Solar Definition and 1000 Threads

Are there any usable simulation in the literature on the formation of a solar system? It is possible for example that a solar system has 100 big planets?

Hi I have simulated a dual junction(Multijunction) solar cell of thickness 10 microns and length 20 microns in silvaco atlas device simulator. In order to calculate its efficiency i need exact value of incident solar power i.e Pin for the above said structure. These are the parameters...

Right now I am working on a small pump that is capable of running on solar power for 24 hours a day. So far, I have solar panels with specs at typical irradiance/temp of 1000Wm^-2 and 25C: Pmax = 135 W Vpmax = 17.7 V Ipmax = 7.63 A Voc = 22.1 V Isc = 8.37 A Area = 1m^2 and batter(ies) with...

[b]1. We all know that the solar constant is 1350Watt.m^-2, which is related to a unit surface perpendicular to the solar rays. The question is: which is the average solar intensity on the Earth surface? [b]2. first, the portion of the EArth surface is half the EArth sphere. second, we...

I'm currently studying computer science, but I'm convinced solar engineering is where I'm supposed to be. I have some robotics courses coming up junior and senior year, but I would like to know what are some of the engineering courses I could take during the summer to prepare me for a graduate...

Does the temperature of a solar panel decrease its efficiency?

I assume, that when in orbit, astronauts are still somewhat protected by the Earths magnetic field? However, what about when they're on the moon? Does the Earths magnetic field extend that far? If not, how do they protect their bodies from harmful radiation?

Hello! I was hoping someone on this board might be able to point me in the right direction to solve my problem. I am trying to determine how the tilt angle (from the horizontal) and azimuth of a solar array changes as the array rotates around a fixed axis running from north to south. The...

Hello, I am planning to design, and maybe build, a CubeSat, or a satellite that is 10cm x 10cm x 10cm, and weighs less than about 1.5 kg. I am looking to have 6 solar panels on the cube, one on each face, and also have a full 360º in all directions radar, along with a GPS and some radio...

Ok so I understand how a voltage source works, with electrons flowing from a high potential to a low potential. But I'm a little confused about solar cells. So the way they work is that an incoming photon strikes an electron and gives it enough energy to break free and create a current. But...

hi, I am working on a small solar cell project for which i bought two small solar cells panels of 6volt each producing current of 5.263milli ampere in combination. I want to know that how can i calculate the values of solar cells output in kwh, on the output i have placed two bulbs of 3 volts...

BLUF: Is it possible to mimic a solar loading environment solely in a temperature chamber and, if so, how? We have an 6061 Aluminum box with a known heat load inside. It needs to be subjected to a solar load IAW MIL-STD-810G, Method 505.4, Proc I. Essentially, it is a 24-hour exposure cycle...

http://www.physorg.com/news/2011-04-solar-power-cells-hidden-magnetic.html

The Hubble law v=Hd is basic to Cosmology. Among other good things, it teaches us an absolute criterion for motion and idea of time ("universe time") that are useful in Cosmology. The Law refers to distances d between stationary observers---observers at rest relative to the Background of...

These "Homemade" Solar Panels...Do they even work? http://solarpanelhandyman.com/uncategorized/how-to-make-a-diy-solar-panel-simple-steps/" I am trying to figure out a project to make for a class of mine, where we have to build a "Green" type system, bla bla... Has anyone ever tried? Do...

someone just asked this as a comment on an article i was reading http://home.howstuffworks.com/fluorescent-lamp6.htm 'Does a phosphor powder give off a photon or electron when struck by light?' I was just thinking maybe a solar cell made of phosphor powder to emit electrons. I...

Hello, I was wondering what fraction of the energy delivered by the sun is due to UV-radiation. For example, when I have a solar panel which "catches" 1kJ of solar energy. What will happen if there would be no UV frequencies in the solar spectrum? How many percent less energy will I capture...

I'm a junior in high school and was recently assigned an open ended project in my pre-calculus class to research how precalc (or the basic calculus we have started) can relate to the real world. I have a strong interest in astronomy and physics and therefore desire to look at modeling the wobble...

Hi, The dish is roof mounted and fixed. I want to heat water tubes coming from the base up to the focal point and I'm needing to know if this is sound or a tube coming from the base will never get enough focal point to heat it because it's fixed and not on a heliostat. Or, does the water...

Hello, looking for help designing building/testing and implementing an idea, I have been thinking about using cheap flat panel magnifying lenses on a hinge and pivot, that track the sun, and then having a fiber optic at the focal point, and then having multiple fiber optics terminate at the...

Hi, for all of you we´ve made new user-friendly interactive 3D model of solar system and night sky with real-time planet´s positions. http://www.solarsystemscope.com/ (requires flash) Application in a simple way helps students and laymen to understand the movements of the planets and...

How does solar inverter differ from conventional inverters? And what are the various protection devices inside the solar inverter?

my understanding is that energy is wasted in a solar cells when light with more frequency than necessary to make an electron cross the band gap comes along and the excess energy is converted to heat. does this mean if you only shined blue light at a solar cell which had a perfect electron gap...

Well I'm sure a lot of us have seen websites predicting the end of the world from solar flares causing earthquakes. I'm a physics grad student and with my limited knowledge I have the impression that all such theories are pseudo scientific. But still I want to ask the question. It is...

