59 Why can't spaceships go underwater? 2018-03-05T21:19:35.070

46 Could you claim a space station as a country? 2015-08-24T13:31:28.287

35 What would a space fighter look like? 2015-03-20T12:34:18.450

35 Can I build a space elevator from superman's hair? 2015-05-19T10:07:01.373

34 Dyson sphere with mirrors 2017-06-06T06:50:08.400

33 How are there so many species on the space station 'A long way from anywhere V'? 2016-12-19T11:43:18.733

33 How big could an alien-made object on the far side of the moon become so that discovery still can only happen by accident? 2017-04-24T18:18:40.920

32 If we can have "all the comforts of home" in space why would we settle planets? 2018-08-12T11:35:51.043

30 Is Asteroid Harvesting economic? 2014-12-08T17:39:50.343

29 Can we stay healthy if we experience microgravity for 8 hours every day? 2018-04-25T12:17:36.657

29 How deep must be a pit on the moon to hold atmosphere at 1ATM on the bottom 2019-01-02T17:08:48.907

28 How would we build Earth Mark II? 2015-01-29T20:05:39.573

27 Building the Death Star with today's tech 2014-11-02T04:07:40.370

27 What is a Dyson Sphere around a planet called? 2016-02-02T18:54:18.470

26 What measures to put in place to reduce airlock being used for murder? 2020-01-01T10:01:34.417

25 Reformatting Death Stars as powerful telescopes 2015-01-08T06:48:56.120

25 What are the feasible means of keeping a space station existing and operational for thousands of years? 2017-05-21T03:45:14.993

24 What minimal radius is needed for rotation to simulate gravitation without adverse effects on humans? 2014-10-11T09:01:58.927

24 Are there any benefits to a large body of water in a space habitat? 2018-02-09T07:17:01.530

23 How can I prevent Kessler Syndrome among space stations? 2016-12-08T16:21:16.363

22 How to protect a space elevator against terrorism 2015-07-10T09:20:13.320

22 Severed Space Elevator 2017-02-14T16:06:04.500

21 What technologies and sciences are needed to detect a star going supernova? 2015-01-04T11:09:52.370

21 How big would a satellite need to be to block out the sun? 2018-01-17T07:42:33.133

20 Where to Anchor My Space Elevator 2015-01-17T04:15:34.203

20 That's no moon! It's a space station! How big can a space ship be before it collapses on itself? 2015-10-07T20:59:20.297

20 What is the best design for docking onto a rotating space-station? 2018-12-21T20:54:04.490

20 The mass of an economically feasible non-microscopic traversable wormhole 2019-01-20T17:53:45.730

19 How would a planet-sized computer power receive power? 2016-10-17T04:40:08.480

19 Is it possible to build a bridge between planets? 2016-12-17T12:30:00.623

18 How much stuff could we get into Earth orbit for the start-up cost of initiating asteroid mining? 2014-11-11T10:06:23.510

18 Would Space Voids be good building for massive space stations? 2016-08-04T06:13:33.563

17 How would long-term exposure to artificial gravity (as generated by a Stanford torus) affect human evolution? 2014-11-14T12:09:57.657

17 How would I transport an atmosphere? 2015-02-18T22:08:08.127

17 How large would an orbiting structure have to be to be largely unexplored after 100 years? 2016-04-15T12:17:08.923

17 What would an asteroid base look like and how would it operate? 2016-08-19T08:46:55.243

17 Would space mines really work? 2016-09-21T07:40:09.207

17 How would the lifts work on a space station which worries about hull breaches? 2017-11-14T10:13:37.247

16 Is it believable having a space industry constantly exporting resources from Earth to space colonies eventually leading to a conflict between the two? 2014-11-11T08:32:37.147

