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The Juno probe was launched in 2011.
Artist’s impression of the Juno probe approaching Jupiter. Illustration: Nasa/EPA
Artist’s impression of the Juno probe approaching Jupiter. Illustration: Nasa/EPA

Nasa spacecraft Juno skims Jupiter's clouds in record-breaking mission

This article is more than 7 years old

The probe soared 2,600 miles above Jupiter at 130,000mph, five years after leaving Earth to survey the giant planet

A spacecraft has skimmed the clouds of Jupiter in a record-breaking close approach to the giant planet. Juno activated its whole suite of nine instruments as it soared 2,600 miles above Jupiter’s swirling cloudtops, travelling at 130,000mph, on Saturday.

Nasa tweeted that Juno had successfully completed its closest ever fly-by to the planet right on schedule. It is the first of 36 such passes that the craft is scheduled to make over the next 18 months.

Rick Nybakken, Juno’s project manager at Nasa’s jet propulsion laboratory in Pasadena, California, said: “Early post-fly-by telemetry indicates that everything worked as planned and Juno is firing on all cylinders.”

Mission controllers at the space agency expect to capture stunning images and a wealth of scientific data from the approach, but it will take some days for all the data collected to be downloaded to Earth.

“We are getting some intriguing early data returns as we speak,” said Scott Bolton, principal investigator of Juno from the Southwest Research Institute in San Antonio.

Jupiter’s north polar region coming into view as Juno approaches. This view was taken when Juno was 437,000 miles away. Photograph: Nasa/PA

“It will take days for all the data to be downlinked, and even more to begin to comprehend what Juno and Jupiter are trying to tell us. This is our first opportunity to really take a close-up look at the king of our solar system and begin to figure out how he works.”

Nasa hopes to release a handful of close-up images from JunoCam, the probe’s panoramic colour camera, later this week. They should include the first detailed pictures of Jupiter’s north and south poles.

No spacecraft has flown so near to Jupiter before. The previous record for the closest approach to the planet was set by Nasa’s Pioneer 11 spacecraft, which passed at a distance of 27,000 miles in 1974.

Only one other spacecraft, Galileo, which visited Jupiter and its moons from 1995 to 2003, has orbited the planet. Although it was deliberately crashed on to Jupiter at the end of its mission, it orbited from much further out than Juno.

A colour composite taken with Junocam’s visible red, green, and blue filters. The image on the right was also taken by JunoCam, but uses the camera’s infrared filter, which is sensitive to the abundance of methane in the atmosphere. Photograph: Nasa/EPA

Powered by three huge solar panels, Juno was launched into space by an Atlas V rocket from Cape Canaveral, Florida, on 5 August 2011. It took five years to complete the 1.8bn-mile journey from Earth.

At the end of its 20-month mission, Juno will follow in the footsteps of Galileo by making a one-way plunge into the planet’s thick atmosphere.

Scientists are eagerly looking forward to analysing a treasure trove of data about Jupiter’s composition, gravity, magnetic field, and the source of its raging 384mph winds.

A British team from the University of Leicester is playing a key role in the mission, focusing on Jupiter’s powerful magnetic field, its spectacular auroras, and its dynamic atmosphere.

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