Solar Definition and 1000 Threads

Hi everyone, i'm looking for a website that can show me how the solar system was in place the minute i was born. November 6, 1982 6:32 a.m. I found this website but i don't know how precise it is. http://www.fourmilab.ch/cgi-bin/Solar please let me know! thanks.

What is the biggest hurdle for building a space based solar power system? is it the cost? All the space faring countries can come together and launch each part separately and then assemble them together just like the ISS right? Is it the transmission of power from the satellite to...

Forgive my noobness and possibly the wrong forum selection. As we live within collecting distance of an energy abundant star, would it not be possible to harness that energy, through delicately polished mirrors mounted on satellites and then direct those satellites at a few key points around...

Has anyone figured out or tried this: It seems to me that since light is bent by G fields, that looking close enough to the side of a black hole, some of that light near the event horizon may have escaped its G field after its trajectory has changed significantly... possibly redirected enough...

Hi ! Somewhere I read about our solar system is going slowly out of our galaxy (moving backward from the center, but then I can also read our solar system is approaching center with sonic speed. So how is our solar system actually moving toward the centre of milky way (beside rotation around...

For a science project, I plan to come up with a reliable way to produce clean water from the sun. I've toyed with ideas of using fresnel lenses and parabolic concentrators, but none of them solved all the problems I had. Then, I thought of using multiple—and when I say multiple I mean about...

What if you had a laser solar sail and in front of the sail was a small thruster (either chemical or itself a laser)...thrusting constantly at a right angle to the forward direction of the craft so that the sail's trajectory would bring it back towards the first (main/stationary) laser that...

Is there any effect of expansion of world on our solar system? i.e. Is there any change in distance between Earth and sun due to expansion of world?

now in many houses, there are solar water heaters the problem is that, what is the highest possible temperature reachable using the sunlight? another problem is, what if the sunlight is replaced with a laser light?

what % of solar energy is converted to solar neutrinos, assuming energy released in all forms per unit time , say 1 second as 100%?

[SIZE="5"] what % of solar energy is converted to solar neutrinos, assuming energy released in all forms per unit time , say 1 second as 100%?

I want to maximize solar cell efficiency regardless of the sun's angle and so I've been looking at placing Compound Parabolic Concentrator (CPC) over the top of a high efficiency round solar cell. If I come up with a good design then I would like to try and manufacture some of them to see if I...

Hello. First time poster, many-a-year browser. I will describe my current project in the fullest detail I can and follow it with my attempted solution. I will point out off the bat that while I have a BSc in Mathematics, I had a terrible time learning physics in high school and get...

I have a question about the effects of solar and lunar tides. I know that the effect of lunar tides is twice that of solar. However when I calculated the force of gravity of the Sun on the EArth vs the Moon on Earth using F=GmM/r^2 the force due to the Sun was much greater. Can anyone help me...

Homework Statement Given the following info: Solar output(modulus of the Poynting vector): 1.4kW/m^2 Earth radius: 6370km Average Earth orbit radius: 1.49*10^11 m Find the total power output of the Sun, power received on the Earth, and the power received in Spain if its surface area is...

Hi, I am wondering how to describe a position of our solar system to some other extraterrestrial intelligence in some distant galaxy to find us? Is it possible or not? i mean if such guidance exist for any galaxy or they have to track back movement of your probe or spaceship etc. and some...

For years I have accepted the common wisdom that "the elements making up the Earth are 4.5 bn years old, therefore the Earth is 4.5 bn years old." But, upon thinking on this during Professor Brian Cox's excellent program about the evolution of things and the fact that the solar system is...

I am now waiting to go uni after alvls. I am interested to do research about solar cell. which engineering program should I take? elelctrical, mechanical?? if my uni offer me electronics in optical engineering, should I go if I wan to research in solar cell??

I found a recent article suggesting that solar storms predicted in in the next few years pose a serious threat to the electrical grid and thus to nuclear plant cooling systems: "Severe Solar Storms Could Disrupt Earth This Decade: NOAA," International Business Times...

Can we calculate the daily energy generation of 20KW power pack if have the following information: Date Time GHI DNI DHI 01-01-2008 08:00 0 0 0 01-01-2008 09:00 149 398 75 01-01-2008 10:00 348 686 98 01-01-2008 11:00 512 792 112 01-01-2008 12:00 626 845 119...

I am trying to have students build a tester with sourceMeter, lamp, etc. for solar cell efficiency measurement. Could someone give me advice on this project? Thank you very much.

I am having my home evaluated by a SunRun, Home Depot and bpsolar consortium. There was a booth in a Home Depot store in NJ. The "deal in brief": I supply the roof area for solar and they get permits, build,install, maintain and pay for the entire solar system. Then they sell me power under...

My question is basically how can a solar cell operate in forward bias? A normal diode in forward bias (with a battery connected) drives electrons from the N-side towards the pn junction where they are continuously recombining with holes (reducing the depletion zone and allowing for the flow...

If I moved in the rest frame of a solar neutrino would I still measure neutrino oscillations? Thank you for any help!

What do you think? http://www.amnh.org/nationalcenter/youngnaturalistawards/2011/images/aidan_large_08.jpg http://ca.news.yahoo.com/blogs/good-news/teen-aidan-dwyer-uses-fibonacci-sequence-solar-energy-182220725.html

This futuristic parking system was designed by Jin Yuanbiao, Gang Tang and Su Sha especially for the all-electric vehicle dubbed Solar Coco. Both the car and the parking system boast nice design and eco-friendly features. The round-shaped vehicle hassolar panels mounted on the roof. When...

