Questions tagged [solar-power]

Questions on obtaining electrical energy from the light of the Sun through either direct photovoltaic conversion or thermal conversion.

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7
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1answer
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what is the temperature of solar panels used in space missions such as ISS

I want to know what is the temperature range of solar panel used in space missions. What is the maximum temperature of solar panels reached in space? How does it affect the efficiency of solar panel? ...
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Can ISS fold its solar panels?

The solar panel modules of ISS use an extending central truss structure to stretch two "ribbons" of solar panels. Can that structure be re-folded in space, if need arose (for whatever reason), or is ...
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Do a significant proportion of cubesats (or any at all) have articulated solar panels/sails which can be pointed at the Sun?

It appears that for early cubesats the solar panels were simply fixed flat to the sides of the spacecraft, and even deployable panels were not part of early cubesat designs. Have a significant number ...
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For the three spacecraft now on their way to Mars plus ExoMars, how many have any solar power capability during transit?

Right now EMM Hope, Tiangwen-1 and Mars2020 are on their way to Mars and ExoMars will go next time. For these four spacecraft how many of them have any provisions to use solar power via photovoltaic ...
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Brushing clean a Mars lander's solar panels

A comment by SF. regarding the InSight Mars lander caught my attention: I really, really wonder why they didn't just include a small compartment with a duster brush grippable by the robotic arm. ...
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Mars versus the poles of Mercury WRT colonization

From MESSENGER Finds New Evidence for Water Ice at Mercury's Poles : Credits: NASA/John Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington/National Astronomy and ...
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1answer
114 views

Does the proposed Voyager Station solar power arrangement make sense?

The Gateway Foundation has proposed a rotating space station with solar panels on the "hot side" (always facing the sun)/ This is to maximize power generation and minimize heating by keeping the body ...
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How long is a day on the Moon?

I am moving to live on the Moon, I have a solar panel that only makes power when the sun shines on it. I will need to charge batteries to give me power during the lunar night. But I can't figure out ...
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Most efficient method of storing energy with water on the moon?

I found a large cavern under my lunar homestead. It is several hundred feet (a couple hundred meters) deep and fairly large. There is a large ice deposit at the bottom. I am able to warm it to ...
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Why aren't solar collectors in space solar power concepts placed closer to the sun?

I've been thinking about space solar power for quite some time, as to how it could be more profitable than ground based solar power. From all the concepts that I have seen the main problem I always ...
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371 views

Why can't the VIPER lunar rover recharge its 100-day power source using its solar panels?

Source NASA TechCrunch's NASA’s VIPER lunar rover will hunt water on the Moon in 2022 says: VIPER is a limited-time mission; operating at the poles means there’s no sunlight to harvest with solar ...
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What limits thrust-to-weight ratio of ion thusters? (beside power density of energy source)

If we consider nuclear-rocket technology not feasible (whether due to technological or political limitations), the second best options for future transportation in solar system are perhaps solar-...
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How could a fast powerful rover on Mars be powered electrically?

Background The rovers on Mars are slow and weak. If I am to believe what I read, MSL Curiosity only produces 1/6th of a horsepower electric effect, 125 watt. In order to perform tasks like deep ...
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How many discharge cycles do ISS and other LEO satellites withstand? What specific things are done to make this possible?

Batteries in our laptops and phones eventually wear out after thousands or tens of thousands of discharge cycles over the lifetime of the product, maybe a cycle ever few days. The ISS and other ...
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Why don't rockets recharge in space using solar panels while orbiting similar to ISS for deeper space travel?

I was just curious why this isn't possible because it's clearly been considered based on the existence of them in the ISS for keeping the facility online. I'd appreciate some clarity on this. Thanks a ...
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How are the silicon PV cells constructed in the ISS's solar panels? Are they as flexible as they appear here?

