“Looping through the Jovian system in the late 1990s, the Galileo spacecraft recorded stunning views of Europa and uncovered evidence that the moon’s icy surface likely hides a deep, global ocean. Galileo‘s Europa image data has been remastered here, using improved new calibrations to produce a color image approximating what the human eye might see. Europa’s long curving fractures hint at the subsurface liquid water. The tidal flexing the large moon experiences in its elliptical orbit around Jupiter supplies the energy to keep the ocean liquid. But more tantalizing is the possibility that even in the absence of sunlight that process could also supply the energy to support life, making Europa one of the best places to look for life beyond Earth. What kind of life could thrive in a deep, dark, subsurface ocean?” — Via APOD: Astronomy Picture Of the Day
The year’s final public stargazing session hosted by the Cuyahoga Astronomical Association (CAA) will take place Saturday, October 5, from 8:00 to 10 p.m. at our Letha House Park West observatory site.
Given good sky conditions visitors will be able to view Jupiter, Saturn, star clusters, and Earth’s Moon. In fact, the date coincides with International Observe the Moon Night: a worldwide appreciation of our world’s nearest neighbor in space.
The event is free, open to the public, and is conducted as an “open house” — visitors may arrive and depart at any time during the event’s hours. The CAA’s observatory will be open and association members also will be on hand to share views through their personal telescopes.
An interesting activity any time of year is to make note of the daily changes we see in the phases of Moon. Open the PDF to print a handy guide and journal for lunar observation: Moon Observation Journal.
To find our observatory, and what to expect with a “star party,” visit the following: https://cuyastro.org/caa-observatory/
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.
by William Murmann, CAA President
We had one of our most successful public star parties for the Medina County Park District last night (July 29) at Letha House. I don’t have an exact count, but I think 100 or more guests came for the event under great clear skies and mild temperatures. The parking lot was full. Lots of young families came with children, many of whom got their first look at the Moon, Jupiter, Saturn, and other objects through a telescope.
Many thanks to all who helped! Observatory Director Jay Reynolds had a busy night showing the night sky with our 12-inch and 8-inch scopes. Education Director Nora Mishey spent the whole evening in the building, talking with folks about her educational astronomy displays, sharing home-baked cookies, and discussing our club. Three platters of Nora’s cookies quickly disappeared.
We had 14 scopes at the event. Two of them were brought by nonmembers who hopefully will join our club. I was busy during the evening talking with people and showing the Moon with my scope, so I may not have a complete list of members who helped. If I missed anyone, please let me know.
A big thank you for helping to VP Tim Campbell, Bob Wiersma, James Guilford, Alan Studt, Rich & Nancy Whisler, Bill & Carol Lee, Carl Kudrna, Dave Nuti, Chris Christie, Bruce Lane, Jay Reynolds, Nora Mishey, and me. If you were there and I missed you, please let me know.
Thanks again everyone!