Journey to Jupiter: NASA spacecraft nears planet rendezvous

[webfact]

Journey to Jupiter: NASA spacecraft nears planet rendezvous
By ALICIA CHANG

LOS ANGELES (AP) — Jupiter takes center stage with the arrival next week of a NASA spacecraft built to peek through its thick, swirling clouds and map the planet from the inside out.

The solar-powered Juno spacecraft is on the final leg of a five-year, 1.8 billion-mile (2.8 billion-kilometer) voyage to the biggest planet in the solar system.

Juno promises to send back the best close-up views as it circles the planet for a year. Jupiter is a gas giant made up mostly of hydrogen and helium unlike rocky Earth and its neighbor Mars. The fifth planet from the sun likely formed first and it could hold clues to how the solar system developed.

A look at the $1.1 billion mission:


THE ARRIVAL

As Juno approaches Jupiter late Monday, it will fire its main rocket engine to slow down and slip into orbit around the planet. This carefully orchestrated move, all preprogrammed, is critical because Juno will zip past Jupiter if it fails to brake. The engine burn — lasting about a half hour — is designed to put Juno on a path that loops over Jupiter's poles.

Since it takes 48 minutes for radio signals from Jupiter to reach Earth, mission controllers at NASA's Jet Propulsion Laboratory in Southern California won't be able to intervene if something goes awry. They'll watch for beeps from Juno that'll signal whether the engine burn is going as planned.

"Everything's riding on it," Juno chief scientist Scott Bolton said Thursday during a press briefing.

THE MISSION

Spacecraft have visited Jupiter since the 1970s, but there are still plenty of questions left unanswered. How much water does the planet have? Is there a dense core? Why is its signature Great Red Spot — a hurricane-like storm that has been raging for centuries — shrinking?

During the mission, Juno will peer through Jupiter's dense clouds, flying within 3,100 miles (5,000 kilometers), closer than any other spacecraft.

The goal "is learning about the recipe for how solar systems are made," said Bolton, who's from the Southwest Research Institute in Texas.

Earlier visitors included the Voyagers and Pioneers, Galileo, Ulysses, Cassini and most recently, New Horizons, which reached Pluto last year. Most were quick flybys en route to other destinations. Only Galileo — named for the Italian astronomer who discovered Jupiter's large moons — orbited the massive planet and even released a probe.

THE SPACECRAFT

Named after the cloud-piercing wife of the Roman god Jupiter, Juno carries nine instruments to map Jupiter's interior and study its turbulent atmosphere. Also stowed aboard are three mini figures of Jupiter, Juno and Galileo designed by the Lego Group. The Italian Space Agency donated a plaque inscribed with Galileo's writings.

Previous trips to Jupiter have relied on nuclear power because of the distance from the sun. Juno is the first spacecraft to venture this far out on solar power. Juno, about the size of an SUV, has three tractor-trailer-size solar wings that extend outward like blades from a windmill. The solar panels are designed to face the sun during most of the mission.

After its launch on Aug. 5, 2011, Juno took a roundabout journey to Jupiter, swinging around the inner solar system and using Earth as a gravity boost to the outer solar system.

THE PICTURES

The Hubble Space Telescope and other spacecraft have returned stunning pictures of Jupiter, including a new photo released Thursday of its northern lights. But scientists said the best views are yet to come. Juno will get in closer and will provide the most detailed look at the planet's polar regions, clouds and auroras.

The camera onboard — the JunoCam — has been snapping pictures of Earth, Jupiter and its moons along the way. But the camera and other instruments were turned off this week to avoid any interference during the critical arrival. So there won't be images at the nail-biting moment when Juno enters orbit around Jupiter.

The public can also vote on where to point the camera. NASA has said pictures from the mission won't be publicly released until at least late August.

THE FINISH

Once Juno wraps up its work, it will deliberately dive into Jupiter's atmosphere and burn up. The fiery finale — expected in 2018 — ensures that the spacecraft doesn't accidentally crash into Jupiter's moons, particularly the icy moon Europa, a prime target for future missions.

___

Online: Mission page: http://tinyurl.com/Jupitermission


-- (c) Associated Press 2016-07-01

[SOTIRIOS]

.....'space program'......$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$........

