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Archive for the ‘space’ category: Page 121

Nov 26, 2023

Earth’s Center Is 2 Years Younger Than Its Surface Because Of Time Dilation

Posted by in categories: physics, space

Here’s an unusual fact that takes a bit of explaining. The center of the Earth is around two and a half years younger than the surface.

About 4.6 billion years ago, a hot cloud of dust orbiting the Sun coalesced and cooled. As it did so, the heavier elements formed the center of the Earth, while lighter elements formed the mantle, and the thin layer of crust formed on the surface. This all took place at the same time, with the minor caveat that Earth has accumulated more matter in the intervening years, including potentially from planet Theia, which may have formed the Moon and left mysterious structures deep within the Earth. And yet now the center is younger than the outer bits. How?

A team of physicists calculated this strange fact in 2016. The team was aware that in the 1960s theoretical physicist Richard Feynman gave a lecture in which he stated, according to the possibly erroneous transcription, that the center of the Earth is “one or two days” younger than the surface because of the time-dilating effects of gravity. The team write that they had seen this claim repeated without being checked, likely due to “proof by ethos”, where a scientist’s status is so high that their results and calculations aren’t questioned.

Nov 25, 2023

The Moon is a Harsh Mistress [2/2] by Robert A. Heinlein (Roy Avers)

Posted by in category: space

Part 2 ||||| You can find Part 1 here: https://youtu.be/aaf3Gwp_bfQ
Chapter list:
00:00:00 — (14) A Rabble In Arms 01
00:46:09 — (15) A Rabble In Arms 02
01:12:19 — (16) A Rabble In Arms 03
01:46:14 — (17) A Rabble In Arms 04
02:14:56 — (18) A Rabble In Arms 05
02:56:08 — (19) A Rabble In Arms 06
03:17:59 — (20) A Rabble In Arms 07
03:32:50 — (21) A Rabble In Arms 08
03:59:34 — (22) A Rabble In Arms 09
04:27:51 — (23) “Tanstaafl!” 01
04:39:45 — (24) “Tanstaafl!” 02
05:00:44 — (25) “Tanstaafl!” 03
05:27:54 — (26) “Tanstaafl!” 04
05:52:31 — (27) “Tanstaafl!” 05
06:14:53 — (28) “Tanstaafl!” 06
06:42:52 — (29) “Tanstaafl!” 07
06:48:24 — (30) “Tanstaafl!” 08

Like these books? Want to help?
These books come from the National Library Services.
I encourage you to donate:
https://www.loc.gov/nls/about/donate/

Nov 25, 2023

The Moon is a Harsh Mistress [1/2] by Robert A. Heinlein (Roy Avers)

Posted by in categories: computing, space

“Luna is a twenty-first-century penal colony but, since no one can stand Earth gravity after being on the moon for a few weeks, all who are sent there must stay. When the liberated people rise against the authority, they receive unexpected help from a computer with a personality.“
Part 1 ||||| You can find Part 2 here: https://youtu.be/P1jI2Oh4-lo.
Chapter list:
00:00:00 — (i) Book info.
00:02:25 — (01) That Dinkum Thnkum 01
00:27:06 — (02) That Dinkum Thnkum 02
00:57:20 — (03) That Dinkum Thnkum 03
01:35:45 — (04) That Dinkum Thnkum 04
02:03:08 — (05) That Dinkum Thnkum 05
02:34:06 — (06) That Dinkum Thnkum 06
03:09:22 — (07) That Dinkum Thnkum 07
03:30:53 — (08) That Dinkum Thnkum 08
03:49:45 — (09) That Dinkum Thnkum 09
04:46:19 — (10) That Dinkum Thnkum 10
05:12:25 — (11) That Dinkum Thnkum 11
05:47:51 — (12) That Dinkum Thnkum 12
06:08:50 — (13) That Dinkum Thnkum 13

Like these books? Want to help?
These books come from the National Library Services.
I encourage you to donate:
https://www.loc.gov/nls/about/donate/

Nov 25, 2023

NASA receives laser-beamed message from 10 million miles away

Posted by in category: space

Basically on the pro side it could be something good to help earth but really if is on the bad side we probably want to cloak the earth with an invisibility cloak and force fields ideally so they don’t wipe us out.


