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Artemis 2 launch - humans return to the Moon after 54 years
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2
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57
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3K
Stargazing Astronomy: Orbit Terminology
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5
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156
Undergrad Understanding the Coriolis force
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5
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855
Undergrad I don't understand Dedekind cuts
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9
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427
Star Wars Galaxy map just dropped
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0
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65
Is A.I. more than the sum of its parts?
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14
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404
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11K
Graduate Diodes and low grade thermal energy harvesting
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2
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100
Graduate Exploring Implicit Assumptions and Foundations of Quantum Mechanics
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2
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196
Undergrad DH Mt Bike - Optimizing Drop Landing Ramp Profile
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2
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36
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Admissions Could anyone offer some advice on my college choice for Physics/Astro?
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228
  • Featured
A.I. - Human Job Replacement
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3
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87
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11K
Collection of Lame Jokes
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800
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24K
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2M
Undergrad Live data from Artemis 2?
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113
Graduate The wrong turn of string theory: our world is SUSY at low energies
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Why can’t we observe all regions of the universe?
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3
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353
Equal heat added to two spheres: why is the hanging sphere hotter?
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2
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110
Wordle Lovers - Play the NYT Daily Game
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277
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264K
High School Dark energy might not be constant after all
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8
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4K
  • Poll Poll
Will anyone alive today see a permanent colony on the Moon or Mars?
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3K
High School Gravitons/Gravity passing through objects
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616
Random Photos
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179K
Undergrad What is the proof of the Σqᵢcosθᵢ = constant theorem for colinear charges?
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297
Undergrad Finding the minimum distance between two curves
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Programming Jokes: Lame, Science & Math Jokes!
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Share Animal Pictures: For Animal Lovers
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277K
Does memory follow classical or quantum methods?
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4
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271
Graduate Towards a purely gravitational effective theory of dark matter
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21
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Undergrad Geodesics in quantum gravity Missing Link
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6
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420
Undergrad Is Gravi-GUT a candidate theory of everything?
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20
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4K
Slalom Ski Racing
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1
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165
Anthony Leggett obituary
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2
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272
Dr. Leila Denmark
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301
Graduate What are the most fundamental entities in the SM and QFT?
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6
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Graduate "GR from RG" (dynamical gravity from renormalization group flow)
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516
Graduate Photon dilemma for MOND-like dark matter
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Undergrad All possible models to explain the hierarchy problem?
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Interpreting VIA PCB through TDR and TDT
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746
Undergrad Spinor calculus
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Undergrad Relativistic Uniform Circular Motion
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15
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691
  • Poll Poll
Possibility of spellcheck feature?
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17
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841
Kitten Lovers: Cuteness Overload
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130
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588K
A philosopher who challenges the basics and their assumptions
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195
Undergrad What are the speed limits of a maglev track?
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614
Undergrad Is Prof. Claus Kiefer's application of Gödel (+ infinity) justified?
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248
Undergrad Why is gravity a fictitious force?
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3
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Undergrad Black hole questions
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608
Undergrad KE of rotating disc
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3
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Collection of Science Jokes P2
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136
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457K
Stargazing Solar Activity and Space Weather Update thread
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Marcus Jensen
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170
Engineering Half wave voltage doubler
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15
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1K
Today I Learned
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231
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Undergrad Curl of velocity vector in rotational motion
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Undergrad Large Synoptic Survey Telescope -> Vera C. Rubin Observatory
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15
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Help with problem in MIT open course general relativity
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Do old CRT and O-scopes degrade to emit harmful X Rays?
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Undergrad How does this configuration not create E field inside the conductor?
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265
Chemistry Why percent yield is sometimes less than 100% in chemistry experiments?
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6
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Solve the given second order differential equation
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Graduate Sidney Coleman's opinion on interpretation in his Dirac lecture
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We needed a backstory for our Traveller sci-fi RPG ...
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The Secrets of Prof. Verschure's Rosetta Stones
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6
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Random Thoughts 7
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High School Can alpha radiation make other materials radioactive?
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Geiger Counter Question
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22
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858
Union Micro-Macro
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196
History Biographies, History, Philosophy of Physics
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  • Sticky
Our Beautiful Universe - Photos and Videos
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Classical Self studying Taylor's Classical Mechanics
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10
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580
First Time Here!
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2
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149
High School Abel Prize awarded, 2026, to Gerd Faltings
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691
Pre-reqs for Ultrafast Optics? (Jackson or Zangwill for Electrodynamics?)
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Cover songs versus the original track, which ones are better?
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Warning: Bad actors may already be in store-now-decrypt-later mode
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Molds in Front Loading Washing Machine
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What should sit beside a physics equation?
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5
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361
April Fool's Physics Papers 2026
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Graduate Linearization of the Navier–Stokes equations for real airflow conditions
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322
Whatever happened to Evo?
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6
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871
Controlled (Thyristor) Three-Phase Full-Wave Rectifiers in LTspice
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375
Are these rabbit pellets???
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16
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  • Sticky
Space Stuff and Launch Info
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55
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178K
The James Webb Space Telescope
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19
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Big Ben In N Dimensions
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2K
Talent Worthy of Wider Recognition
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5
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12K
Extreme Ecology On Christmas Island
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3
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462
Undergrad What causes knots and stress when untwisting ropes?
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8
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3K
Q-Day: When Quantum Computers can Factor ultra-large numbers in a few...
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2
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High School What is "motion theory?"
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3
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322
Hello fellow explorers !!
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154
HS Physics Teacher looking for support
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4
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438
Voyager 1: order-of-magnitude cross-track drift and speed loss over the next 100–1000 years
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1K
Heaviest Rockin' Groove Ever?
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1
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132
Music I Should Like But Don't
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2
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199
Undergrad Simulated motion of an oblate and prolate spinning spheroid
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0
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221
Construction of a model of a hydraulic damper
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21
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Rush Redux 2026
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4
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506
Graduate RIP Chen Ning Yang (1922-2025)
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introduction
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6
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221
  • Poll Poll
Request for a new History of Science subforum
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2
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44
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2K