Tag: redshift

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

23 How distances are measured in the Solar System, in the Galaxy, and in the Universe? 2013-09-25T04:35:43.950

21 Where does the energy of light go, when it red-shifts? 2016-10-06T21:50:39.160

14 Is it possible to measure galactic red shift using consumer telescope equipment? 2013-12-09T21:10:48.710

13 Why are there so many seemingly blue-shifted galaxies in deep space 2016-03-11T19:35:44.060

12 Can the difference between a star and a galaxy which are point sources be detected? 2016-09-15T07:47:48.810

10 How does gravity affect the wavelength of light? 2014-01-06T18:04:33.853

9 In km/h, what actually is the "speed" of Andromeda away from us: cosmologically? 2016-10-06T15:46:21.677

9 Why is the letter *z* customarily used to denote redshift? 2016-12-11T03:01:08.503

9 Does the accelerating expansion of the Universe contradict Hubble's law? 2018-04-06T10:56:36.170

8 Dark Energy Expansion 2014-06-21T06:03:59.407

7 Have we detected galaxies which have red-shifted beyond the visible light range? 2014-12-03T19:09:11.090

6 Which galaxy is receding from the Milky Way the fastest? What is known of the mechanism behind its recession? 2013-10-06T11:35:07.050

6 Heavy star and redshift 2014-01-09T16:35:23.733

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

6 Might the universe be really small yet seem infinite from spherical reflections? 2014-04-08T06:31:34.943

5 Does the universe expand at the same rate everywhere in the universe? 2015-09-04T16:42:26.153

5 Fingers of God effect for galaxy clusters 2016-10-16T10:12:08.627

5 "True" motionlessness - red shifts and CMB 2017-04-28T01:21:12.903

5 Could a contracting Universe create the redshift effect observed by Hubble? 2018-02-12T22:58:42.627

5 Sun's spectrum red shift 2018-04-24T19:29:18.740

5 Number Density of Dark Matter Halos 2018-09-19T09:54:31.413

4 How do we find the exact temperature of a star? 2014-05-06T10:36:41.840

4 Is the expansion accelerating or Decelerating? 2014-06-10T18:32:42.730

4 Can Hubble red shift be interpreted as time dilation? 2014-10-10T21:42:15.040

4 Red shifting galaxies 2014-12-03T03:25:31.543

4 Do objects look larger the further away they are, beyond z=1? 2015-01-25T12:21:53.863

4 Estimating galactic dust extinction for medium band filters 2016-04-13T17:36:35.797

4 Redshift quantization 2016-12-19T06:57:50.197

4 Can space-time expansion destroy light? 2017-10-23T08:48:34.743

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

3 Conundrum involving distance to object, universal expansion, age of universe, etc 2014-04-13T10:00:57.100

3 how does redshift prove expansion is accelerating? 2014-07-05T15:08:22.027

3 How Do we know about redshift? 2015-09-21T05:08:05.637

3 Why is there no time in the distance equation using Hubble constant, red shift and speed of light? 2015-12-16T17:46:22.980

3 What is high redshift? 2016-12-28T20:59:09.677

3 Does wavelength affect redshift caused by the metric expansion of space? 2017-09-08T00:12:43.333

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

3 Question from Introduction to Modern Cosmolgy by Andrew Liddle 2018-06-01T11:34:30.760

3 Do gravitational waves have distinct bands or parameters from which a source redshift can be inferred? 2018-06-24T09:34:54.733

3 Do other supercluster like Laniakea also get pulled by the Great Attractor? 2018-07-12T08:03:25.897

2 Can redshift be measured using fourier? 2014-01-14T09:30:18.450

2 Data for red-shifting 2014-08-12T22:13:29.030

2 Wher can I find a list of blueshifted regions in the Milky Way? 2015-01-06T14:46:31.310

2 How do we know that light is redshifted/blueshifted and not the original light of a star/galaxy? 2015-10-25T09:52:27.427

