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Όλα αναρτήθηκαν από Fred Ley
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Τμήμα του ναού με τη σύνοδο.
Ο Fred Ley σχολίασε σε Ηλίας Χασιώτης για αστροφωτογραφία Διαβάσεις και Επιπροσθήσεις
Ah-ha!!! Sneaking off to Ialy to get those exotic images. To bad one can't go inside the temple in order to capture the conjunction between the columns. The images turned out real nice. I was thinking of doing that yesterday at the Ancient Agora, where I work, but i did not have my tripod with me and I also did not have my better quality Sony digital camera with me. So I posted an "attempted" image that shows "I was there". -Fred -
Conjunction of Venus, Moon & Jupiter
Ο Fred Ley σχολίασε σε Fred Ley για αστροφωτογραφία Διάφορες αστρονομικές φωτογραφίες
Thanks for the compliment. You know, I 've been taking photographs for decades and have had many persons comment on the quality of my images. I have never studied photography, just a natural built in talent-if I may call it that. I went a Googled "the rule of thirds" as I have never heard of it prior to reading your feedback. Oh well, you always learn something new every day. Makes life interesting. -Fred -
Conjunction of Venus, Moon & Jupiter
Fred Ley δημοσίευσε μία αστροφωτογραφία σε Διάφορες αστρονομικές φωτογραφίες
Here is a quick little shot that I took after work. With the temple of Hephestus to the right and the conjunction in the upper left. Took this with a small Sony, model DSC-5780, 8.1 megapixle camera. The image is unaltered. Did not have a tripod with me, so the quality is not exactly the best. -Fred -
I ran across my June 1959 issue of Scientific American the other day. On the cover is a photograph of the Antikythera Mechanism. There is an eight page article talking about the mechanism. I gather that some of the information in the article may be outdated, but if anyone wants a copy, I can send it by e-mail. I did scan the article at a large file size. If one would like a smaller file size, please let me know. -Fred
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Σελήνη και αστεροσκοπείο Πεντέλης
Ο Fred Ley σχολίασε σε ammonite για αστροφωτογραφία Σελήνη wide field
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"Βραδιές Κοινού-Αστρονομία για όλους"
Fred Ley απάντησε στην συζήτηση του/της B.D. Foxmoor σε Η αστρονομία στην Ελλάδα
I just saw this this morning, printed it out and then discovered that the event was held yesterday. Oh well, I have next month to look forward to. Hey, I wonder if they'll let us look throught the telescope? -Fred -
Κιθαιρώνας 1-1-2008 2
Ο Fred Ley σχολίασε σε themis_kart για αστροφωτογραφία Αστρονομικές δραστηριότητες
This image takes me back to 1977 and a particular scene from the movie "Close Encounters of the Third Kind" where the people of a village in India are asked from where did the sound and lights come from at night and everyone pointed their finger, in usion, towards the sky. Apart from that it looks like you all had a great time. Was the wind behaving? -Fred -
Σελήνη-Αφροδίτη
Ο Fred Ley σχολίασε σε spartiatis για αστροφωτογραφία Πλανητικές Συναντήσεις και Σύνοδοι
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For those of you that have an interest in manned space flight, there appeared a news article in the Antelope Valley Press, our local newspaper back in Lancaster, on October 31, 2008, about the Orion capsule. It is undergoing certain evaluative testing at the NASA Dryden center at Edwards Air Force Base in southern California. NASA Dryden has a web site located at... http://www.nasa.gov/centers/dryden/home/index.html Here is the article for those who may find it to be of interest... ROAD TEST - The Orion crew module, which eventually will carry six astronauts to the International Space Station by no later than 2014, is being tested at NASA/Dryden at Edwards Air Force Base. Similar to the Apollo capsule, the Orion is 16 feet in diameter and will parachute to earth. RON SIDDLE/Valley Press -------------------------------------------------------------------------------- EDWARDS AFB - A large, rounded spacecraft stands in the middle of a hangar, balanced atop a knife edge at its diameter, when someone pushes its side and very gently begins to rock it back and forth. It may not look like high-tech aerospace testing, but it is. The spacecraft in question is a replica of the planned Orion crew capsule, the nation's next-generation manned spacecraft that is intended to replace the space shuttle fleet to take astronauts to the international space station and the moon. It is undergoing testing at NASA Dryden Flight Research Center in preparation for flight tests of the launch abort system beginning next year. The launch abort system is designed to safely pull the crew capsule away from the launch rocket during an emergency, either while on the launch pad or shortly after take-off. A rocket attached to the top of the crew capsule, which itself is stacked atop the Ares I launch rocket, would fire in an emergency, pulling the capsule a mile high and a mile away in seconds. The capsule would land a safe distance away, descending with the use of parachutes. "That would remove the crew from any danger that would be caused by an emergency on the launch pad or in the early stages of the launch itself," said Gary Martin, Dryden's project manager for the Orion Abort Flight Test. During a successful launch, the abort system would be jettisoned once the capsule reached 200,000 feet altitude. Dryden has an integral part in the flight tests of the launch abort system, which will take place at White Sands Missile Range in New Mexico. A "boilerplate" Orion capsule - one with the same dimensions and aerodynamic properties of an actual capsule but without the interior systems - is being used for the initial testing to determine how the launch abort system will function in flight. Later flight tests will use prototypes of the Orion capsule. During the past month, engineers at Dryden have been conducting tests on the boilerplate capsule to determine the vehicle's mass properties - issues such as weight, center of gravity and mass distribution. "Our ability to control it depends on how the weight is distributed," Martin said. The tests in which the capsule is rocked while balancing on a knife edge were to determine its moments of inertia - how resistant the