Albert certainly played the violin, but beware of YouTube videos because there are no authenticated recordings of Einstein’s playing.
https://www.nationalgeographic.com/adventure/article/einstein-genius-violin-music-physics-science
r = 2GM/c² indicates that the radius (r) of the event horizon of a black hole depends directly on the mass (M) of the black hole. Double the mass and the radius of the event horizon doubles too.
The volume of a sphere depends on the cube of the radius (volume = 4/3 x pi x radius^3). Double the radius, and the volume goes up by 2 x 2 x 2 = 8 times.
Since average density = mass/volume, when the mass is multiplied by 2 and the volume is multiplied by 8, the average density is multiplied by 2/8 or 1/4.
So, when the mass is doubled, the average density becomes one quarter of what it was before.
;-)
You were traveling there;-? Mly = Mega light year? Circular reasoning, again;-)
Studies?
It would be better to order the "objects" also according to sizes and brightnesses. Then other, different maps would exist;-)
Aside: You still haven't explained how "matter" decides to either "fall into" "bended" "spacetime" or "bend" "spacetime"-(
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NGC 7603 is a spiral Seyfert galaxy in the constellation Pisces.[1] It is listed (as Arp 92) in the Atlas of Peculiar Galaxies.[4] It is interacting with the smaller elliptical galaxy PGC 71041 nearby.[1]
This galaxy pair has long been a cornerstone for those who are critical of the view that the universe is expanding, and advocates for non-standard cosmology such as Halton Arp, Fred Hoyle, and others.[like whom?][5][6] This is due to the position of two quasars, one at each edge of the filament connecting the two galaxies, with much more redshift than either galaxy.
https://en.wikipedia.org/wiki/NGC_7603
In this household, we follow the Standard Model of Physics and Cosmology:
Anyone who doesn't is a Narcissist and a Crank, IMO. Sorry. 🙂
This galaxy pair has long been a cornerstone for those who are critical of the view that the universe is expanding, and advocates for non-standard cosmology such as Halton Arp, Fred Hoyle, and others.[like whom?][5][6] This is due to the position of two quasars, one at each edge of the filament connecting the two galaxies, with much more redshift than either galaxy.
https://en.wikipedia.org/wiki/NGC_7603
In this household, we follow the Standard Model of Physics and Cosmology:
Anyone who doesn't is a Narcissist and a Crank, IMO. Sorry. 🙂
These days there seems to be a tendency to state that supernova are caused when the core gets to iron with a few shells of others that are lighter. It would be interesting to find out how that conclusion was reached. Earlier views was elements easy - supernova. There are several types of nova. It seems carbon can cause them as well, associated with white dwarfs. In all cases a star formed them. Some mix of gravity and heat. 😉 I like your "such things as".
An interesting comment about angular momentum solar system and other "objects"
https://academic.oup.com/astrogeo/article/53/5/5.19/208905
🙂 Maybe the earlier solar system formation ideas where correct maybe replaced by some star not the one we see today. Given the odd relationship in orbits it's pretty easy to see why they thought the lot came out of the sun but then comes an idea to explain galactical shapes. Spin seems to be involved in many cases. Spin figures in all sort including ideas at times.
You could extend the decay formulae to a point where there is just one isotope. 🙂 Plutonium decays to uranium isotopes but has a bit of a problem.
Omega Centauri is a pesky beast aged via the number of population II stars. Also stars that have reached turn of point. Gravity will still do it's thing overtime. Some of the stars appear to be rather close together. Seems it has a black hole. Hubble looked at a star cloud in it and concluded that stars are moving around at all angles. Refuted by some for obvious reasons. It also seems stars are still forming in it.
LOL A foreign language paper written in English
https://arxiv.org/pdf/astro-ph/0012493.pdf
That crops up in star clusters now and again until some one looks in the correct way.
The observable universe info had no impact on you? It just uses what might be called known factors.
Maybe I prefer the term QSO as when it was used they were extremely powerful sources that could be examined with radio telescopes. No chance of using optics at these distances. 😉 I also think QSO has a nice ring to it, Quasar may be better for the general public. Quasi has connotations.
One of the corner stones of redshift is Cepheids. Variable stars that always have the same brightness at source so distance can be calculated via how bright they appear to us here and redshift also measured. Initial distances calculated with simple trigonometry based on the distance across the earth's orbit. One was found in the Andromida galaxy. Distance turned out to be way way further than previous thoughts. A mere 2.5 million light years, Given how planets are detected around stars other than ours could some form of binary system give the same results. 😉 Doubt it - but.
An interesting run down on observing black holes and other factors concerning them especially ours.
https://www.astronomynotes.com/ismnotes/s9.htm
One I haven't read yet concerning population number stars varieties in the milky way. First decent source I've found. Something mentioned in others relating to star age surprised me.
https://www.cambridge.org/pl/files/9213/6682/0020/276_p14-18.pdf
An interesting run down on observing black holes and other factors concerning them especially ours.
https://www.astronomynotes.com/ismnotes/s9.htm
One I haven't read yet concerning population number stars varieties in the milky way. First decent source I've found. Something mentioned in others relating to star age surprised me.
https://www.cambridge.org/pl/files/9213/6682/0020/276_p14-18.pdf
I'm happy with quasar as the term quasi stellar object (QSO) does not exactly trip off the tongue!
Other 'cosmic mile markers' or 'standard candles' are type 1a supernovae.
Type Ia supernovae are the thermonuclear explosions of white dwarf stars.
