Tag: space-time

29 Does matter accumulate just outside the event horizon of a black hole? 2014-05-14T17:27:41.100

24 Age of the universe and time dilation 2014-10-05T14:21:37.343

20 Why is the observable Universe larger than its age would suggest? 2013-11-24T15:48:08.387

17 By putting a mirror in space, would we be able to see into the past? 2014-01-14T20:21:30.870

15 What is a singularity? What is at the center of a black hole? Specifically regarding space-time 2014-04-23T01:10:08.957

14 What is the difference between our time and space time? 2014-01-15T03:29:04.210

14 Time according to the gravity of Sagittarius A? 2015-04-14T04:49:54.787

10 Is there anything special about our position in the galaxy thats necessary for life? 2014-02-01T13:17:45.387

10 Would time go by infinitely fast when crossing the event horizon of a black hole? 2014-05-23T16:08:34.213

9 Spinning black hole vs non spinning black hole 2016-02-12T08:44:22.700

9 How does the concept of a universe with no center work? 2016-03-04T02:17:26.683

8 Does the accelerating expansion of spacetime mean that the pace of time is changing? 2016-02-28T04:25:01.473

8 What Types of Radiation Emanate in the Future and are Perceived in the Present? 2017-02-15T16:32:30.033

7 What it would look like to observe people with a different time flows? 2014-12-04T13:40:57.640

6 Why Do Planets Revolve Faster When they Are Closer to Their Parent Star? 2013-10-07T19:47:48.063

6 Can it be inferred that our cosmological horizon has increased over time? 2013-11-02T08:20:19.973

6 When we say a galaxy is 200 million light years away, does this account for the expansion of space in the time it took it's light to reach us? 2014-01-09T20:45:06.780

6 Why do we have the cosmological constant? 2014-01-09T21:07:36.150

6 Our universe the surface of a 4-dimensional sphere? 2014-04-16T00:28:52.503

6 What shape are black holes theorized to be? 2014-05-01T03:20:29.037

6 Can Space-Time Itself Have Energy Qualities Like Momentum? 2014-05-24T14:06:21.940

6 Is there an objective difference between space expansion and reduction in speed of light 2016-02-01T20:52:15.533

6 What is spacetime 'made' of? 2016-02-04T10:01:03.520

6 Gravitational eddies across the galaxy? 2018-02-15T22:07:08.507

5 Why does time get slow near a black hole? 2014-03-17T18:44:47.303

5 Questions about time and space (from beginner) 2014-04-20T18:31:44.397

5 What is the relative time difference between us and a star system in outer layer of our galaxy? 2014-08-29T03:37:51.337

5 Can a black hole rip spacetime 2016-02-12T07:56:02.263

5 Distinction between metric expansion and objects just moving apart from each other? 2016-02-26T18:49:46.237

5 When black holes such as those detected by LIGO merge, in what ways does the Schwarzschild Radius warp? 2016-03-03T14:25:39.737

5 What effect does time dilation have on bodies orbiting close to Black Holes? 2017-02-27T11:05:42.550

5 If the density of nebular distribution increases symmetrically in all directions, how does space curvature explain it? 2017-04-28T14:05:51.570

4 Time dilation on an object circling earth 2014-01-25T18:42:30.900

4 Einstein General relativity and bending of space 2014-04-08T04:19:01.950

4 What is gravity really? 2014-06-23T01:50:30.670

4 Perception of an objects history passing as an observer moves toward it 2014-07-24T07:29:52.387

4 How would Special relativity explain past-present-future if thinking about 13-billion-light-years distanced objects 2014-10-27T04:07:33.740

4 time on earth compared to completely stationary in space 2014-10-31T17:51:31.457

4 When you travel fast around a black hole, do you experience high speed yourself? 2016-02-23T10:55:52.587

4 Why is space and time spoken of as one thing 2016-03-15T02:47:30.830

4 How does an absolute horizon form before the apparent horizon? 2016-04-02T17:24:39.897

4 What is the actual black hole merger speed? 2018-06-29T20:01:18.623

4 Does Time Exist for Photons? 2018-08-03T13:51:39.010

3 What is the Exact time earth takes to revolve around its axis 2013-12-27T07:26:27.440

3 Taking Advantage of Time Dilation 2014-05-21T13:40:29.173

3 World line coordinate finiteness 2014-08-27T16:35:44.880

3 Why does the distance between Sun and Earth stay the same? 2014-12-02T17:21:43.113

3 Can we see Earth by looking into space? 2015-07-20T17:39:33.673

3 Does time slow down because the universe is expanding at an accelerating rate? 2015-11-05T08:23:04.000

3 Does spacetime return to being flat? 2015-12-10T04:23:06.963

3 Why can't gravity repel things? 2015-12-15T03:32:04.123

3 Center of the universe 2016-01-03T19:08:20.443

3 How could we tell if the Universe is infinite? 2016-03-04T04:33:59.173

3 How long would it take to reach the edge of the reachable universe? 2016-04-16T14:34:04.717

3 How could universe inflate itself out of the very dense and curved early spacetime? Could it happen in a black hole too? 2016-06-01T14:33:39.380

