Questions tagged [astronomy]
The science dealing with objects and phenomena located beyond Earth. In particular, this applies to observations and data. At its core, astronomy is the physically informed cataloging and classifying of the contents of the universe in order to better understand what is out there.
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Could climate change be caused by interstellar dust burning up on the corona of the Sun? [closed]
We seem to have pretty good estimates for the Sun's surface temperature but, as I understand it, we're yet to have any means of detecting fluctuations in the temperature of the Sun's corona. ...
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Is there a reason why in the astronomic pictures of galaxies and nebulosas there is so little green color?
From a quantum physics standpoint, why do astronomical images of galaxies and nebulae exhibit so little green color in their spectral composition?
When we look at the pictures of galaxies provided by ...
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About redshift and distant objects observation
I did a few Time&Length dilation factor calculations. This is for a distant clock away from any field and a clock on Earth on the equator with the moon passing over clock coordinates, the factors ...
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Is there a database or catalog of all black hole candidates?
I am searching for a catalog, list, database, etc. That should show astronomical observations of known black hole candidates. I am primarily interested in knowing the mass of these candidates.
I have ...
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Is the information or energy in a black hole converted to another form of energy during decay of Hawking radiation?
The Hawking temperature equation states that the temperature of a black hole is inversely proportional to it's mass, and and the black hole loses mass when it emits particles in the form of radiation, ...
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Geocentrism and annual tide variation
I have read that in the before common era, Seleucus of Seleucia have studied tides and probably used annual variation as an evidence of heliocentric. However, tides are known to be affected by ...
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What is emission line ratio?
As the header stated, what exactly is the 'emission line ratio'? Like, [O III]/Hβ or [Ne V]/[Ne II]. Recently I've been reading some research papers in astronomy and astrophysics pertaining to ...
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Assessing the quality of wavefront correction in adaptive optics systems: the case of single and multiple radiation sources
Generalized diagram of an adaptive optical system is as follows:
Wavefront from the observation object passes through the atmosphere and is distorted. It is then reflected from the deformable mirror ...
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Should luminosity distance be $0$ at $z=0$?
I am working on coding up the luminosity function for blazars but I have ran into a problem. In equations 1-3 of this paper https://arxiv.org/abs/1912.01622 they state that the flux can be broken down ...
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Stars that have fairly high gravitational redshift and calculation of their surface temperature by Planck emition spectra?
How high can the ratio between gravitational redshift and planck emition spectra be depending on the mass of the star so by how much this gravitational redshift could elongate the Planck spectra of ...
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What is the function that demonstrates a planetary transit light curve given a planet's projected distance from its star?
Last night I was measuring the brightness of a Hot-Jupiter parent star to try and isolate the transit light curve (specifically Tres-2b). I have been wondering how to obtain the function that ...
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Does the Kardashev Scale have any practical application?
As the question states: are there any practical applications of the Kardashev Scale?
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Is it possible to predict the appearance of auroras?
Yesterday I saw online a lot of people seeing auroras both in the North and in the South of the globe. Unfortunately, I wasn't one of these people, and this got me curious about how much we can ...
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Trajectory of supergiants on HR diagrams
I am a secondary school student currently studying cosmology. My A Level textbook supplies the following HR diagram with regards to what trajectories different stars follow:
I found myself unable to ...
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Magnetic tubes or magnetic field lines around a black hole?
A picture is worth thousand words:
Magnetic field lines, unlike magnetic tubes, have a continuous distribution. Recent pictures of black hole magnetic structure show tubes. Is there a model that ...
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