NASA’s Juno spacecraft continues to send back stunning images of the giant planet, including this view captured on 23 May at a distance of 7,900 kilometres (4,900 miles) during the probe’s 13th close flyby. For orientation, south is at upper left while north is toward lower right. The North Temperate Belt is the reddish-orange band just left of center, which rotates in the same direction as the planet. To the left of the belt is the bright North North Temperate Zone with high clouds likely made up of ammonia-ice or, possibly, ammonia ice and water. Darker regions are thought to be areas where clouds extend deeper into the atmosphere with warmer emissions detected by Juno’s infrared senors. Jupiter’s atmospheric bands become less evident toward the north polar regions at lower right where multiple cyclones and darker anticyclones rotate.
The Juno probe’s public-outreach camera routinely captures stunning views of Jupiter cloudtops and storms, including the Great Red Spot, seen here in an image processed by graphic artist Seán Doran. The GRS has been shrinking for years, but it remains easily the largest storm in the solar system and one still worthy of its name.
Jupiter now lies highest in the UK sky at sunset, but the Solar System’s largest planet and its four bright Galilean moons still provide plenty of observable events during June, as we reveal. If you’re uncertain which evening ‘star’ is Jupiter, the Moon conveniently passes by on the night of 3—4 June, a time when European skywatchers can also see the Moon occult (hide) bright double star Porrima.