The US space agency (Nasa) says its Juno probe is on course to go into orbit around the Planet Jupiter.

 

The satellite is described as healthy and ready for what scientists concede will be a risky manoeuvre, BBC repots.

 

Juno has to execute a precise rocket firing to slow itself sufficiently to get captured by the giant world's gravity.

 

If it succeeds, researchers should get their best ever view of what lies beneath Jupiter's stormy clouds.

 

The 35-minute orbit insertion burn - timed to to start at 03:18 GMT on Tuesday - is sure to jangle the nerves of everyone here in mission control at the Jet Propulsion Laboratory (JPL) in California.

 

If the engine fails to fire at the right time or for an insufficient period, this $1.1bn (£800m) venture will simply fly straight past Jupiter and into the oblivion of deep space.

 

Juno will not have its main dish pointed at Earth during the braking procedure, so the mission team will have to follow events via a series of simple tones sent back through the probe's low-gain antenna.

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