2 How to disentangle a very distant star's relative velocity vs. redshift distance 2015-10-29T01:44:08.577

2 Number of galaxies per redshift 2016-01-04T18:08:35.893

2 Why do linear velocity redshifts correspond to linear pixel shifts when the spectra are binned in constant log wavelength? 2016-04-12T18:31:12.077

2 Are we center of universe? 2016-04-19T15:56:20.957

2 Evidence of CMB redshift 2016-04-22T16:54:06.903

2 Does the redshifting of photons from the Universe's expansion violate conservation of momentum? 2016-11-24T16:26:47.037

2 Are blue and red shift visible? 2016-12-30T22:21:19.007

2 Approximate conversion of redshift 'z' to a time and/or distance, when reading papers? 2018-05-24T18:00:35.487

2 How far away is this galaxy? 2018-06-15T21:22:20.303

1 Do contracting objects show redshift? 2014-05-01T15:02:10.933

1 Is there a radius inside of which objects are (doppler) blue shifted? 2014-07-09T05:44:19.590

1 Basic celestial data 2014-07-19T10:04:05.383

1 How does one measure velocities of far-off, bright objects 2015-03-17T01:17:03.110

1 Hubble law, cosmological redshift and distance 2015-07-27T19:41:19.283

1 Gravitational red hift vs Doppler redshift: Is the universe really expanding? 2015-11-07T12:43:33.690

1 How do I modify redshifts to gain corrected line of sight velocities? 2016-03-27T19:33:30.190

1 How can we explain high redshift numbers? 2016-05-09T15:40:29.300

1 How do I apply a velocity shift to a wavelength array with uniform logarithmic spacing? 2016-06-16T20:24:56.030

1 Black hole darkness a result of gravity or temporal distortion? 2016-06-23T01:59:50.107

1 Future redshifting and effect on the 'pitch' of CMB radiation 2016-07-07T20:45:25.523

1 How fast would we have to go for the red(/blue)shifts of galaxies ahead of us to differ from those behind us with statistical significance? 2016-07-31T19:57:33.837

1 Does red shift need to compensate for space expansion 2016-09-23T13:44:17.147

1 Is the CMB the photons that were created at the birth of the atom? 2016-12-29T10:30:33.250

1 Are all planets/galaxies moving away from *us*? 2017-02-02T20:07:58.543

1 How long will it be until the nearby groups of galaxies are receding at speeds faster than light? 2017-03-29T22:49:02.973

1 Understanding The Turnover Point of Angular Diameter Distance 2017-05-13T10:04:12.467

1 Redshift observation at different wave length 2017-08-22T11:23:17.720

1 How does space time differ within a galaxy? 2018-02-19T03:15:11.997

1 How can you estimate distance of an object by its redshift? 2018-05-25T18:41:32.267

1 At what speed does something have to travel away from us for it to red shift enough that it becomes invisible to the human eye? 2018-07-17T22:23:47.567

1 Wavelengths for observed objects -- emitted or observed? 2018-08-07T03:40:41.763

1 Can I take logarithms of magnitudes (which are already log) 2018-08-15T00:31:29.357

0 Is Blue Shift just as provable as Red Shift? 2015-02-22T23:39:36.410

0 Why Milky Way and Andromeda are being drawn together if there was 'Big Bang'? 2016-03-26T01:14:33.267

0 Locations of farthest matter 2016-04-19T13:01:50.987

0 Redshift to calculate age of stars 2016-05-08T23:42:00.553

0 Measuring space expansion 2016-10-31T19:57:27.287

0 How to convert theoretical template spectrum from luminosity density to flux density units? 2017-02-20T02:07:44.770

0 Question about Hubble parameter (Hubble constant) and measuring it 2017-04-04T15:39:22.267

0 Approximating density of hydrogen in [observable] universe 2017-04-16T15:04:55.993

0 relative distance and right ascention 2017-06-05T13:20:57.767

0 How to shift AGN x-ray spectrum to rest frame from 2017-07-06T01:03:37.450

-1 Can the shedding of radiation of stars contribute to the red-shift of the universe? 2018-01-23T20:17:56.650

-3 Is there any way to tell which way is the next universe? 2018-01-24T23:16:19.247