16 Humanity’s first effort at moving a planet 2017-05-08T04:38:07.143

16 What's wrong with moving cables for a Space Elevator? 2017-08-22T13:25:14.697

15 Is Asteroid Mining safe? 2014-12-10T16:09:32.603

15 Buying Jupiter for the price of a space station 2015-04-24T10:31:07.967

15 Placement of redundant containment systems? 2018-01-02T22:41:58.043

15 What would happen to air flow and fires in an O'Neill cylinder? 2019-06-05T14:45:47.217

14 Would gravity be constant inside a Bernal sphere? 2014-10-09T11:11:24.390

14 Space station mass per person 2014-11-21T13:58:09.277

14 Building a (solid) ring around the earth 2014-12-19T12:20:54.090

14 How big would a "Ring World" have to be to orbit a black hole? 2015-01-14T18:22:23.200

14 Radiation shielding for a space ship 2015-03-10T19:48:43.140

14 How would a solid shell surrounding Earth affect the climate? 2016-08-23T20:02:48.780

14 Boarding weapons in space 2017-04-21T14:43:25.447

13 Where should I place my city in space? 2015-02-12T16:37:46.700

13 Way to block rockets from entering space? 2016-08-03T01:41:08.327

13 How could two alternate realities "blend" at a single point in space time? 2018-02-12T17:58:07.273

13 Microgravity BBQ setup 2018-04-20T20:48:59.733

13 Prevailing winds on a rotating space habitat 2018-07-31T22:04:09.033

13 How fast would a Martian space elevator travel? 2018-08-14T04:34:32.580

12 What would the weather be like in an asteroid habitat? 2014-10-27T20:57:42.360

12 What would a pair of Death Stars do to Earth? 2014-11-23T19:21:52.613

12 Metal foam for stopping meteorites? 2016-04-11T17:21:35.797

12 Would decreasing the diameter of an orbital ring create artificial gravity? 2017-07-10T16:03:28.910

12 Stabilizing a McKendree Cylinder Habitat 2017-08-29T22:04:04.013

12 Would Rayleigh scattering (blue skies) be noticeable in an O'Neill cylinder? 2018-09-28T21:38:08.007

11 Orbital construction: How to get around some of its problems? 2016-01-21T17:16:31.163

11 Klemperer rosette vs Relativistic Kill Vehicles 2016-05-13T15:17:36.407

11 What weapon would be most effective for orbital bombardment? 2016-08-05T21:40:48.920

11 What would happen to a man-made orbital ring/belt, if a portion of it was destroyed? 2017-07-10T13:50:30.527

11 What conditions would make rain possible in an O'Neill Cylinder? 2017-11-30T19:13:13.463

11 Would the rotation of the starfield from a ring station be too disorienting? 2019-05-07T21:02:50.720

11 Life on the Broken Ring - an issue of size 2019-06-26T18:56:25.547

10 Is my space station feasible? 2016-07-30T23:02:47.647

10 Electric Universe: can an object be pinned at a solar pole with magnetic flux? 2017-03-07T18:57:27.167

10 Excuses to move my "space city" to an aerostat? 2017-05-27T17:15:41.510

10 Space station debris 2017-08-10T20:36:27.397

10 How to design a zero-g nuclear reactor? 2017-08-29T08:13:08.853

10 Feasibility of coilgun system for sub-luminar interplanetary transport 2017-12-04T08:07:12.640

10 Hurricane-force winds or gentle breezes in an O'Neill Cylinder? 2019-10-24T17:10:24.677

9 Economic and geopolitical effects of building a space elevator? 2014-12-01T04:44:48.290

9 Designing cities inside a hollowed-out asteroids 2015-04-11T00:53:48.633

9 Farming in Space: SHEEP 2015-09-29T11:02:01.310

9 Can we build a space elevator on the Moon with present technology? 2015-09-29T12:46:50.673

9 What would a ship with an Alcubierre Drive look like? 2016-02-09T09:17:09.393

9 Is helium 3 lucrative enough to justify the mining of the moon? 2016-03-08T01:14:48.180

9 What evolutional adaptations would animals develop in microgravity? 2016-07-04T08:03:04.300

9 Can I have wind turbines on my base? 2018-08-29T12:07:36.117

9 Is this station design likely to cause balance or vertigo issues? 2018-12-19T20:02:13.337

9 Are fly wheels a valid means of energy storage for powering a large space station? 2018-12-21T17:29:59.840

9 Is it possible to make Asteroid Concrete? 2019-02-15T16:26:23.890

9 Could we build a massive “Ark” type space station with current technology? 2019-05-15T04:33:37.063

9 Vertical cyclones in a rotating space habitat 2019-06-06T18:30:23.187

8 How could a civilization trigger star formation? 2015-01-21T16:15:31.260

8 Laser-boosted Solar Sails to 61 Virginis? 2016-03-30T19:04:17.267

8 Can a space station settlement orbit the sun? 2016-07-06T23:30:05.297

8 What is required to make a Dyson Tree a feasible space habitat? 2016-07-27T19:28:19.000

8 What density can I set for Uium, to be reshaped by moon-mass black/white holes 2016-12-20T09:07:05.640

8 What would an observer, standing on the Earth, notice if the base of a Space Elevator was severed? 2017-02-15T20:25:57.723

8 What happens to the leftovers from asteroid mining? 2017-04-09T15:58:58.280

8 How do I actually mine an asteroid? 2018-01-23T15:15:57.223