Solar Definition and 1000 Threads

Hi there, I am new in here, thanks for any reply. I took same title of a previous closed 3D by pranj5. As understood main part of the energy absorbed by PV panels goes in reflection and heat. The heat origins mainly in electrons that are excited but not enough to jump or they jump but they...

Hi there, it is commonly accepted that the lifespan of crystalline silicon solar cells is about 20-30years. And they define the lifespan as when the solar cells efficiency drop to about lower than 10%. However, what are the possible reasons for the degradation? I can only find research papers...

Homework Statement 4.18 With reference to Example 4.21, consider the design of a solar sail intended to reach escape velocity from the Earth 2gRe = 11.2 km/s using only the pressure due to sunlight. The sail is made of a Kapton⃝R film 0.0025 cm thick with a density 1.4 g/cm3. Take the solar...

I noticed HF radio waves travel farther and easier when the sun is out rather then during the night. Why?

I have a satellite dish converted to a solar collector. It isn't very big, just a small scale prototype at the moment. I have measured just over 300 degrees Celsius at the focus point. I am considering either using a sterling engine or a steam turbine to generate some electricity. The problem...

Dear All Concerns Black Hole is formed at the end of life of a big star. The mass of such star should be equal to 5-10 solar masses. But I am imaging very small moving black hole coming to our solar system and passing between our Earth planet and the sun thereby creating solar eclipse of unique...

Hi all, I have some difficulties understanding a formula for calculating the incidence angle for incoming solar radiation on a sloping surface. I found that: angle of incidence calculated as cos(j) = sin((pi/2)-surface slope)*sin(altitude angle) + cos((pi/2)-surface slope)*cos(altitude...

Hello all, I am having a very hard time understanding the operating principles of solar cells. I'm mostly confused about what external biasing conditions a solar cell operates under. I have tried googling this question and I get different answers (see the links below). For the TL;DR version...

Hi All. On Tuesday I have to present my research proposal for my undergrad research. I intend to model our solar system using general relativity and compare and contrast my results with observations. Attached is my paper that I had to submit to my adviser. He suggested that I talk about some...

Hi, I am about to write a simple application, simulating in 3D current location of the planets in Solar system. Honestly, I do not know even how to start. Can you please guide me where could I find some good information on planet orbits, current locations and how to make all of the calculations...

The Parker Solar Probe mission will be launched soon and I was reading that it will use gravity assist from Venus to bring its orbit closer and closer to the Sun over about seven years. The diagram in this link shows the plan for seven flyby's of Venus to lower the orbit. Now, to get down close...

Hi everyone. I'm looking for a good book or some good source of informations about the stantard solar models, but i can only find compact stars stuff. Do you guys have any sugestions ?

Solar sails use the push of photons on a mirror. Would it work to use the push of photons in the atoms in fiber optic cables so the question is would there be push and how much on 1 mile of a space train 50 feet wide with 1 foot thick of fiber optics. Here's how I think it would be nearly...

Does use of solar panels or other radiation capturing technologies in itself warm the earth? Since solar energy is radiated partially back to space, then, when a portion of it is captured and converted to electricity which performs work and rseleases heat (e.g. in transmission lines) it would...

Homework Statement I have data for global irradiance on a fixed plane, diffuse irradiance on a fixed plane, global clear sky irradiance on a fixed plane, direct normal irradiance and clear sky direct normal irradiance. I need to calculate the solar power output but I don't know which irradiance...

I am seeking an undergraduate and graduate text for solar astronomy and astrophysics. By solar, I mean the Sun. Quantatative, too. Recommendations and testimonials appreicated. Thank you,.

Hi everyone, I have been studying the physics of solar cells for a long time. The only thing that I can not completely understand is the physical operation of solar cell based on band diagram. Can anyone briefly explain the movements of carriers from one electrode to the another based on band...

It is said that the Madrid Spain solar chimney project occupies 110 acres land, but only output humble 50 kw: https://en.wikipedia.org/wiki/Solar_updraft_tower The fact: the average yearly solar power density of above powerplant = 0.11 W/m^2 Interestingly, there are many countries still...

It seems that a partial solar eclipse is one in which the eclipse circle never completely rises, and it essentially is only a sunrise or sunset eclipse, with the point at which it goes from sunrise to sunset being that location in the polar region where the eclipse is at "high noon" but which it...

I know that energy increases with distance, but what is the relationship? What are different ways to measure something decreasing over distance or time. I really don't have the time to help my younger sister do her homework so I need someone to help me explain to her the relationship concerning...

Homework Statement First I will say, I know I post here alot, but that is because I have exams coming up soon and I am a beginner, and It's crunch time, I'm self taught with only the help of friends and the internet. I'm currently doing a past examination as practice, but this one is much...

Hi everyone, I'm currently trying to build a solar cooker which can also be used during the night / the next day so I was wondering if I can get some advice about how it can be done, especially the material that I can use to store the heat. I saw an article that said a professor from MIT had...

Is there any promising ways to do that? Will it be within a person's life time? I am talking about both unmanned ships and eventually manned ones. Will there ever be a fast way to get to other systems or is humanity just stuck to earth? The idea that everything is there but unreachable is just...

Just running an idea for a diy fresnel lens past .. [ In the context that parabolic mirrors have been created by rotating a liquid ] The volume left above the parabola is also parabolic, so ...if that volume is used as a mold for casting it should form a reasonable solid lens, at least for...

This article suggests that exoplanets are the same size and have equal orbital spacing ,so what is different from our solar system. https://www.sciencedaily.com/releases/2018/01/180109141918.htm An international research team led by Université de Montréal astrophysicist Lauren Weiss has...

