The Associated Press reports After traveling 1.7 billion miles to get to Jupiter, space probe Juno, will still be able to generate 400 watts of power, with three wings of solar panels, each the size of a truck. If in orbit around earth, solar collectors of this size would generate 25 times as much power.

Artist Rendition of Juno in Orbit Around Jupiter, Courtesy of NASA

NASA's upcoming mission to Jupiter can't get much greener than this: a solar-powered windmill-shaped spacecraft. Robotic explorer Juno is set to become the most distant probe powered by the sun. Juno is equipped with three tractor-trailer-size solar panels...

Jupiter, a planet several NASA spacecraft have studied, is so vast it could hold everything in the solar system, minus the sun. Scientists hope to learn more about planetary origins through Juno's exploration of the giant planet, a body far different from rocky Earth and Mars.

It will take Juno five years to reach Jupiter, which is five times farther from the sun than Earth. ... No spacecraft has ventured so far powered by solar wings.

Each of Juno's three wings is 29 feet long and 9 feet wide, necessary given that Jupiter receives 25 times less sunlight than Earth. The panels, folded for launch, emanate from the spacecraft much like the blades of a windmill.

At Jupiter, nearly 500 million miles from the sun, Juno's panels will provide 400 watts of power. In orbit around Earth, the panels would generate 35 times as much power.

I suspect this last sentence contains a typo, when it says Juno's solar panels would generate "35" times as much power if in orbit around the earth. Jupiter is just over five times as far from the Sun, as the Earth, so the inverse/square law suggest the ratio should be 25, not 35.

Unless, we've been on the "darker side of the sun, all this time, and didn't know it." (Spacey  humor)

Mon Aug 01, 2011 at 10:33 PM PT: BentLiberals's OND is carrying this link to a much more detailed and richer discription of Juno's mission to make detailed measurements of Jupiter's electromagnetic fields. This article is worth a full read. OND

Artist’s rendering of Juno courtesy of NASA

http://www.yourhoustonnews.com/...

By Elizabeth Zubritsky

NASA's Goddard Space Flight Center

When it comes to magnetic fields, Jupiter is the ultimate muscle car. It's endowed with the biggest, brawniest field of any planet in the solar system, powered by a monster engine under the hood.

Figuring out how this mighty engine, or dynamo, works is one goal of NASA's Juno mission, which is scheduled to begin its five-year, 400-million-mile voyage to Jupiter in August 2011. Juno will orbit the planet for about a year, investigating its origin and evolution with eight instruments to probe its internal structure and gravity field, measure water and ammonia in its atmosphere, map its powerful magnetic field and observe its intense auroras.

The magnetic field studies will be the job of Juno's twin magnetometers, designed and built at NASA's Goddard Space Flight Center in Greenbelt, Md. They will measure the field's magnitude and direction with greater accuracy than any previous instrument, revealing it for the first time in high-def.

"Mapping Jupiter's magnetic field is one of the very few ways available to learn about Jupiter's deep internal structure," says Juno's project scientist, Steven Levin of NASA's Jet Propulsion Laboratory in Pasadena, Calif., which manages the Juno mission. That's because Jupiter's atmosphere is compressed so much by its powerful gravity field that it becomes impenetrable to most sensing techniques.

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#### Comment Preferences

• ##### Tip Jar(24+ / 0-)

The means is the ends in the process of becoming. - Mahatma Gandhi

• ##### Interesting diary at this particular time;(3+ / 0-)

Order will eventually come out of chaos.....

And great leaps in progress will be made.....

Unfortunately, way too many casualties with the current agenda.....

Therefore, the rest of the world is not waiting for change or hope of change.....

http://en.wikipedia.org/...

The goal is not to bring your adversaries to their knees but to their senses. -- Mahatma Gandhi

• ##### Interesting...(3+ / 0-)

that the government is only willing to invest in renewable energy IN SPACE.

Words can sometimes, in moments of grace, attain the quality of deeds. --Elie Wiesel

• ##### Supposed to launch this Friday(4+ / 0-)

Hopefully it gets off the ground before the Tea Party tries to hold it hostage.

Here's a link to NASA's Juno website.

• ##### Thanks quaoar. Good point. The Teabaggers(3+ / 0-)

will likely demand we cut all Federal Aid for science education as a launch condition.

Along with all NASA employees  signing a statement agreeing that the Earth and Jupiter, and any dinosaurs that might be found on Jupiter, were created 6000 years ago.

The means is the ends in the process of becoming. - Mahatma Gandhi

[ Parent ]

• ##### Maybe they can make a spacecraft(1+ / 0-)
Recommended by:
HoundDog

that prays? Or worships? Or believes?

Antemedius | Liberally Critical Thinking

[ Parent ]

• ##### Hey. Fantasic idea for getting by the budget (1+ / 0-)
Recommended by:
Edger

hearing Edger.

We could name the next rockets and probes after the Apostles, and paint a picture of Jesus on the side holding up the NASA logo.

And, say we bringing the good word of the Lord to the rest of the solar system.

Not only might this get the budget doubled, but we could have phone in telethons to triple that.

The means is the ends in the process of becoming. - Mahatma Gandhi

[ Parent ]

• ##### Maybe we could (1+ / 0-)
Recommended by:
HoundDog

send Pat Robertson and that freak Fred Phelps to Jupiter?

Or farther?

Antemedius | Liberally Critical Thinking

[ Parent ]

• ##### I with you on this one Edger. (1+ / 0-)
Recommended by:
Edger

The means is the ends in the process of becoming. - Mahatma Gandhi

[ Parent ]