My understanding is that the ISS's solar panels are silicon and double sided to maximize bang-for-the-pound (average power per kilogram transported to orbit). See Are the ISS US Segment solar arrays ...
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Why is there no concerted effort to collect solar energy on a global scale?

edit and update: the assumption here is that necessary batteries for storing solar energy simply aren't available on a global scale (without intending to get into the veracity of such a statement).) ...
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Any commercial communication satellite in GEO Orbit that supports 25 KW Power?

As I understand, EchosTAR-11, built by Space systems Loral, was the first 20KW Commercial satellite. (Reference: Recent Successful satellite systems- Visions for future by D.K.Sachdev).
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Mining Helium-3 on the moon and sending it to Earth?

It would be best to mine and process material on the moon to obtain helium-3, but my question is, what if we did an unmanned mission? A small robot 1 meter long, powered by solar energy, that takes ...
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Using a solar sail to concentrate sunlight at large distances

Space probes which travel to the outer planets usually use RTGs to provide power as photovoltaic cells are impractical at those distances from the Sun. Solar sail could be used to first propel the ...
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Curiosity is still dirty! How will the ExoMARS Rover keep its solar panels dust-free and collecting sufficient power?

update: Current events makes this question even more poignant sols 5183 to 5189, Aug. 23, 2018 - Aug. 29, 2018: Team Continues to Listen for Opportunity Curiosity selfie has been released just a few ...
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Mass ratio of solar-electric versus radioisotope thermo-electric power for propulsion; beyond how many AU do RTGs win?

Solar-electric propulsion has been used several times now in deep space missions. This question explores the scalability in comparison to Radioisotope thermoelectric generation or other nuclear-based ...
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Could Stirling Engines work on sunlight alone?

With the heated side facing the sun and the rest in its own shade, could two contra-rotating Vacuum Stirling Engines and flywheels, in tandem, accumulate torque, to power a reaction wheel? Can the ...
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How many square meters of solar panel to power a MOXIE-like oxygen source per person?

If I wanted to live in a box on Mars to write my screenplay about living in a box on Mars, how many square meters of solar panels would I need to power a MOXIE-like CO2-to-O2 converter in order to ...
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559 views

Can a satellite utilize gravity gradient stabilization, solar power, electrodynamic tethering and dynamic quadrupole momentum at once?

Have any analysis been done using 2 or more devises above to function as a satellite where 1 alone would not to maintain orbit without propellants? Will this system or one with a different ...
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1answer
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How well does polymer filament survive space radiation?

I am reading Medium.com's 3D Printing Is Going to Space and Made In Space is doing something very cool. However, the point of failure in a system like this seems to be the polymer strut itself - how ...
3
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1answer
129 views

What is the benefit of rigid solar arrays over flexible ones?

I read somewhere that flexible arrays tend do waver when a satellite is rotated so it would make Earth observing satellites have 'fuzzy' pictures. But I also read that Hubble used a flexible array for ...
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Has direct bandgap photoemission from III-V solar panels on spacecraft ever been detected or reported?

I thought I had asked this question before, but I can't find it now so I will ask here. I have asked a related question in Physics SE: Do III-V based photovoltaics “glow” (photo-luminesce) when ...
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Redeployable solar arrays. Do they exist? or are they being worked on?

Has it ever been done, or is anyone working on, redeployable solar arrays? In other words, a solar cell array that can be deployed in space, used for a period, and then folded up again into the ship, ...
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Did Juno just do a plane change? If so, by how much?

There are several reports in the news that the Juno spacecraft executed a very long propulsive maneuver so that it wouldn't pass through Jupiter's shadow. Apparently it would be in dark so long that ...
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What spacecraft relied on solar electrical power farthest from the Sun?

Question: What spacecraft relied on solar electrical power farthest from the Sun? If you like you can break it down by use case; spacecraft that used it for solar-electric propulsion (and weren't ...
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1answer
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Do space solar panels use more of the solar spectrum?

Quite a bit of the EM spectrum is filtered out by the Earth's atmosphere, which means there's less incident solar energy per area on the ground that in space. There's more discussion of that topic ...
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What is the calculation for the distance VIPER can travel without recharging its batteries?