An experiment aboard NASA’s Psyche mission achieved “first light” by sending and receiving its first deep-space laser communications from far beyond the moon.

Nov 25, 2023

Scientists Say There May Be Life Under Mercury’s Salt Glaciers

Posted by in categories: biological, space

The planet Mercury seems like a place inhospitable to life, with surface temperatures reaching a blistering 800 degrees Fahrenheit due to its extremely close proximity to the Sun.

But new research suggests that there are regions on the Solar System’s smallest planet that may have the right conditions for biological life to survive.

Scientists at the Planetary Science Institute (PSI) in Arizona say they’ve found evidence of salt glaciers on the planet’s surface, regions that are similar to extremely harsh and salt-rich environments on Earth where life still finds a way to exist.

Nov 25, 2023

Pentagon steps on AI accelerator as age of lethal autonomy looms

Posted by in categories: drones, military, robotics/AI, space, surveillance

NATIONAL HARBOR, Md. (AP) — Artificial intelligence employed by the U.S. military has piloted pint-sized surveillance drones in special operations forces’ missions and helped Ukraine in its war against Russia. It tracks soldiers’ fitness, predicts when Air Force planes need maintenance and helps keep tabs on rivals in space.

Now, the Pentagon is intent on fielding multiple thousands of relatively inexpensive, expendable AI-enabled autonomous vehicles by 2026 to keep pace with China. The ambitious initiative — dubbed Replicator — seeks to “galvanize progress in the too-slow shift of U.S. military innovation to leverage platforms that are small, smart, cheap, and many,” Deputy Secretary of Defense Kathleen Hicks said in August.

While its funding is uncertain and details vague, Replicator is expected to accelerate hard decisions on what AI tech is mature and trustworthy enough to deploy — including on weaponized systems.

Nov 25, 2023

Can We Build an Artificial Hippocampus?

Posted by in categories: computing, space

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The first 200 of you will get 20% off Brilliant’s annual premium subscription.

My name is Artem, I’m a computational neuroscience student and researcher. In this video we discuss the Tolman-Eichenbaum Machine – a computational model of a hippocampal formation, which unifies memory and spatial navigation under a common framework.

Continue reading “Can We Build an Artificial Hippocampus?” »

Nov 25, 2023

‘What the heck is going on?’ Extremely high-energy particle detected falling to Earth

Posted by in categories: particle physics, space

Astronomers have detected a rare and extremely high-energy particle falling to Earth that is causing bafflement because it is coming from an apparently empty region of space.

The particle, named Amaterasu after the sun goddess in Japanese mythology, is one of the highest-energy cosmic rays ever detected.

Nov 25, 2023

From IAC-The Institute of Astrophysics of the Canary Islands [Instituto de Astrofísica de Canarias] (ES): “Astronomers find the key for detecting the largest structures in the early universe”

Posted by in categories: physics, space

From IAC-The Institute of Astrophysics of the Canary Islands [Instituto de Astrofísica de Canarias] (ES)

11.21.23 Helmut Dannerbauer [email protected].

1
Artist’s impression of a protocluster of galaxies in the early Universe showing galaxies forming new stars and interacting with each other. Credit: M. Kornmesser/ESO.

Nov 25, 2023

Canadian astronaut Joshua Kutryk to head to the International Space Station

Posted by in category: space

“I’m proud to be a crew member on this mission, but especially to be participating as a Canadian astronaut,” Kutryk said. “I’m proud that our country continues to play a leading role in space. It’s very important for our country.”

But that isn’t all for our Canadian astronauts.

The CSA also announced that Jenni Gibbons will be Jeremy Hansen’s back-up for the Artemis II mission.

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