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The Sun is an almost perfectly symmetric yellow dwarf star [spectral class G2V] which is at the center of our Solar System.

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3 answers
150 views

If a star is very far away, it will seem red from our perspective because of the wavelength shift, but our Sun is pretty close to us, so it must have high-energy light, so it must be blue, but it ...
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Imagine you place two identical 1m^2 metal plates on the ground in direct sunlight, A and B. Everything about them is equal, in terms of heat loss to the ground and to the air, the metal they are made ...
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I'm trying to figure out the obliquity (rotation axis of a body) of the Sun but relative to the invariable plane of our solar system (which is primarily dominated by Jupiter, not Earth). Various ...
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Everyday, the sunlight which is an energy comes into Earth, so shouldn't the Energy be increased everyday?
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125 views

Let me preface this by saying that I am aware of the tremendous absurdity that this would be from an engineering and common-sense angle; I am interested only in the theoretical aspect of this question....
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In my solar spectroscopy project, I first used visible light data but could only identify common elements. When I switched to UV spectra from SOHO (specifically around the H I Ly 5 line at 93.78 nm), ...
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I searched this site for about 10-20 minutes using both Google and its built-in search. Wasn't able to find any question similar to this one. I've taken Physics 1+2 and an introduction to modern ...
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33 views

This web page includes two graphs, one of which shows the sun's spectral irradiance as a function of wavelength and the other as a function of frequency. On the first graph, the spectrum "peaks&...
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144 views

In nuclear reactors hot dense plasma regions can rapidly expand and cause the plasma to hit the side of the reactor. Solar flares containing plasma are regularly ejected from the sun. Can nuclear ...
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At noon the sun and the earth pull the objects on the earth surface in opposite directions at midnight the sun and the Earth pull these objects in the same direction is the weight of an object as ...
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2 answers
1630 views

It was sunset, and we were looking at the sun through our polariser/analyser setup. When the angle between P and A was zero, the sunset looked normal (albeit with an expected reduction in brightness). ...
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462 views

Our star acts as a black body of ~6000K. Conveniently, the range of light that it emits has many transitions of common molecular electron shells, which makes spectroscopy a thing, and also allows us ...
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I have a bit of a connundrum concerning some stellar spectra (sun) I obtained from a lab session at my university (with a CMOS camera), where we underwent pixel-wavelength calibration of the spectra ...
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235 views

Below is a graph of spectral irradiance vs. wavelength for NASA SORCE SIM data. I wrote a Python script to create this graph and a corresponding graph of cumulative spectral irradiance vs. wavelength, ...
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When the Sun reaches the end of its main sequence lifetime, hydrogen burning in the core will stop. This will make the Sun's radius expand hugely in its red giant phase, as the helium core maintains ...

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