CR4 - Blog: Relativity and Cosmology

10/04/2020 6:10 AM Pesky Ellipse Circumference

by Jorrie

Pathfinder Tags: circumference ellipse perimeter

Last post: 11/30/2020 12:03 PM

by Haymaker

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410

08/24/2020 7:15 AM SpaceProperTime Diagrams and the Central Singularity

by Jorrie

Pathfinder Tags: einstein general relativity

Last post: 08/25/2020 10:56 AM

by Jorrie

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289

08/17/2020 3:00 AM SPT-Acceleration and the Equivalence Principle

by Jorrie

Last post: 08/18/2020 12:13 PM

by Jorrie

8

171

08/11/2020 12:00 AM Space-Propertime Structure and Acceleration II

by Jorrie

Pathfinder Tags: acceleration Propertime spacetime

Last post: 08/18/2020 10:38 AM

by canadianslidewinder

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183

08/07/2020 5:00 AM Space-Propertime Structure and Acceleration

by Jorrie

Pathfinder Tags: Propertime spacetime

Last post: 08/08/2020 2:13 PM

by Jorrie

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226

08/04/2020 6:00 PM Spacetime Structure

by Jorrie

Pathfinder Tags: Minkowski Propertime Spacetime Structure

Last post: 08/12/2020 5:36 AM

by Just an Engineer

8

153

07/23/2020 6:00 PM Roger Penrose and Conformal Cyclic Cosmology

by Jorrie

Pathfinder Tags: conformal cosmology cosmology cyclic universe penrose

Last post: 07/29/2020 3:06 AM

by Jorrie

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04/11/2016 7:00 AM Another Relativity "Paradox"

by Jorrie

Pathfinder Tags: acceleration relativity

Last post: 01/28/2017 6:26 AM

by Erik Nelson

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1930

03/27/2016 11:00 PM Time Dilation and Lorentz Contraction Revisited

by Jorrie

Pathfinder Tags: Lorentz contraction Velocity time dilation

Last post: 08/18/2016 10:43 AM

by ralfcis

130

2013

06/30/2015 6:00 PM How Zeons turned into something Useful

by Jorrie

Last post: 06/30/2015 6:00 PM

by Jorrie

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670

05/12/2015 12:00 PM How Aeons turned into Zeons

by Jorrie

Pathfinder Tags: cosmological constant cosmology expansion

Last post: 05/12/2015 12:00 PM

by Jorrie

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01/17/2015 1:55 AM HTRN's Cosmology Questions

by Jorrie

Pathfinder Tags: cosmological constant cosmology expansion

Last post: 01/28/2017 6:47 AM

by Erik Nelson

17

542

11/30/2014 6:00 PM Heavyweights Flexing BICEP Muscles

by Jorrie

Pathfinder Tags: cosmology Cyclic model inflation

Last post: 12/01/2014 8:03 AM

by Anonymous Hero

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422

09/23/2014 12:49 PM Galactic Puzzle (take 2)

by Jorrie

Pathfinder Tags: Expansion rate Hubble flow

Last post: 09/25/2014 12:48 PM

by dkwarner

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638

09/23/2014 9:00 AM Galactic Puzzle

by Jorrie

Last post: 09/23/2014 9:00 AM

by Jorrie

0

334

08/28/2014 3:36 AM Do We Live In a White Hole?

by Jorrie

Pathfinder Tags: black hole White hole

Last post: 09/26/2014 12:17 PM

by James Stewart

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08/28/2014 1:20 AM Do We Live Inside a White Hole?

by Jorrie

Pathfinder Tags: black hole White hole

Last post: 08/28/2014 1:20 AM

by Jorrie

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06/13/2013 2:33 PM The One-way Speed of Light Controversy

by Jorrie

Pathfinder Tags: relativity speed of light

Last post: 06/18/2013 1:21 AM

by Jorrie

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12/18/2012 10:00 AM One-way Speed of Light

by Jorrie

Pathfinder Tags: Isotropy of space One-way speed of light

Last post: 01/29/2013 3:32 PM

by Jorrie

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1185

09/18/2012 11:00 AM Cool Cosmo Calculator

by Jorrie

Pathfinder Tags: Cosmocalc CosmoLean Cosmology calculator Hubble radius

Last post: 09/19/2012 10:56 AM

by SolarEagle

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1672

07/23/2012 9:00 AM Our Observable Universe a Transient?

by Jorrie

Pathfinder Tags: cosmology Emergent gravity Emergent space

Last post: 07/25/2012 5:08 PM

by Jorrie

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06/18/2012 10:00 AM Cosmological Calculator Update

by Jorrie

Pathfinder Tags: Cosmo-calculator Cosmological calulator cosmology

Last post: 06/19/2012 11:45 PM

by Jorrie

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06/04/2012 9:00 AM De Sitter Cosmic Model Revival

by Jorrie

Pathfinder Tags: Bounce cosmology cosmology de Sitter

Last post: 06/09/2012 5:24 AM

by Jorrie

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777

05/29/2012 8:00 AM SKA shared between Africa and Australia

by Jorrie

Pathfinder Tags: astronomy cosmology SKA Square kilometer array

Last post: 06/01/2012 4:14 PM

by ss3e55

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647

04/03/2012 11:44 PM Did Opera Spokesperson need to Resign?

