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Topics	Replies	Views	Last post
Physics, Astronomy & Cosmology \ Does gravity attract masses in space, or does it curve space between them? Started by Alan McDougall	101	22093	Last post by PmbPhy 27/05/2020 04:59:52
New Theories \ Is there an aether theory suitable as an alternative to BBT/inflation? Started by MichaelMD	57	16617	Last post by MichaelMD 16/10/2018 01:53:14
New Theories \ Does a particle's weight increase with speed? More on relativistic mass. Started by jerrygg38	6	2084	Last post by mad aetherist 15/10/2018 05:36:51
New Theories \ Alternative discussion - why is the speed of light independent of inertial frames of reference? Started by JohnDuffield	44	6812	Last post by mad aetherist 15/10/2018 01:40:36
Physics, Astronomy & Cosmology \ Why can't light penetrate the event horizon? Started by Mike Gale	287	38242	Last post by Mike Gale 23/04/2017 00:59:32
Physics, Astronomy & Cosmology \ Does gravity increase relativistic mass? Started by jeffreyH	37	4543	Last post by jeffreyH 29/03/2017 19:17:26
New Theories \ What is the difference between gravity potential, and gravity potential energy? Started by timey	184	17163	Last post by timey 28/03/2017 12:26:16
New Theories \ Re: Where does the kinetic energy go? Started by JohnDuffield	37	4609	Last post by GoC 19/03/2017 19:51:29
Physics, Astronomy & Cosmology \ How would a particle accelerate in a gravitational field? Started by jeffreyH	5	1287	Last post by jeffreyH 18/03/2017 17:43:42
Physics, Astronomy & Cosmology \ Does a photon have inertia? Started by jeffreyH	35	5837	Last post by jeffreyH 12/03/2017 14:10:43
New Theories \ Re: Does a photon have inertia? Started by JohnDuffield	11	2389	Last post by GoC 08/03/2017 12:00:15
Physics, Astronomy & Cosmology \ Where does the kinetic energy go? Started by jeffreyH	53	7946	Last post by alancalverd 04/03/2017 08:32:52
Physics, Astronomy & Cosmology \ Does the apple fall to the floor, or does the floor rise to meet the apple? Started by chris	40	14249	Last post by yor_on 09/02/2017 20:27:44
Physics, Astronomy & Cosmology \ Can an observer ever experience superluminal speeds? Started by jeffreyH	18	8123	Last post by tkadm30 13/12/2016 00:11:43
New Theories \ Can mass be negative? Started by Courier of darkness	80	31379	Last post by Ethos_ 23/08/2016 16:46:23
Physics, Astronomy & Cosmology \ could expansion of the universe be a relaxation of the vacuum? Started by jeffreyH	12	3070	Last post by jeffreyH 31/07/2016 11:09:53
Physics, Astronomy & Cosmology \ Does a particle's weight increase with speed? More on relativistic mass. Started by PmbPhy	29	8131	Last post by CPT ArkAngel 28/07/2016 18:25:07
Physics, Astronomy & Cosmology \ Why don't an atom's electrons fall into the nucleus and stick to the protons? Started by 0	415	232234	Last post by puppypower 25/07/2016 12:32:39
New Theories \ Why is the speed of light independent from all other frames of reference? Started by mmfiore	37	9551	Last post by mmfiore 11/07/2016 17:08:05
Physics, Astronomy & Cosmology \ If you were in space without any protection what would kill you first? Started by thedoc	1	1667	Last post by JohnDuffield 07/07/2016 14:17:36