A question from Chaisson & McMillan's "A Beginner's Guide to the Universe" is as follows: If the Moon orbited Earth twice as fast, but in the same orbit, the frequency of solar eclipses would (a) double; (b) be cut in half; (c) stay the same. The answer key states that the correct answer...

Visibility of a "solar shade" from a planetary surface Hello everyone, I'm a fiction writer in the process of publishing my first science-fiction novel, and have a question which I'm having trouble answering, relating to the visibility of a "solar shade" placed between a star and one of its...

NASA has captured some incredible videos http://www.nasa.gov/mission_pages/sunearth/news/News080911-xclass.html http://www.nasa.gov/mission_pages/sunearth/news/News080411-dblpunch.html There was a big blast on June 7...

hello folks, as a last year student i have told to submit a project and so I decided to work on a solar based project. Finally i came up with an idea of making solar steam engine. I will be using two different solar collector to gain high temperature of working fluid. It will be a...

One of the all-time great science mysteries is now a step closer to explanation. The surface of the sun, known as the photosphere, can reach temperatures of 5,000 degrees. To many it would seem logical that the temperature would lower further away from the sun. But, the outer atmosphere, known...

Hi. During daytime sea water having poor solar reflectivity remains warmer than the air. But at times, water has also been found to be colder than air, with the difference being 5-10 degrees C. Can anyone please justify how could that be possible?

Hi. Can anyone please tell me what would be the solar absorptivity of a steel plate painted black? Steel has got solar absorptivity of 0.65, and black paint is around 0.97. So what will be the cumulative effect of this? Is taking average of them a logical step?

Hello! I have a difficult problem I have been working with recently. I have been trying to model the ever changing position of a solar PV array system. The system is a single axis tracker and orientates itself to have the smallest angle of incidence(AOI) to the suns beam as possible (the best...

Hi, I'm hoping someone can advise me on the best place to find the absorption spectra for water (fresh) and ice, for the wavelength range UV to IR. Also, I'm looking for the solar radiation spectrum at the surface of the Earth (i.e. after atmospheric effects have been taken into account)...

I've coded a physics simulator that simulates the solar system. Essentially it just calculates gravity between bodies and attracts them together, the most basic simulation. But obviously just feeding in positions for the sun and the planets will just have them all fall into directly each other...

I am wondering if the properties of graphene could have implications for solar sails. I don't know much about graphene but I do know that it is only an atom thick and very very strong and theoretically can be made of infinite size. Are there any problems that graphene would face in terms of...

How accurate are "simple" models of the solar system? Exactly how much effect does the perturbation of other planets have on planetary orbits? That is, if we were to take a naive model of the solar system, just applying Kepler's laws to each planet individually, with no planet-planet...

Hi, i'm attempting to simulate the Solar System in Java. I'm particularly interested in simulating orbits of celestial bodies that might enter our solar system. Therefore I need real data for my simulation. That is: x,y,z coordinates of planets with respect to the Sun (taking the sun to...

Hi all, If I have a battery bank 12V@1000A- what size solar cell (kW) will recharge this battery bank (from flat to full) over a 8 hour period?

I've been reading about terraforming and really stuck with it. Which planet /moon has the most convenient conditions, such as mass, magnetic field, gravity, intensity of sunlight for possible terraform. Venus, Moon or Mars or some else? Which one do you think? And would it be possible? Basic...

Hey guys, I'm an engineer working on the design of a small start up solar power plant. The solar power plant will operate using "solar troughs" instead of the traditional photovoltaic cells. In these systems water is the working fluid and sunlight is focused from a solar reflector onto a pipe...

Greetings- Thanks for the opportunity for a biologist to glean some info on e. engineering. My wife and I are taking over two established yurts (16' D fabric-sided shelters) used primarily for winter recreation. Current lighting from white gas lanterns. Flammable liquids that need to be...

Could you make a solar sail that derives it's energy from the decay of a radioactive element such as plutonium, uranium, or palonium? I understand that such elements radiate in all directions but if you had a 1 kg sphere of it attached to a boon which was attached to a reflective sail (e.g...

Looking at the earth-moon-sun system, it just so happens that: . The sun is ~400 times the size of our moon . Our moon is ~400 times further away from the sun than from the earth The sun and moon look ~ the same size from Earth and hence during alignment, allows the almost perfect...

Homework Statement (This is not a homework problem; it comes from a real-world problem I'm trying to solve.) Sunlight is falling on an absorptive object. What will be equilibrium temperature of the object given the solar irradiance (I) and the ambient temperature? I = solar irradiance =...

This article http://www.physorg.com/news/2011-06-big-edge-solar.html" tells about discovery of magnetic bubbles at the edge of solar system. As I understand they are around 100AU from Sun and around the size of 1AU. That makes them roughly 3.6° angular size. Shouldn't these bubbles cause...

Hey folks not sure if this is the right section but I'll give it a go... I'm trying to out find out what percentage of photons a solar cell (preferably gallium arsenide solar cells) will absorb, reflect and diffuse. I have read, from a few links, that the highest absorption rate for silicon...

AIA 304 AIA 211 AIA 171 Another Look at a Spectacular Event Now with SDO and LASCO The CMS is expected to make a glancing blow late 8 June/ early 9 June Some newspapers are predicting GPS disturbance and black-outs

Hi, I am sorry if this is in the wrong place. I had an idea of using Polymer-fullerene solar cells (http://en.wikipedia.org/wiki/Konarka_Technologies#Polymer-fullerene_solar_cells) in Mobile phones to recharge its battery using Indoor lights. But , unfortunately, these cells are of...