What is the different between solar cooker and solar oven ? Are they same ?

http://www.scientiaweb.com/2011/03/04/floating-solar-panels/ Sea is the place where they should be but too far from power grids :|

As known, the Earth receives that solar radiation and its value approximately is equal to 1.4 W/m² (data taken from here: http://en.wikipedia.org/wiki/Solar_radiation ). Now imagine that there is some electric motor placed in the Earth’s orbit and it rotates the rod with some certain mass (let’s...

Hi I am senior in Electronics Engineering Technology and for my senior project my professor suggested a solar panel/water fountain but I am not sure on where to start exactly or how it operates. Please HELP .. :'(

Hi I need to write a program in JAVA which simulates the solar system. I'll be using the Beeman's algorithm seen here: http://en.wikipedia.org/wiki/Beeman%27s_algorithm" My question is that if I have the vectors for : velocity, acceleration and position how do I decompose them into there x...

Okay, so I understand that galaxies spin more like a frisbee than the solar system, and that there is evidence for a lot of non-light-emitting mass (such as gravitational lensing) but how would dark matter account for the difference in the spin of galaxies? Gravity still decreases inverse to the...

The Frost Line is the distance from the Sun where the radiation from the Sun becomes too dim to make ice sublimate into vapour. See e.g. http://en.wikipedia.org/wiki/Frost_line_%28astrophysics%29" . It is important because it explains why only terrestrial planets exist inside this boundary. I'm...

Homework Statement The Sun is lower in the sky during the winter than it is during the summer. How does this change affect the flux of sunlight hitting a given area on the surface of Earth? How does this change affect the weather? (I take it I'm supposed to consider the sun to have a...

Can anyone help me please? Are they all elliptic or just some? I need to know for planets, comets, moons and satellites All help greatly appreciated.

This is just a small part of one of my problems. I need to find the luminosity of a stellar population containing 100 solar mass stars and one 20 solar mass star. I think that the 20 solar mass star will dominate, but I am not sure. Here is the formula to use: L/Lsun = (M/Msun)^3.5 I...

We don't see matter rushing to a center point as though down a drain anywhere in the universe. Black holes' accumulation of matter must (except perhaps rare moments like a collision with another black hole) happen over a long period of time. Assuming a star, destined to be a black hole, began...

I'm having a little trouble understanding this, mainly the way the maths behind it works. I can't find any kind of derivation on the internet which is 'simple' and at a level I can understand. My understanding is that the photons from the Sun are absorbed by dust, so transferring momentum...

OK very crude first sketch let me try to explain and you tell me if it sounds remotely workeable. Likemany other eco nuts after the holy grail of energy, I'm trying to brainstorm a low cost solar CHP system. I'm of the opinion that passive solar is always going to win on a BTU/$ collected and...

Hi there, I am doing some research online trying to find a good site that explains to me how sensor resolution works. I have a very vague understanding right now and I was hoping someone could go through it with me. I'll give a bit of background as to the task I have. I have a 4 quadrant...

Why are solar systems and galaxies flat? I find it peculiar that astronomical clusters (ie: solar systems and galaxies) are arranged in a flat plane. Can someone explain why? I understand that: any solar system originates from a random cloud of dust and gas. This cloud will feel its mutual...

I have wondered lately about the amount of energy which interacts with the Earth's magnetic field. Further, to the extent not converted to light as with the auroras, what happens to it in the interaction? If the energy is significant, is it in any way absorbed, transferred or otherwise lead to...

Let us assume Ho = 71 1 / s In order for our solar system to stay in orbit around the milky way, the escape velocity must be greater than the recessional. Resc > Rrec (2GM / R)^1/2 > HoR Now let's refer to Kepler's third law to substitute in for the mass. T^2 = 4π^2R^3 / GM M = 4π^2R^3 /...

Consider a spacecraft attached to a sheet of material, a "sail," that absorbs sunlight. Assume that the sail is positioned to face the Sun and that the combined mass of the spacecraft and the sail is m. How large does the area of the sail have to be to propel the spacecraft away from the...

I am hoping to find how to determine the heat available from focused and concentrated sunlight. I am not confident in my math skills or understanding of some terms, so will describe what I want to do and how I expect to accomplish it. I mostly need an overview and some specific details or...

need help please hi all i need hulp on my project Im a senior electronic engineer student . my project is about heliostat skylight which use a mirror to reflect sun light to spacefic target. I'm going to use 8051 microcontroller to interface btween inputs which they are 4...

i am about to do a project on harnessing solar energy using fresnel lens. However, i do not understand how a fresnel lens works. Could someone please clarify how it works (how can it converge light despite having a flat face) and why does it have more converging ability than other lenses?

would we be able to see a total solar eclipse after about 600 million years from now?

i want to do a project on solar water purification. I just saw a video on purifying water using fresnel lens. However, i haven't found any information on how one can make a fresnel lens suited to the purpose. So, how does one make a fresnel lens?

Homework Statement Earth and Mars are both rocky planets, but Mars is half as far away again from the Sun as Earth, so radiation from the Sun is not as powerful at the surface of Mars as at the Earth’s surface. Using the values in Table 2, calculate the amount of solar radiation...

I am planning a solar collector system for domestic hot water and heating. I am attempting to calculate the heat loss in a storage tank. If we assume: Tank Volume = 1m^3 Tank Surface Area = 6m^2 Tank Contents = 1000L water Initial Water Temp = 90C (194F) The Temp Outside the Tank = 10C...

Can we say that Kepler in the early 17th century was the first person to know the distance from the Earth to all the known planets? One of his laws:The square of the orbital period is proportional to the cube of the radius(actually the semi-major axis). So he new Saturn was about 900 million...