I found this on the net https://www.express.co.uk/news/nature/586404/Britain-freezing-winters-slump-solar-activity It states that solar activity will fall in the next few decades and Britain will get colder, Do you think this is true?

Can anyone predict where the planets will be in 1 million years time, could the Earth be kicked out of orbit a far quicker way to die than waiting for the sun to go nova?

Does the 11 year magnetic pole reversal affect the sun's magnetic field configuration as manifested by the Parker Spiral? (BoB 2nd Ed., Page 380) How rapidly does the field this spiral describes decline? Is it an inverse square in attenuation? How does this affect Earth? Thanks.

"There are various theories about how the solar system formed, but scientists haven't been able to agree on a single model that explains all the quirks of our corner of space as it exists today. Now, scientists at the University of Chicago have...

Hi everyone, i'd like to share my packaged (plug and play) solar system project that I assembled at home. I used mostly standard parts such as a charge controller, inverter, 12 Volt UPS battery, and a pair of NEMA 5-15 R power outlets. I built the automatic transfer switch and battery...

i'v googled the subject and it seems like a serious problem, e.g. the dust accumulating on the solar panels, there has even been a term coined 'cleaning event' for Mars winds, as if this is a matter of luck to get the solar panels cleaned. A small carbon-dioxide vent on the tip of the rover...

Solar generation results for US are out for 2016. Year over year: http://www.eia.gov/electricity/annual/html/epa_01_02.html US: Net Generation (Thousand Megawatthours) 2014 Solar: 17691 (that's 0.43%) All sources: 4093606 https://www.eia.gov/electricity/annual/pdf/epa.pdf: US: Net Generation...

Solar tides on the Earth are currently approximately 1/2 as strong as lunar tides. The lunar tides affect the Earths rotation as well as the moon's orbit. Therefore it seems plausible that the solar tides would affect the sun's rotation and the Earth's orbit. Can someone confirm for me that...

This is a pannable simulation that will run in your browser. It shows where Pioneer 10 & 11, Voyager 1 & 2, New Horizons and ʻOumuamua are, how far they are from the Sun, and their speeds. simulation: http://orbitsimulator.com/gravitySimulatorCloud/simulations/1511746688216_hyperbolic.html...

Homework Statement Hello, I am attempting to use the velocity Verlet algorithm of integration applied to the solar system in c++. My goal is be able to use the outputted position components in a plot to see if the trajectory of my object is elliptical/parabolic/hyperbolic resulting from the...

Hi! I'm doing a research project titled "Is it possible to colonise Mars?" I'm currently researching how to raise the temperature and pressure - and I've discovered to do this that re-directing asteroids towards Mars containing Ammonia would be vital. However, where do these asteroids that...

Hello. I am reading a paper which says that only Earth (between the rocky planets) keep a strong magnetic field and it arose an question on this: Why does the magnetic field of the planets decrease with time in such planets? Why the magnetic field of the Earth is the only one which keeps strong?

My physics teacher said that the northern lights are the product of charged particles coming from the sun and interactign with our atmosphere. I believe he said that these are deflected by Earth's magnetic field and directed towards the North and South poles. When I look at pictures on this...

Transparent solar technology represents 'wave of the future' https://www.sciencedaily.com/releases/2017/10/171023123526.htm Date: October 23, 2017 Source: Michigan State University Summary: See-through solar materials that can be applied to windows represent a massive source of untapped...

I have selected a topic for my research work which is "nanostructured materials for solar energy conversion" I have read many of articles, most of which are about Li batteries but I want to do something new. Anyone who's in this field suggests something new.:smile:

Hello! I read in some books that the behavior of the Solar system can't be predicted indefinitely (up to several hundreds of million of years). Is this a numerical limitation, in trying to simulate it or is it some physics responsible for it? (I guess that this assumes that no other bodies...

Homework Statement Homework Equations Voc=kt/q x ln(tpXGlXNd/(ni)2) Isc=A x q x Lp x Gl Lp=√(Dp×tp) FF=Pma/(Isc*Voc) The Attempt at a Solution I got Voc=.298 V and Isc=3.04 mA I]However, I am confused as to how to find the fill factor. I know it is the maximum voltage and current the load...

theory 'a' is we can cook all of our vegan food and heat our water with sunlight. what kind of difference would it make if i got a red painted pot? can you compare that to one painted black? and maybe also to a metallic one. please share some equations.

Thank you in advance - as they say - to ANYONE who can help me figure out how/whether a small solar solution could help my brother in Puerto Rico. Still no water/power. Just candles and a garden hose with "water". I have info overload from DIY sites. Can an average person set something up for...

Hello, all! I found several sources which say that humanity could be in trouble because of solar flares! Scientists said that the Earth could be hit by solar flare within the next 100 years! Current costs of repair in the US could be up to 2.5 trillion dollars! It seems like Sun will punish...

Dear all member, Im alan, and i need some help,,, Did you guys know about floating solar panel? So, I am going to make a product that will float and can support the solar panel (20kg). And know I am in the calculation stage, so i need to know, that my product can : 1. Float 2. How much weight...

Hi, is there anyone can help me how to build a solar panel in a very affordable price?

Hi all, I'm looking for a high capacity battery to store my solar energy. The capacity I'm looking for is between 150 kWH - 300 kWH per unit, just like the battery used in Tesla cars. I'm planning for a 2.250 KWH system. The average consumption of my house is around 10kWH per day. with a...

I'm reading about solar wind and the effects it has on Earth. The charged particles from the solar wind have the potential to affect power grids which can cause outages. I know that it is related to electromagnetism, but how exactly does this happen?

I am a 3rd year integrated Engineering Student. For our 3rd year project we decided to make a portable generator to power laptops that were previously donated to an isolated off grid village in Nepal (for educational purposes). The laptops are currently sitting in rice bags and not being used...