Tag: astrophysics

32 How does neutron star collapse into black hole? 2013-10-23T09:19:16.200

32 What happens to the 99.9 % of the sun-rays that do not fall on any planets or any other celestial body? 2016-08-20T14:28:05.863

29 Quantum Mechanics after the detection of Gravitational Waves 2016-02-12T07:19:23.057

22 What would happen to a polished marble statue left in space for a million years? 2018-04-02T02:38:07.980

17 How does the evolution of a solar system not break the second law of thermodynamics? 2014-06-07T05:17:23.700

13 What causes the dimensions of a star increase when its hydrogen fuel is exhausted? 2014-10-09T11:41:13.187

13 Open problems in astronomy that an amateur (with a PhD in some other field) would have a chance of solving? 2015-04-05T12:20:26.120

13 Is it "weird" that all disc galaxies rotate once every billion years? 2018-03-15T18:17:17.473

12 Is it possible that a ultra-large portion of the space we live in is already inside a black hole? How could we refute this? 2014-09-09T20:17:55.700

10 Timescale of ignition of a protostar? 2013-10-24T10:16:54.200

10 How does a gravity slingshot actually work? 2014-07-21T15:37:53.773

10 Would a tablespoon of a neutron star remain intact? 2015-04-27T22:58:23.500

9 Period coincidence of Planet Nine with furthest Kuiper belt objects 2016-11-04T20:10:03.300

8 How can the life time of a multiple star system, such as for example the trinary system PSR J0337+1715 be derived? 2014-01-10T17:38:07.320

8 Why do certain moons have their rotational period equal to their orbital period? 2017-07-06T14:28:49.377

8 Why do stars born in cluster finally drive away from each other 2017-09-15T21:41:20.977

7 Are there real uses of abstract algebra in astrophysics? 2015-12-16T16:06:22.617

7 Why do we use FITS format for scientific images especially in astronomy? How is it different from formats such as JPEG, PNG etc? 2016-05-29T19:20:53.427

7 Gas giants and seismology 2017-08-24T13:38:04.260

7 What was the length of the solar day 73 million years ago? 2018-10-10T22:50:11.450

7 Estimates for "undetectable" planets in extra-solar systems 2018-11-14T16:32:47.797

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

6 Weight of a celestial body 2014-08-13T04:16:52.760

6 Assuming a sufficient amount of mass above the density threshold, does the actual concentration of the mass matter in creating a black hole? 2014-09-10T16:09:46.343

6 What more could be learned from a rare astronomical event if we knew precisely when it would occur? 2015-06-04T19:46:20.987

6 Is any consensus forming on the solution to the "Lithium Problem"? 2015-09-15T23:40:42.037

6 What is the reason the Jovian planets are in descending order of size? 2017-07-20T03:23:11.793

6 Delay between neutrino pulse and visible flash of supernova 2017-11-07T00:51:19.550

6 What do the acronyms in "AT 2017 gfo" mean? 2018-02-23T02:19:48.223

5 Observational Evidence for the Existence of Black Holes 2014-08-07T18:32:20.817

5 Is there a lower limit for the altitude of orbiting objects? 2014-10-08T21:15:05.243

5 What happens to the Gas Pressure when working out the Eddington Luminosity? 2015-04-14T20:21:26.167

5 K-Pg asteroid impact 2016-03-06T12:05:46.857

5 Are there non thermal filaments outside our Galaxy? 2017-01-10T09:38:14.817

5 A question about calculating the radius of a comet 2017-07-10T16:31:29.087

5 How to know that the 21cm Hydrogen line is the actual emission and not any other redshifted line? 2017-08-23T11:18:24.977

5 GW from merging of neutron stars and black holes 2018-05-23T20:53:28.263

5 Why do neutron stars collide instead of just revolving around each other like planets revolve around the Sun? 2018-05-29T16:50:38.607

5 How does gravity affect pressure under water? 2018-11-28T21:18:47.413

4 How fast is the universe expanding? 2014-02-27T13:02:20.537

4 Satellite's orbit 2014-03-01T11:17:16.030

4 What uncertainty does an error bar signify in astronomy? 2015-02-10T17:41:08.633

4 Gravitational pull needed to keep a gas in atmosphere 2015-03-25T06:13:43.070

4 Circular formation around the moon 2015-04-20T16:56:14.703

4 Why are the magnetic poles of a pulsar so far off the rotational axis, yet stable? 2015-10-09T20:08:30.740

4 Could a pair of binary black holes form within a star? 2016-02-17T11:19:31.003

4 Does conservation of energy make black holes impossible? 2016-03-14T18:38:41.513

4 Why dust is optically thin in Far Infrared wavelengths? 2016-05-02T16:21:49.800

4 Can I do M.Sc in physics to become an astronomer after doing B.Tech in aeronautical engineering? 2016-09-30T19:01:35.240