[Buzzz]

Actually the space program has produced a windfall of benefits in science, technology and engineering that touch nearly every aspect of our lives, including this conversation.

Edited July 1, 2016 by Buzzz

[daveAustin]

... and is more important than building bombs and killing people. Some folk just don't get it. I feel sorry for them.

[Trouble]

No telling what the world could accomplish if we worked together instead of the constant global geo-political chess game we play fighting among ourselves.

[GOLDBUGGY]

No Big Deal!

When we finally learn to travel at the speed of light we can be there taking pictures in 48 minutes. Less time then it takes the wife and I to go shopping.

I do wonder what our sun looks like from their. Probably nothing compared to what we see from here but also a lot bigger and brighter than any planet or star we can see from here with the naked eye.

[Buzzz]

The televised series, MOON MACHINES, takes a close look at the engineering that put together the sophisticated pieces of technology that led to the moon landing, exploration and safe return.

Incredible stuff:

[manfredtillmann]

perhaps the little spaceship will discover a large, black, rectangular monolith or two...

[KhunBENQ]

In my younger days I shared this enthusiasm for such pure research.

Nowadays I wish they would invest more in solving the earthly problems.

[KhunBENQ]

Actually the space program has produced a windfall of benefits in science, technology and engineering that touch nearly every aspect of our lives, including this conversation.

I hope you don't want to say the internet is a windfall of space research.

As many other technological improvements it's based on military research.

This "windfall from the space program" is much over estimated.

[DLang]

Should have a craft finding out what's inside Europa.

[KittenKong]

In my younger days I shared this enthusiasm for such pure research.

Nowadays I wish they would invest more in solving the earthly problems.

Nearly all earthly problems are caused by one thing: massive overpopulation of humans.

The solution is simple and requires no research: dispose of 90% of the people and give the planet a chance to recover.

Any other approach is doomed to failure.

[manfredtillmann]

In my younger days I shared this enthusiasm for such pure research.

Nowadays I wish they would invest more in solving the earthly problems.

Nearly all earthly problems are caused by one thing: massive overpopulation of humans.

The solution is simple and requires no research: dispose of 90% of the people and give the planet a chance to recover.

Any other approach is doomed to failure.

fully agree. you first, me second...

[Rancid]

Better money spent on space exploration that bloated militaries.

Amazing the scientific skills to achieve these journeys.

[Songlaw]

In my younger days I shared this enthusiasm for such pure research.

Nowadays I wish they would invest more in solving the earthly problems.

Nearly all earthly problems are caused by one thing: massive overpopulation of humans.

The solution is simple and requires no research: dispose of 90% of the people and give the planet a chance to recover.

Any other approach is doomed to failure.

Not to worry. 'They' already have an app for that called, "The Georgia Guidestones."

[Skeptic7]

In my younger days I shared this enthusiasm for such pure research.

Nowadays I wish they would invest more in solving the earthly problems.

Nearly all earthly problems are caused by one thing: massive overpopulation of humans.

The solution is simple and requires no research: dispose of 90% of the people and give the planet a chance to recover.

Any other approach is doomed to failure.

Tad bit extreme, but readily available, affordable and encouraged birth control and abortion options...PLUS strictly enforced mandatory worldwide limit of 2 children per family would be a good start. Sadly, colonizing the moon or another planet is way more likely than any real solutions...

[Guest]

Actually the space program has produced a windfall of benefits in science, technology and engineering that touch nearly every aspect of our lives, including this conversation.

Exactly. Space programs are on the edge of our knowledge and do a lot of good to push the border what we can do further.

The material costs of the blob of equipments of this probe and the cost of fuel to get it to the Jupiter were probably around few million dollars. All the rest of the $1.1 Billion was spend here on Earth. The money spent to the mission also stays here.

The same applies to the basic physic research done in CERN and other locations. These ventures give us new stepping stones to get further with our knowledge. At some point we'll enjoy what has become from these experiments.

[BuaBS]

It's just Jupiter , yawn , now Uranus , that sounds interesting .

[Guest]

Nonsense: Our expance of understanding of the Universe should be priority,

Edited July 1, 2016 by Guest

[tandor]

.....'space program'......$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$........

..educational..at least the aliens will have some Lego to play with.

[tandor]

It's just Jupiter , yawn , now Uranus , that sounds interesting .

...that's bottom of the list.