3 Theoretically could the expansion of the universe affect acceleration due to gravity? 2016-06-09T01:42:46.940

3 Is time taken into account by astronomers when creating and using maps of the universe? 2016-06-14T12:19:03.330

3 In layman's terms, why do we put the "time" in space-time? 2016-11-07T17:52:25.693

3 Why does disorder (entropy) increase in the same direction of time as that in which the universe expands? 2016-11-08T15:13:18.617

3 Total mass of light? 2017-05-06T17:37:50.897

3 Are wormholes even possible? 2017-08-27T00:43:40.357

3 Knowing time any where and any when 2017-09-26T23:09:38.810

3 Why do we use the Planck length? 2018-10-11T13:08:34.293

3 How is distance in light-years converted to years back in time? 2018-10-30T03:16:42.687

2 How often do stars form? 2014-05-07T07:40:04.433

2 A day in earth, a thousand years somewhere else 2014-05-16T20:04:14.110

2 Why doesn't this paradox disprove (some) multiverse quantum gravitational theories? 2014-07-02T08:54:53.120

2 How is space-time bent by black holes? 2014-08-14T09:04:10.720

2 Do astronomers, in principle, have more information about older phenomena than younger? 2015-03-30T19:41:51.643

2 nasaworking on a way to travel faster than speed of light 2015-10-27T13:13:10.327

2 A universal reference point 2015-10-28T04:49:31.770

2 Does all of time exist and if so where is it? 2015-11-08T04:15:15.880

2 Is time itself speeding up universally? 2015-11-23T06:42:02.963

2 A camera and time dilation? 2015-12-29T05:32:14.147

2 When I read that a system is located x light years away, why is there no direction? 2016-01-07T01:49:31.407

2 Measuring time and distance in space 2016-02-12T07:08:22.450

2 What are the dimensions of LIGO Detector evacuated chambers? 2016-03-03T16:52:40.193

2 Is there mass i.e a physical bottom to a black hole? 2016-09-05T08:03:31.037

2 Do black holes pull in and keep spacetime itself or merely warp it but ultimately let it pass through? 2016-09-20T15:24:50.500

2 Gravitational waves 2017-02-08T15:29:38.057

2 What is length of the universe on lights perspective 2017-02-18T02:59:12.943

2 Canvas and bowling ball 2017-12-04T22:00:18.227

2 Is it correct to assume that the relationship between an objects mass and size, is what decides if it’s a black hole or not? 2017-12-22T10:25:05.667

2 do rockets follow a straight path but is looks curved because of space time? 2018-01-16T19:43:24.333

2 Is the shape of observable universe and shape of space same? 2018-03-16T16:36:40.470

2 How well is Earth’s motion through the universe quantified? 2018-04-04T16:32:18.053

2 What exactly is the cosmic definition of ‘now’ is? 2018-09-20T16:07:17.810

2 How to compare the observation with the theoretically predicted result? 2018-10-16T11:12:28.793

1 traveling past the speed of light 2014-02-03T11:25:59.923

1 the length of second, minute or hour, what defines the time of exo planetary bodies 2014-08-18T05:32:55.380

1 The multiverse spacetime paradox? 2014-12-27T11:45:41.800

1 How was all the matter curled up inside a singularity during big bang ? 2015-04-13T07:01:17.573

1 Why does Earth have more gravitational force than the Moon if I stand on it? 2015-04-14T02:46:44.257

1 Is the time lapse considered when estimating the age of the universe? 2015-10-19T16:42:38.867

1 Could the Earth use gravitational lensing / bending of light to see it's own bottom? 2015-11-06T02:59:34.427

1 What caused gravitational waves detected by LIGO? 2016-02-13T07:30:56.267

1 Local Standard Time Meridian - LSTM (Units) 2016-03-02T03:11:24.017

1 Initially non-flat space-time makes dark matter obsolete$\dots$ 2016-03-24T21:10:40.127

1 Could the Sun's bending of light be measured on photographic plates before Einstein's prediction? 2016-03-25T08:06:24.990