition.

https://www.nasa.gov/image-feature/g...f-universe-yet

First teaser shot, tomorrow at 10:30am they have a big press conference with more.

Quote:

NASA’s James Webb Space Telescope has produced the deepest and sharpest infrared image of the distant universe to date. Known as Webb’s First Deep Field, this image of galaxy cluster SMACS 0723 is overflowing with detail.

Thousands of galaxies – including the faintest objects ever observed in the infrared – have appeared in Webb’s view for the first time. This slice of the vast universe covers a patch of sky approximately the size of a grain of sand held at arm’s length by someone on the ground.

This deep field, taken by Webb’s Near-Infrared Camera (NIRCam), is a composite made from images at different wavelengths, totaling 12.5 hours – achieving depths at infrared wavelengths beyond the Hubble Space Telescope’s deepest fields, which took weeks.

The image shows the galaxy cluster SMACS 0723 as it appeared 4.6 billion years ago. The combined mass of this galaxy cluster acts as a gravitational lens, magnifying much more distant galaxies behind it. Webb’s NIRCam has brought those distant galaxies into sharp focus – they have tiny, faint structures that have never been seen before, including star clusters and diffuse features. Researchers will soon begin to learn more about the galaxies’ masses, ages, histories, and compositions, as Webb seeks the earliest galaxies in the universe.

This image is among the telescope’s first-full color images. The full suite will be released Tuesday, July 12, beginning at 10:30 a.m. EDT, during a live NASA TV broadcast.

CLICK FOR JWST DEEP FIELD PIC: https://www.nasa.gov/sites/default/f...cs0723-5mb.jpg

HUBBLE COMPARISON PIC: https://i.redd.it/9uyhwijeo0b91.gif

Guybrush · 07-12-2022, 12:59 AM

Yes! I've been really looking forward to it

gonna try and find out when that conference is on for us Norwegians.

grindy · 11-14-2022, 11:28 AM

Should we abandon the multiverse theory? | Sabine Hossenfelder, Roger Penrose, Michio Kaku

I've heard about Kaku being a bit of a joke but never witnessed it. Guy's a grifter. Penrose and Hossenfelder destroy him and it's delicious.

Plankton · 12-14-2022, 06:54 AM

Scientists achieve a breakthrough in nuclear fusion.

Quote:

A U.S. lab has successfully sparked a fusion reaction that released more energy than went into it.

Light without heat?

Guybrush · 12-14-2022, 07:15 AM

Quote:

Originally Posted by Plankton

Scientists achieve a breakthrough in nuclear fusion.

Light without heat?

It is interesting if they can finally make something of it. I've read news now that they've had luck using AI to figure out the correct set of containment parameters or something.

About heat, it takes about a hundred million degrees to jumpstart fusion of hydrogen isotopes into helium (and a wayward neutron), something that I believe is always achieved with a laser. But it should give off more heat / energy than you have to use with the laser to kickstart it.

If the process is sustained, it'll produce heat that can be used to warm a liquid like water so that it becomes easy to turn into electricity with a steam turbine.

Marie might be interested and knowledgable about this, being a physicist.

Plankton · 12-14-2022, 07:32 AM

My comment was more of a quote from Steve Vai than an actual question. I'm clueless when it comes to physics.

Mindy · 12-14-2022, 10:24 AM

Quote:

Originally Posted by Plankton

Scientists achieve a breakthrough in nuclear fusion.

Light without heat?

pretty cool, wonder how it'll be for EVs and houses like it's probably still a ways away from personal usage.

Plankton · 12-14-2022, 10:49 AM

Afaik limitless zero carbon fusion energy reactors would replace the ones used now, so the only change the end consumer would see is cost. The delivery system would still be the same.

**Marie Monday** · 12-14-2022, 12:27 PM

Quote:

Originally Posted by Guybrush

It is interesting if they can finally make something of it. I've read news now that they've had luck using AI to figure out the correct set of containment parameters or something.

About heat, it takes about a hundred million degrees to jumpstart fusion of hydrogen isotopes into helium (and a wayward neutron), something that I believe is always achieved with a laser. But it should give off more heat / energy than you have to use with the laser to kickstart it.

If the process is sustained, it'll produce heat that can be used to warm a liquid like water so that it becomes easy to turn into electricity with a steam turbine.

Marie might be interested and knowledgable about this, being a physicist.

I'm a theoretical physicist so I know very little about more practical things like these. I listened to a talk by a fusion reactor scientist once but I don't remember much of it except I think for various practical reasons there's a lot of energy loss, so only a small part of the generated energy can be used

04-07-2022, 01:38 PM	#811 (permalink)
Plankton Just Keep Swimming... Join Date: Apr 2012 Location: See signature... Posts: 7,765	Space Junk: https://platform.leolabs.space/visualization __________________ See location...

07-12-2022, 12:59 AM	#813 (permalink)
Guybrush Juicious Maximus III Join Date: Nov 2008 Location: Scabb Island Posts: 6,525	Yes! I've been really looking forward to it gonna try and find out when that conference is on for us Norwegians. __________________ Something Completely Different

11-14-2022, 11:28 AM	#814 (permalink)
grindy . Join Date: Oct 2014 Location: . Posts: 7,201	Should we abandon the multiverse theory? \| Sabine Hossenfelder, Roger Penrose, Michio Kaku I've heard about Kaku being a bit of a joke but never witnessed it. Guy's a grifter. Penrose and Hossenfelder destroy him and it's delicious. __________________ *A smell of petroleum prevails throughout.*

12-14-2022, 07:32 AM	#817 (permalink)
Plankton Just Keep Swimming... Join Date: Apr 2012 Location: See signature... Posts: 7,765	My comment was more of a quote from Steve Vai than an actual question. I'm clueless when it comes to physics. __________________ See location...

12-14-2022, 10:49 AM	#819 (permalink)
Plankton Just Keep Swimming... Join Date: Apr 2012 Location: See signature... Posts: 7,765	Afaik limitless zero carbon fusion energy reactors would replace the ones used now, so the only change the end consumer would see is cost. The delivery system would still be the same. __________________ See location...