VIPER, the lunar rover NASA has developed to search for water in the permanently shadowed regions near the south pole of our Moon, will be equipped with (rechargeable) batteries to be able to drive, ...
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1answer
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Would a lower LEO ISS orbit really have a shorter eclipse duration than a higher one?

This comment says Lower orbit also mean shorter ones; for observations (one of the ISS missions) it is an advantage. It also have shorter night times (ie smaller batteries).. and the likely ...
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1answer
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What exactly has “changed” about the way that NASA will procure technology for the Artemis program?

A video in the Space.com article NASA Taps Maxar to Build Lunar Gateway Power Module for Artemis Moon Plan shows the NASA director explaining the series Artemis 1, 2, 3... and announcing that the ...
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Power supply for StarShip?

Early renderings of the Mars Colonial Transport showed 2 fan shaped solar arrays deployed while in space. I haven seen any depictions of the StarShip with a solar array either in orbit or standing on ...
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Why does the ISS not use the most efficient solar panels available?

In this question, Geoffc's answer stated that the ISS solar arrays are about 14% efficient. Higher efficiency panels were available when these arrays were manufactured. Given the high cost per pound ...
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Peltier cell as solar cell in space

There's a related question: In space can the difference in temperature between the inside and outside, provide useful energy? The problem with that one is that it relies on the concept of "hot inside"...
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1answer
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Power generation from cosmic rays or particles?

A random thought occurred to me: Can we harness the energy from cosmic rays or particles or deadly radiation that's found (in space) just like we do for solar energy?
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Why can't solar panels work eternally for any space probe?

I was just thinking about this that as all probes have solar panels attached to them so why do they have to shut down at the last stage, So I googled and found that dust sticks to panels because of ...
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1answer
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Will the Rosalind Franklin (ExoMars) rover solar panels be able to clear themselves of dust by tilting?

The BBC News item 'Rosalind Franklin' Mars rover assembly completed contains a short video, and I show some screen shots below. It looks like the panels unfold twice, from two stacks of three, to six ...
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Function of the separated, individual solar cells on Telstar 1 and 2? Why were they “special”?

The image below shows a part of a backup satellite for Telstar 1 and 2. In addition to the many small and highly segmented solar panels, there are what look like individual elements of the same kind ...
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28V vs. 124V on the ISS

Apparently the US segment of the ISS runs on 124v DC, while the Russian segment is on 28v DC. Why the difference? I understand it is often safer to have several different voltages rather than one, but ...
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Lightest possible solar array?

I'd like to know what is the lightest possible solar array per unit power with current or near future technology. The arrays I have been able to find: Vanguard Space THINS 400-500 W/kg (2014; thin ...
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Will the Mars helicopter be able to remove the dust from solar panels?

Athough i'm not that worried about Insight's solar panels that i didn't sleep well because of that, this question got me thinking ! The Mars Helicopter Scout is a planned robotic helicopter that ...
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1answer
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What is InSight's one-sol energy budget on a good day?

I am still worried about InSight's solar panels getting covered in dust: Why do InSight's solar panels have tall vertical ridges between segments - will these trap dust? Please help me to sleep ...
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What criteria dictate solar panel design?

On space craft equipped with solar panels, those panels comes with various form factors and number. 2 straight rows (e.g. progress, rosetta,...) more straight rows (e.g. ATV, Juno,...) only one ...
9
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Manufacturing solar cells on the Moon

How practical is it to manufacture solar cells on the Moon? I understand there is a lot of silica there, and in theory if we could robotically make and deploy solar cells on the Moon, then we would (...
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Why didn't Gemini, Apollo or STS use solar panels?

Short-duration flights (Vostok, Voskhod, Mercury) use several-kWh batteries. Space stations use photovoltaic cells for their high power-to-weight ratio. The longest mission duration accomplished with ...
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How could a satellite follow earth around the sun while staying outside of earth's orbit?

I'm wondering if its possible for a satellite to follow earth around the sun while staying outside of its orbit. I wondering for the sake of space based solar infrastructure or just something ...