Among the most striking features in the image are the rich colors of the clouds moving toward the Great Red Spot. This huge anticyclonic storm is roughly the diameter of Earth and is rolling counterclockwise between two bands of clouds that are moving in opposite directions toward it.
As with previous images of Jupiter taken by Hubble, and other observations from telescopes on the ground, the new image confirms that the huge storm which has raged on Jupiter’s surface for at least 150 years continues to shrink. The reason for this is still unknown so Hubble will continue to observe Jupiter in the hope that scientists will be able to solve this stormy riddle. Much smaller storms appear on Jupiter as white or brown ovals that can last as little as a few hours or stretch on for centuries.
The worm-shaped feature located south of the Great Red Spot is a cyclone, a vortex spinning in the opposite direction to that in which the Great Red Spot spins. Researchers have observed cyclones with a wide variety of different appearances across the planet. The two white oval features are anticyclones, similar to small versions of the Great Red Spot.
The Hubble image also highlights Jupiter’s distinct parallel cloud bands. These bands consist of air flowing in opposite directions at various latitudes. They are created by differences in the thickness and height of the ammonia ice clouds; the lighter bands rise higher and have thicker clouds than the darker bands. The different concentrations are kept separate by fast winds which can reach speeds of up to 650 kilometers per hour.
These observations of Jupiter form part of the Outer Planet Atmospheres Legacy (OPAL) program, which began in 2014. This initiative allows Hubble to dedicate time each year to observing the outer planets and provides scientists with access to a collection of maps, which helps them to understand not only the atmospheres of the giant planets in the Solar System, but also the atmosphere of our own planet and of the planets in other planetary systems.
The Cuyahoga Astronomical Association (CAA) will, once again, be a major activity at the city of Lakewood’s annual Summer Solstice Celebration. The event takes place in Lakewood Park and on the park’s lakefront Solstice Steps feature on Thursday, June 21 from 6:00 to 10:30 PM.
Operating within the constraints of sunlight and twilight viewing conditions, club members will set up their telescopes and offer public viewing of Sun, Moon, and planets. Planets Venus and Jupiter will be readily visible, given clear skies, as will be the Waxing Gibbous Moon. Some fainter objects may be viewed later.
CAA member Jay Reynolds is coordinating the club’s participation with organizers of the very popular celebration.
An event flyer is available here: Lakewood Summer Solstice Celebration
The Cuyahoga Astronomical Association (CAA) will host a public star party this Saturday (Sept. 9) from 8:00 to 10:00 PM at the Medina County Park District’s at Letha House Park (West). The club’s observatory will be open and CAA members will offer viewing through their personally-owned telescopes.