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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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Do solar panels on satellites gather dust and need cleaning?

As a follow-up to Does cosmic dust pose a problem for long-term satellites, telescopes and probes?, assuming satellite's long duration stay in Earth's orbit – let's for the sake of argument assume a ...
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Could a solar thermopile be enough to power a small satellite?

It seems that a nuclear thermoelectric generator was used to power spacecrafts for some exploration missions. Can a thermopile that harvest the light/shade temperature difference on Earth's orbit be ...
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Will space-based energy beamed to earth increase heat on earth?

A Japanese paper on beaming energy from solar installation on the moon to earth via laser and microwave recently made the rounds in the media. Would this, or any space-based energy system cause a net ...
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How long could Solar Impulse fly in the Venerean atmosphere?

Extremes of temperature, and pressure serve to effectively constrict the life-span of a PV cell on the Venerean surface. Despite the cloud cover, the Venus' proximity to Sol makes for upto 1km ...
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1answer
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What is the average intensity of sunlight on the Venerean surface?

A follow-up to How much more power does a PV cell generate in Venerean orbit? NASA writes to say about Venera 8 ... measured the light level as being suitable for surface photography, finding it ...
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1answer
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Does Juno use MPPT?

MPPT aka Maximum Power Point Tracking is an active mechanism to collect maximum power a PV cell may deliver. This is typically achieved by varying the resistive load connected to a cell. Juno will ...
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1answer
628 views

How much more power does a PV cell generate in Venerean orbit?

Spacecraft in terrestrial Solar System typically use PV cells to power their instruments. As the referenced Wikipedia article writes, Photovoltaics (PV) is a method of generating electrical power ...
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Why does Curiosity use an RTG rather than solar (as Spirit and Opportunity do) for power?

Why did Curiosity choose to go with nuclear power? While solar panels have issues with Martian dust, this was a known factor before the 2004 Spirit and Opportunity mission. Why then did the 2004 ...
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951 views

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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How far from the Sun can solar power be used as a reliable energy source?

Space probes headed for the far reaches of our Solar System rely on radioisotope thermoelectric generators for power (Cassini–Huygens, Voyager 1, Voyager 2). Presumably this is because solar power ...