White dwarf stars all have a standard mass so the brightness of the supernovae they produce is predictable.
Since brightness decreases with distance, we can use the difference between the observed brightness of a type 1a supernova and its predicted brightness to calculate how far away it is.
As the database of type 1a supernovae increases, scientists may one day be able to make a final decision on whether or not the Universe's expansion is accelerating as has been suggested.
But this does not answer the question about the evidence for the unboundness of the quasars to the galaxy, for their enormous distance)-;
It may well be that when looking at other apparently galaxy-bound quasars, their redshift will appear to depend on the distance from the galaxy center;-)
I'm afraid cartographies by magnitudes, brightnesses, frequencies, correlations... are reluctantly made and published because they would challenge the "standard model";-)
;-)
May be, Supernovae ar also a necessary nonsense product to maintain the nonsense thesis of expanding "space-time", exacter: "spacing-tact"; "coordinate system" (not "universe").
The enormous "energy bursts" concluded from the observation of brightness and assumed distance (Doppler effect - red shift) must be explained. If we would use scientifically not only the Doppler effect, which also Edwin Hubble with increasing research considered as non-cause of the red shift (Halton Arp only continued Edwin Hubbles observations), as a cause, we would come again into the frame of physically explainable distances and "energy bursts".
... may be to other interpretations of the observations;-)
May be, Supernovae ar also a necessary nonsense product to maintain the nonsense thesis of expanding "space-time", exacter: "spacing-tact"; "coordinate system" (not "universe").
The enormous "energy bursts" concluded from the observation of brightness and assumed distance (Doppler effect - red shift) must be explained. If we would use scientifically not only the Doppler effect, which also Edwin Hubble with increasing research considered as non-cause of the red shift (Halton Arp only continued Edwin Hubbles observations), as a cause, we would come again into the frame of physically explainable distances and "energy bursts".
... may be to other interpretations of the observations;-)
A couple of quasar links
https://skyandtelescope.org/astronomy-resources/what-is-a-quasar/
https://skyandtelescope.org/astrono...-answers/kavli-foundation-first-quasars-form/
Black holes and young stars. Of late they are using Myr and Gyr. M being a million and G isn't a giga.
https://www.mpe.mpg.de/6590980/stellar-population
https://skyandtelescope.org/astronomy-resources/what-is-a-quasar/
https://skyandtelescope.org/astrono...-answers/kavli-foundation-first-quasars-form/
Black holes and young stars. Of late they are using Myr and Gyr. M being a million and G isn't a giga.
https://www.mpe.mpg.de/6590980/stellar-population
The second link above mentions the Euclid Space Telescope which launched recently (see past posts).
Euclid will use infrared light to look really far back in time, even into the epoch of reionisation.
Euclid should revolutionise our knowledge of high-redshift quasars up to z = 8 *. Quasars are observational manifestations of the first super-massive black holes, seen as they were when the Universe was just half a billion years old, just a few per cent of its current age.
* z is the numerical value of redshift (z = 0 corresponds to present time). The largest observed redshift and the furthest back in time is that of the cosmic microwave background radiation (z ~ 1089).
Euclid will use infrared light to look really far back in time, even into the epoch of reionisation.
Euclid should revolutionise our knowledge of high-redshift quasars up to z = 8 *. Quasars are observational manifestations of the first super-massive black holes, seen as they were when the Universe was just half a billion years old, just a few per cent of its current age.
* z is the numerical value of redshift (z = 0 corresponds to present time). The largest observed redshift and the furthest back in time is that of the cosmic microwave background radiation (z ~ 1089).
Artists impressions are, Observation suggests that they have been closely studied optically in the way planets have.
This is about as good as we can get from actual imaging
https://hubblesite.org/contents/media/images/2017/12/4003-Image.html?news=true
The spikes are down to the telescope supports.
another
https://www.eso.org/public/images/eso9858g/
There used to be radio telescope "images" around but can't find one, Found this though on a particular quasar,
https://iopscience.iop.org/article/10.3847/1538-4357/acaea8
I beg to disagree.
"Observation" does not imply optical means, i.e., only via the visible spectrum.
"Observation" does not imply optical means, i.e., only via the visible spectrum.
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I've attached two spectacular images from the MeerKAT radio telescope in South Africa which reveal hitherto unseen details of the centre of our galaxy.
The mozaic in the first attachment reveals the chaotic region around the supermassive black hole at the centre of the galaxy, the expanding shells of supernova remnants and unexpectantly high numbers of the mysterious radio filaments that were first discovered over 35 years ago.
The second attachment zooms into a supernova remnant at the centre, to the left of which is a feature known as the "mouse", which is believed to be a pulsar ejected by the supernova remnant. To the upper right is one of the longest radio filaments, known as "The Snake".
The MeerKAT array consists of 64 individual dish telescopes, each of which collects and focuses radio signals.
The mozaic in the first attachment reveals the chaotic region around the supermassive black hole at the centre of the galaxy, the expanding shells of supernova remnants and unexpectantly high numbers of the mysterious radio filaments that were first discovered over 35 years ago.
The second attachment zooms into a supernova remnant at the centre, to the left of which is a feature known as the "mouse", which is believed to be a pulsar ejected by the supernova remnant. To the upper right is one of the longest radio filaments, known as "The Snake".
The MeerKAT array consists of 64 individual dish telescopes, each of which collects and focuses radio signals.
Attachments
Not "gravitational-lensing" but "light refraction, -redirection".
The title of the image is inappropriate. Stays with the observation. Not one interpretation, explanation - of several conceivable - uses.