object is to changes in rotation. "It's important to know in our control systems design," said Tom Horn, chief of the aerostructures branch at Dryden. The 14,000-pound capsule's motion was measured by instruments. "We're looking for pretty smooth motion and the nice oscillation it would normally go through," said Cathy Bahm, Dryden's deputy project manager for crew module and integration. The data collected during this month's series of tests will be used to verify the computer models engineers use to predict the capsule's performance. "We can compare our measured performance to our modeled performance," Martin said. If the actual data gathered matches that created in the computer model, program officials can have greater confidence in the accuracy of the models to predict performance for future test articles. "These are characteristics that don't change in flight," Bahm said. NASA plans four, possibly five, flight tests of the launch abort system. The first, scheduled for no earlier than April, will simulate an abort on the launch pad. The next two will simulate an emergency as the launch rocket ascends, with a possible third ascent abort test depending on the results of the first two. These will use a smaller rocket booster - not a full-scale launch rocket - mounted beneath the test capsule to propel it The final test is expected to be a second launch pad abort scenario. The first flight test in the spring will use the vehicle now undergoing testing at Dryden. Later tests will use additional models that more closely resemble the production version of the system, accommodating more recent changes to the design. With the mass properties testing complete, the boilerplate capsule will be taken apart in order to install avionics and instrumentation for the flight testing. The test capsule will be moved to the test site at White Sands Missile Range, N.M., in February, where it will be joined with the launch abort system. Much like the Orion capsule itself, the launch abort system counts the Apollo space program as a direct ancestor. However, because the new capsule is about twice the size of the Apollo spacecraft, the weight constraints for the newer system are different, Martin said. Data collected during these flight tests will be used to help certify the crew capsule for human spaceflight, he said. As the Dryden team prepares the capsule for flight test, they also are preparing the mobile control room that not only will control the test flights but also will collect data from the flights and ground testing. The $1.5 million mobile facility carefully is packed into a standard 53-foot trailer so it easily may be transported to the test site at White Sands Missile Range, said Sam Kim, deputy operations lead on the project. Crew capsule put through paces Dryden testing Orion replica, heir to shuttle This story appeared in the Antelope Valley Press Friday, October 31, 2008. By ALLISON GATLIN Valley Press Staff Writer
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After spending 1,000 days on its journey to Pluto and the Kuiper Belt, the New Horizons team decided to reveal the secret stowaways onboard the spacecraft. They are nine objects (can you guess why there are nine objects?) that were attached to the spacecraft for the ten year journey to Pluto. To see what the stowaways are go to the link below. http://www.universetoday.com/2008/10/27/stowaways-revealed-on-new-horizons-spacecraft/#more-20155 -Fred
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Barlow Η Powermate?
Fred Ley απάντησε στην συζήτηση του/της Alexandros164 σε Πού και πώς να αγοράσω;
Hi Alexandros, OK, here's my two cents worth. With the Powermate you can't go wrong as Tele Vue turns out a high quality product. With many other barlows on the market, just like cars, some are really great while others are lemons-simply not worth it. You might find it easier going to a star party, or if any of your fellow observing buddies have barlows, look through the various barlows in an attempt to reach a positive conclusion. From time to time, technical reviews in various astronomy magazines may also be of assistance. Hope this is of some help to your question. Clear Skies, -Fred -
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Κατασκευη οκταγωνικου παρατηρητηριου
Fred Ley απάντησε στην συζήτηση του/της Aggelos Kechagias σε Mastrovox
Hi Aggelos, I am cetain that you have thought of this, but do not forget to waterproof the wood for the rainy season. I'd hate to see the wood rot away. Oh well, my two cents worth. By the way, it looks great can't wait to see the finish product. -Fred -
To read about the Orion region 2frame mosaic, hydrogen alpha(test)
Ο Fred Ley σχολίασε σε SAKIS για αστροφωτογραφία Νεφελώματα
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Μετεωρικοί κρατήρες στην Ελλάδα;
Fred Ley απάντησε στην συζήτηση του/της KOMIS σε Αστρονομία, Αστροφυσική και Κοσμολογία
I hope that I will be in position to be able to tag along with the next outing to the "crater". How was the geology of the area? Any signs of the rock strata being uplifted and or overturned? Don't forget that if this does prove to be meteoritic in origin, remnants of the impact will be scattered for miles around the crater. OK-"...scattered for kilometers around the crater." Does anyone know where the Geological unit of the government is located? Perhaps a Google search is in order. Perhaps they have a high resolution map of the area that can be obtained. -Fred -
Hah! I think that pretty soon we'll all be confused. How about this - last week I received my July issue. I don't know if it is a double mailing or not. I 'll have to check. I figure that some one probably pressed the wrong button on a keyboard and that is was the cause of this issue. -Fred
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You'll never guess... Yup, that's right-my October issue showed up! Lets see what happens with the November issue. -Fred
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Μετεωρικοί κρατήρες στην Ελλάδα;
Fred Ley απάντησε στην συζήτηση του/της KOMIS σε Αστρονομία, Αστροφυσική και Κοσμολογία
Hey Everybody, how did the crater investigation go? Do we have a possible winner or are we looking at some volcanic residue? Everyone make it back ok? I guess I'll have to be patient and wait to hear the report. -Fred -
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