I’ve been watching
What is the scientific name of the enigmatic long linear dark features...
Hello. I am a filmmaker writing a screenplay and I am in need of technical support to validate a method being used in the film.
I am going to post this in the Earth Science forum but I'll copy it here, in case anyone reading this might know.
Thank you all!
"I am wondering if shadows cast...
When first introduced to the concept of the ecliptic, I was under the impression that the ecliptic was the path taken by the Sun across the sky over the course of a day. That is to say, the rising in the east and setting in the west, due to the Earth's (daily) rotation from west to east. (Image...
Assuming you know the core mass, and other data about the sun, such as temperatures and pressures. Find the density at the very center of a star.
I think this may be involved.
P(r) = p(r)/µmH kT(r)
The Attempt at a Solution [/B]
I don't know where to...
From near to the center of the solar disc, Fe I line emission from point X shows a spectral line with components 666.823, 666.830 and 666.837 nm, around the rest wavelength of 666.800 nm. The central component is not as bright as those at the longer and shorter wavelengths...
In the wikipedia article about solar sails the lightness number is mentioned and the calculation is the characteristic acceleration ac divided by the Sun´s local gravity (distance: 1AU): λ = ac / 5.93
why do they use 5,93 m/s^2 for the sun´s gravity and not 274 m/s^2?
I live in a small town and would like to make some observations today. However i dont have a solar aperture filter, i only have an eyepiece filter of which i do not trust. So is there any household items, materials i could use safely to save me from from ordering on the net and waiting however...
Black bodies are objects that don't reflect radiation.
But If I shoot light beams to the sun, it doesn't reflect it , so does that mean the sun is a black body(or at least very close to a theoretical one)?
If we have two objects A and B appear on the opposite sides of the equator of a planet like Earth with the same mass as Earth. Object A is a neutron star with the mass of the sun and object B is a iron cube with the mass of one gram. Will A or B hit the Earth at the same time or will one hit...
My question to you is this...
Can the interior of the Sun be described as an ideal gas?
From my knowledge, to describe a body of gas as an ideal gas, the separation between the particles must be much greater than the size of the actual particles.
How could one justify whether the Sun fits this?
Hello. First post here so hi all.
My question(s) is regarding the formation of solar masses by accretion of gases and dust. From what I understand, stars are formed by large clouds of gasses and dust particles pulling together and with enough gravity, (magnetic fields), and time. A fusion...
Disclaimer: not a physicist (I wish I was that brainy)
Quick question regarding a speculative architecture project I am undertaking;
In the completely hypothetical event of a huge, otherworldly solar flare super-charging the earth's ionosphere beyond anything we have ever recorded...
This thread is for showing your images of solar activity taken with YOUR cameras, telescopes etc.
That is, don't post images from SDO, SOHO or any other professional sources unless you specifically want to ask "how do they do that and what are those solar features I can see?
I'm trying to calculate the daily solar insolation (integrated solar irradiances from sunrise to sunset) for a given location and day of the year. For latitude 43.2° and April 15th, I get:
H0 = (solar constant * scale factor for intra annual variation of sun-earth distance * 86400...
According to the sunrise equation, the hour angle of the sun at sunset is:
cos H = -tan(a)tan(d)
where H = the hour angle, a = latitude and d = solar declination angle.
This equation says that H at sunset = -H at sunrise. Now, I have a few questions concerning that:
1) I was...
Bear with me, this is a very specific question for a scifi book I'm writing.
If we had a ring in place of the moon, and you lived somewhere in the United States, how often would the ring intersect with the sun when it's setting (or rising, if it makes it easier).
I know that it can take up to...
A tree seed takes water and minerals(?) from the ground, carbon and oxygen(?) from the air, and heat and light(?) from the sun. When a tree dies and dries up, it can be used as firewood, a source of energy.
Is there a way to capture that energy without the seed-tree scenario? i.e., but can we...
I am filmmaker from Berlin and despite physics focus back in high school I am really bad at it. I am trying to get my head around some ideas I am working on and would kindly ask you for some tiny calculations. I hope this is OK and maybe even fun for someone here?
So my questions...
I'm new in physics and I don't understand many things there. What interests me the most is energy generation.
I was mostly reading Wiki articles, and I found something I couldn't understand, so I'm asking for help.
According to wiki, peak power output of the largest nuke ever was...
I want to write a fortran program which gives me the right ascension and declination of the sun and the phase of the moon when a date and time is given.
I just want to know how to write it and if there are any references that can help me.
Hi! I guess this question must be easy, but it's driving me crazy: in what time of the year does the Earth "trails" the Sun in its current galactic movement towards Vega? And, could you please confirm that during this period Vega is not visible because it's always facing the "day side" of the...
Wikipedia says that solar core has 15 millions of Kelvins ( https://en.wikipedia.org/wiki/Solar_core ), what translates into ~1.4 keV energy per degree of freedom.
For nuclear fusion we need to take the two nuclei to distance of range of nuclear forces: ~1fm (...
The sun's rotational period is 25 days at the equator. Given that the radius of the sun is 700,000 km, calculate the max velocity of approach or recession of the Sun's equator as viewed from Earth. Find the max change in wavelength of a spectral line due to the rotation and express it as a...
I understand that the fusion of hydrogen to helium in our sun's core generates gamma rays. My question is how are these gamma rays transformed to the full spectrum of photons that we that we observe from earth?