4 Kepler and the Sun position 2017-01-16T21:50:11.977

4 What are IRAS sources? 2017-04-06T08:05:41.097

4 What are infall signatures in stars? 2017-06-19T05:55:05.480

4 If I want to learn about astrophysics, should I study up on mathematics? 2017-10-21T19:02:06.263

4 What happens to the momentum of a star as its mass is converted to energy? 2017-11-06T01:59:06.410

4 The CNO cycle in first generation of stars 2018-03-30T15:37:32.463

4 What is equation of straight line for a ideal blackbody on the color color diagram? 2018-04-08T06:50:43.670

4 Calculating obital velocity from radial velocity 2018-05-08T05:36:06.473

4 Angular Diameter Distance 2018-06-16T15:14:13.597

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

3 Is there another explanation, apart from the doppler effect, for the redshift observed in distant galaxies? 2014-03-15T15:56:08.537

3 Is a white dwarf hotter than a Red Giant? 2014-08-10T08:17:56.143

3 What is the Fundamental plane for Elliptical Galaxies? 2014-09-23T08:42:32.223

3 Where can I learn these Astrophysical techniques? [Read below] 2014-11-28T21:27:32.120

3 Exploiting symmetry in the axisymmetric Jeans equations 2014-12-06T14:29:47.633

3 How would Jupiter's brightness relative to our sun seem to a remote observer (observing from a remote star) 2015-02-13T14:10:20.640

3 Pulsars: How do astronomers measure minute changes in period (~picoseconds per year)? 2015-06-15T20:03:11.070

3 What is the accuracy of an artificial satellite at a certain magnitude? 2015-08-03T21:00:21.037

3 At what rate are stars accelerating? 2015-12-15T17:46:29.157

3 If the Sun were bigger but colder, Earth would be hotter or colder? 2015-12-19T14:59:43.400

3 Relationship between absolute magnitude of a star and its luminosity? 2016-02-12T15:50:24.517

3 Discovery in Astronomy vs one in Physics - do they differ in required burden of evidence? 2016-03-04T20:26:51.720

3 Mass limit of planetary ring 2016-05-15T22:38:02.570

3 What is meant by ionization states? 2016-05-18T09:45:25.607

3 Is a black hole made from a anti-matter star the same as a ordinary black hole? 2016-08-31T11:31:09.580

3 What is the spectral power output of a typical galaxy? 2016-11-01T23:09:09.157

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

3 Why does Sirius proper motion "wiggle" with a 1 year period, when Sirius A and Bs binary orbit is a 50 year period? 2016-12-13T14:32:03.393

3 Property of elliptical orbits 2017-05-24T08:46:28.377

3 How do tip tilt mirrors correct distortion in adaptive optics? 2017-07-24T11:22:43.490

3 What happens if a white dwarf collides with a star like our sun or a red dwarf? 2017-09-07T12:37:34.103

3 If the Earth is rotating counter clockwise, how does the sun rise from east? 2018-01-02T19:11:51.427

3 Can a star eat a black hole? 2018-03-26T13:38:20.877

3 Flatness of celestial systems like galaxies and Solar System 2018-04-05T04:36:15.587

3 Photometric redshift 2018-05-02T07:58:30.867

3 Account for radiation energy in the statement "total energy of universe is zero" 2018-05-28T17:30:21.187

3 Will the Sun's solar wind push a permanent magnet out of our solar system? 2018-06-21T16:18:43.473

3 Will all galaxies eventually become elliptical galaxies? 2018-07-24T03:34:10.713

3 Is there a more modern/updated paper than Hurley's 2000 SSE? 2018-09-15T17:54:46.563

3 Why does the adiabatic exponent decrease at the ionization zones? 2018-09-25T19:53:11.177

3 What liquids can be found in the void space? 2018-11-25T18:53:48.763

2 Good Introductory Textbooks 2013-12-26T04:54:43.590

2 Using Tully Fisher to measure Distance Problem 2014-09-24T04:51:19.777

2 Is it accurate to say that we have a gravitational attraction towards all objects in the known universe? 2014-10-21T17:46:57.333

2 What happens to a white dwarf past the Chandrasekhar limit? 2015-02-20T22:16:40.327

2 Can you assume atmosphere height for the purpose of surface pressure calculation? 2015-04-09T21:00:19.320

2 How to calculate the mean molecular weight of the Sun 2015-11-25T16:32:47.277

2 When is it a good aproximation to consider a star to be an ideal gas? 2015-12-03T01:27:15.870

2 Dust mass-loss rate from a massive star given a set of parameters? 2016-01-08T10:23:23.773

2 Determining distance from semi-major axis and eccentricity 2016-02-09T21:03:14.897