by Jorrie

Pathfinder Tags: opera Superluminal Neutrinos

Last post: 04/09/2012 12:30 AM

by Cedar

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1358

01/24/2012 7:40 AM One-way Speed of Light not C?

by Jorrie

Pathfinder Tags: One-way speed of light

Last post: 08/29/2014 10:26 AM

by adreasler

29

1357

01/04/2012 10:00 AM Scotty and Spock's CR4 Session

by Jorrie

Pathfinder Tags: Spacetime interval special relativity Vucan clocks

Last post: 01/14/2012 11:49 PM

by Jorrie

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12/29/2011 1:00 AM Scotty and Spock's Vulcan Clocks

by Jorrie

Pathfinder Tags: puzzle relativity Teaser Time dilation

Last post: 01/14/2012 11:40 PM

by Jorrie

8

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12/14/2011 3:32 AM Higgs Particle Discovered?

by Jorrie

Pathfinder Tags: "God particle" Higgs

Last post: 12/16/2011 6:48 AM

by Jorrie

16

856

11/10/2011 4:00 AM Einstein Clocks and the Sagnac Effect

by Jorrie

Pathfinder Tags: Clock synchronization GPS Sagnac effect

Last post: 11/21/2011 10:53 PM

by Jorrie

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1070

11/03/2011 12:00 AM GPS and Relativity Misconceptions 3

by Jorrie

Pathfinder Tags: GPS relativity Sagnac effect

Last post: 11/04/2011 3:39 PM

by Jorrie

10

507

10/31/2011 5:00 AM GPS and Relativity Misconceptions 2

by Jorrie

Pathfinder Tags: GPS Gravity relativity

Last post: 11/07/2011 1:22 PM

by Anonymous Poster

28

533

10/24/2011 2:17 PM GPS and Relativity Misconceptions 1

by Jorrie

Pathfinder Tags: GPS relativity

Last post: 10/31/2011 2:46 PM

by Jorrie

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10/03/2011 6:00 PM New 'Blast-from-the Past' Record Confirmed

by Jorrie

Pathfinder Tags: astronomy cosmology Gamma Ray Burst

Last post: 10/12/2011 3:09 AM

by Jorrie

4

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09/27/2011 5:08 AM Neutrinos Go Superluminal?

by Jorrie

Pathfinder Tags: CERN speed of light Tachyon

Last post: 02/23/2012 7:02 AM

by Jorrie

176

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06/08/2011 11:00 PM Spacetime Curvature

by Jorrie

Pathfinder Tags: curvature spacetime

Last post: 11/21/2011 10:41 PM

by Jorrie

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05/03/2011 6:00 PM Wiltshire and the Cosmic Bell

by Jorrie

Pathfinder Tags: cosmic expansion hubble

Last post: 12/18/2011 9:05 PM

by Widdekind

30

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04/12/2011 4:00 AM Fractal Hubble Bubbles?

by Jorrie

Pathfinder Tags: cosmology Hubble-bubble

Last post: 12/15/2011 8:23 AM

by Widdekind

30

674

03/10/2011 4:55 AM Equatorial Bulge

by Jorrie

Pathfinder Tags: Equatorial bulge Gravity

Last post: 04/13/2011 1:25 AM

by 34point5

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02/22/2011 12:00 AM Relativistic Two-Body Orbits

by Jorrie

Last post: 02/24/2011 8:49 PM

by George Hatt Jr

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02/14/2011 4:55 AM Two-Body Orbits

by Jorrie

Last post: 02/15/2011 2:59 PM

by Jorrie

3

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02/05/2011 10:00 PM Ekpyrotic Cosmic Balloon

by Jorrie

Last post: 02/11/2011 2:40 PM

by Jorrie

6

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01/26/2011 10:00 PM Colliding Branes Cosmic Model

by Jorrie

Pathfinder Tags: Brane-world cosmology string theory

Last post: 02/04/2011 8:33 AM

by Jorrie

46

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11/29/2010 6:00 AM Orbit Energy Puzzle II

by Jorrie

Pathfinder Tags: Orbit energy puzzle Orbital energy

Last post: 12/05/2010 6:33 AM

by Jorrie

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415

11/23/2010 5:00 AM Orbit Energy Puzzle

by Jorrie

Pathfinder Tags: Orbit energy puzzle

Last post: 11/27/2010 12:52 PM

by StandardsGuy

23

383

10/24/2010 11:00 PM The Cosmic Teardrop

by Jorrie

Pathfinder Tags: Cosmic teardrop ESO Farthest galaxy vlt

Last post: 10/29/2010 11:57 PM

by Anonymous Poster

7

570

10/14/2010 4:00 AM Cosmos now Bigger!

by Jorrie

Pathfinder Tags: Size of the universe WMAP7

Last post: 10/19/2010 12:52 AM

by Jorrie

13

410

10/06/2010 1:00 AM Cosmic 'Dark Flow'

by Jorrie

Pathfinder Tags: dark energy Dark flow dark matter

Last post: 10/14/2010 2:08 AM

by cwarner7_11

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561

08/18/2010 11:00 PM Measuring Cosmic Expansion

by Jorrie

Pathfinder Tags: cosmic expansion Redshift

Last post: 08/26/2010 8:12 PM

by Transcendian

6

540

08/04/2010 11:00 PM Dark Energy Superfluous?

by Jorrie

Pathfinder Tags: cosmology dark energy

Last post: 09/04/2012 8:15 AM

by Jorrie

45

672

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