An extraordinarily rare, gravitationally lensed supernova may offer a powerful new way to measure the universe’s expansion rate.
Category: cosmology
Interstellar Colonization Compendium
Space is huge, immense beyond our wildest dreams. In order to explore and settle it, we’ll need to learn to dream a lot bigger and bolder than ever before.
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/ discord Credits: Interstellar Colonization Compendium Episode 455; July 11, 2024 Produced & Written: Isaac Arthur Narrated by: Isaac Arthur & Sarah Fowler Arthur Editor: Donagh Broderick Graphics: Apogii.uk Bryan Versteeg Fishy Tree Jarred Eagley Jeremy Jozwik Katie Byrne Ken York YD Visual LegionTech Studios Mafic Studios Mark O’Bannon Rapid Thrash Sergio Botero Tactical Blob Udo Schroeter Select imagery/video supplied by Getty Images Music Courtesy of Epidemic Sound http://epidemicsound.com/creator Lombus, “Cosmic Soup” Markus Junnikkala, “A Memory Of Earth” Miguel Johnson, “So Many Stars” Sergey Cheremisinov, “Sirius”, “Labyrinth”, “Seven Lights” Stellardrone, “In Time”, “Eternity”, “Red Giant”, “The Divine Cosmos” Tara Harkavyi, “Alpha and…” 0:00:00 Intro 0:02:43 Table of Contents 0:04:27 Motivations 0:06:03 Exploration 0:07:43 Population Growth 0:13:12 Resources 0:14:53 Long Term Safety 0:16:20 Escape 0:19:30 Funding & Investment 0:26:32 Spaceship Drives 0:32:08 Ion Drive 0:33:49 Orion Drive 0:34:46 Fusion Drive 0:37:15 Black Hole Drive 0:38:53 Beaming Systems 0:43:09 Ship Types 0:45:26 Faster Than Light Ships 0:46:49 Micro-Jump Ships 0:49:49 Generation Ships 0:59:09 Sleeper Ships 1:05:17 Methuselah Ships 1:10:25 Gardener Ships 1:15:58 Von Neumann Probes 1:18:42 Seed Ships 1:22:18 Data Ships 1:24:29 Ship Shape & Collisions 1:27:22 Collector Ships 1:30:25 Planet Ships 1:32:09 Hybrid Ships 1:34:05 Colonization Strategies 1:35:25 Lowest Hanging Fruit 1:37:58 Percolation Theory 1:40:28 Backfilling Systems 1:42:05 Closest Available System 1:44:31 Crawlonizing 1:49:14 Gardener Chains & Cones 1:51:03 Automated Vanguard 1:54:12 Central Collection 1:55:29 FTL & Multiverse Strategies 1:57:53 Early Settlement 1:59:07 Planets vs Moons 2:00:44 Aurora Effect 2:03:03 Orbital Infrastructure 2:04:42 Getting Neighbors 2:07:16 Solar Economy 2:08:19 Sending Out New Arks 2:10:40 Sponsor 2:11:58 Schedule 2:12:56 Outro.
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Credits:
Interstellar Colonization Compendium.
Episode 455; July 11, 2024
Produced & Written: Isaac Arthur.
Narrated by: Isaac Arthur & Sarah Fowler Arthur.
Editor: Donagh Broderick.
Graphics:
Apogii.uk.
Bryan Versteeg.
Fishy Tree.
Jarred Eagley.
Jeremy Jozwik.
Katie Byrne.
Ken York YD Visual.
LegionTech Studios.
Mafic Studios.
Mark O’Bannon.
Rapid Thrash.
Sergio Botero.
Tactical Blob.
Udo Schroeter.
Select imagery/video supplied by Getty Images.
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator.
Lombus, \
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Why Reality Is Just Information | Leonard Susskind
Have you ever felt like the world around you isn’t exactly… “real”? Modern physics is starting to suggest something incredible: The universe isn’t made of atoms, energy, or particles. It is made of Information. In this video, we explore the radical “It from Bit” theory and the Holographic Principle. From the mysterious paradoxes of Black Holes and Hawking Radiation to the way quantum entanglement might actually create the fabric of space and time, we dive deep into the mind-bending reality of quantum mechanics. In this video, we cover: Why Stephen Hawking conceded the Black Hole Information Paradox. The Ryu-Takayanagi formula: How entanglement builds geometry. Why 3D space might just be a 2D holographic projection. The “It from Bit” philosophy by John Wheeler. How consciousness relates to Integrated Information Theory (IIT). If reality is just a pattern of qubits in a vast Hilbert space, what does that make us? Join us as we deconstruct the material world and look at the “source code” of the universe. #QuantumPhysics #HolographicUniverse #ItFromBit #TheoreticalPhysics #ScienceDocumentary #SpaceTime #quantuminformation
BREAKING: A Dark Mysterious Force Just Ripped Across the Milky Way
A viral post claimed that a mysterious force passed through the Milky Way without light or warning. But what are astronomers actually observing? In this video, we break down the real science behind high-velocity gas clouds, dark matter halos, and how our galaxy continues to evolve.
Chapters:
00:00 Introduction.
00:51 DISCOVERY
03:05 SCIENTIFIC IMPORTANCE & THEORIES
05:32 IMPLICATIONS & WHAT’S NEXT
08:15 Outro.
08:39 Enjoy.
MUSIC TITLE : Starlight Harmonies.
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Finally Released! The James Webb Telescope Has Found The Object That Holds Our Universe Together
#jameswebbspacetelescope #jwst.
Finally Released! The James Webb Telescope Has Found The Object That Holds Our Universe Together.
Containing nearly 800,000 galaxies, this image from NASA’s James Webb Space Telescope is overlaid with a map of dark matter, represented in blue. Researchers used Webb data to find the invisible substance via its gravitational influence on regular matter.
You see, Scientists using data from NASA’s James Webb Space Telescope have made one of the most detailed, high-resolution maps of dark matter ever produced. It shows how the invisible, ghostly material overlaps and intertwines with “regular” matter, the stuff that makes up stars, galaxies, and everything we can see.
Published Monday, Jan. 26, in Nature Astronomy, the map builds on previous research to provide additional confirmation and new details about how dark matter has shaped the universe on the largest scales — galaxy clusters millions of light-years across — that ultimately give rise to galaxies, stars, and planets like Earth.
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Comments on the Hartle-Hawking state and observers — Ying Zhao
Workshop on quantum aspects of black holes and spacetime.
Topic: Comments on the Hartle-Hawking state and observers.
Speaker: Ying Zhao.
Affiliation: Massachusetts Institute of Technology.
Date: December 3, 2025
Wolfensohn Hall.
It was argued that any fixed holographic theory contains only one closed universe state and hence fails to give semi-classical physics. It was proposed that this problem can be resolved by including a classical observer living inside the universe. Earlier works focused on closed universes connected with asymptotic Euclidean boundaries. In this talk we examine the case of Hartle-Hawking state where the dominant Euclidean topology is a sphere. We show that different features emerge. We comment on the potential implications for the understanding of de Sitter space. Based on work with Daniel Harlow.
UNBELIEVABLE! JWST Just Found the Earliest Supernova in History
Astronomers using the James Webb Space Telescope have confirmed the earliest supernova ever observed, linked to the gamma-ray burst GRB 250314A. The explosion occurred when the universe was just 730 million years old and looks surprisingly similar to modern supernovae, offering new insight into how the first massive stars lived and died.
Paperlink : https://arxiv.org/abs/2507.
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