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  • Blogs | astrofoto.org
    same sentence Read more about astrofoto org migrated to new host Roland Roberts s blog Log in to post comments Saturn Week Submitted by Roland Roberts on Tue 09 29 2009 11 45 Well okay I made that up But the first two weeks of October say Oct 4 17 will be a great time to be up early to view Saturn Mercury and Venus as they dance around the early morning sky during the morning twilight Saturn will actually be the faintest of the bunch On Oct 16 the crescent moon will have joined the fray and there will be a nice visual grouping of the three planets with the moon Read more about Saturn Week Roland Roberts s blog Log in to post comments Urban Starfest on Saturday Submitted by Roland Roberts on Fri 09 25 2009 10 53 If you are New York City this weekend is the annual Urban Starfest held in Sheep Meadow Central Park While those of you from more rural areas may think it something of a joke to have a mini star party in the middle of the a major city you would be surprised at what you can see Of course at this time the first quarter moon and Jupiter are easily visible in the early evening and those alone are worth the trip out if you or your children have never looked at them through a telescope And with some of the scopes the brighter deep sky objects will be readily d Read more about Urban Starfest on Saturday Roland Roberts s blog Log in to post comments astrofoto org down time Submitted by Roland Roberts on Mon 08 31 2009 02 10 I had a rather long outage due to a botched upgrade from which I am still recovering I had planned on upgrading from Fedora 8 to 9 then 10 and finally 11 You have to upgrade incrementally but the first step failed part way through after having started installing packages An attempt to retry crashed even earlier At that point I decided to try a clean install of Fedora 11 while preserving my data partitions then recover configuration files from backup That failed too Sigh Read more about astrofoto org down time Roland Roberts s blog Log in to post comments Pages first previous 2 3 4 5 6 7 8 9 10 next last Navigation Calendar Gallery Constellations Messier Objects M27 The Dumbell Nebula Resources Astronomy Books Buying A Star Buying A Telescope Clubs and Organizations General Interest Imaging and Astrophotography Magazines Mailing Lists and News Groups Science Toy Suppliers Software Weather Information Tips and Tricks Roland s Corner Recent content About Copyright Search form Search User login Username Password Request new password Science Daily Mercury Mercury gets a meteoroid shower from Comet Encke Mercury gets a meteoroid shower from Comet Encke More Science Daily Venus The aliens are silent because they re dead The aliens are silent because they re dead More Science Daily Mars

    Original URL path: http://www.astrofoto.org/blog?page=5 (2016-02-13)
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  • Blogs | astrofoto.org
    four days going there nice and casual but drove back in a hurry taking only two days very long days for driving Read more about Traveling Time Roland Roberts s blog Log in to post comments Rain Rain Go Away Submitted by Roland Roberts on Sun 06 21 2009 00 20 This has been the rainiest June I can remember While I ve really been too busy to have much time to get out under the stars such as they are here in Brooklyn even when I did have time it has rarely been possible Read more about Rain Rain Go Away Roland Roberts s blog Log in to post comments NEAF and NEAIC Until Next Year Submitted by Roland Roberts on Mon 04 20 2009 11 32 We returned last night tired but happy from this year s NEAF conference The vendor turn out was good and overall attendance appeared good too although it was little hard to tell from our perspective We spent most of the two days in the children s area helping with the various activities including a comet demonstration followed by a craft activity making 3D constellation models Orion and the Big Dipper some informal demonstrations to understand the moon s phases constructing spacecraft models and more Alas I did not get to attend the showing of Mars 3D a new movie which made its debut at the show so I guess I will have to wait for it to be officially released Read more about NEAF and NEAIC Until Next Year Roland Roberts s blog Log in to post comments NEAIC Tonal Mapping Submitted by Roland Roberts on Fri 04 17 2009 09 53 J P Metsainio is giving a talk on his techniques for using narrow band imaging to produce very sharp high contrast color images The technique appears to be a very clever application of the idea of using lower resolution in the color channels and blurring the noise to reduce grain Read more about NEAIC Tonal Mapping Roland Roberts s blog Log in to post comments Pages first previous 3 4 5 6 7 8 9 10 11 next last Navigation Calendar Gallery Constellations Messier Objects M27 The Dumbell Nebula Resources Astronomy Books Buying A Star Buying A Telescope Clubs and Organizations General Interest Imaging and Astrophotography Magazines Mailing Lists and News Groups Science Toy Suppliers Software Weather Information Tips and Tricks Roland s Corner Recent content About Copyright Search form Search User login Username Password Request new password Science Daily Mercury Mercury gets a meteoroid shower from Comet Encke Mercury gets a meteoroid shower from Comet Encke More Science Daily Venus The aliens are silent because they re dead The aliens are silent because they re dead More Science Daily Mars Antarctic fungi survive Martian conditions on the International Space Station Antarctic fungi survive Martian conditions on the International Space Station Rotation speed may be bad news for Red Planet pioneers Rotation speed may be bad news for Red Planet

    Original URL path: http://www.astrofoto.org/blog?page=6 (2016-02-13)
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  • Blogs | astrofoto.org
    back in synch Read more about Pendulums Roland Roberts s blog Log in to post comments How Fast is Sound Submitted by Roland Roberts on Thu 02 05 2009 17 12 A few months ago I read an article in The Physics Teacher published by the American Association of Physics Teachers on measuring the speed of sound using a couple of microphones hooked up to a computer s line in jack Apart from having to make a trip to Radio Shack to buy some parts to convert two standard unpowered microphones into a pair of powered microphones for stereo input the process was amazingly straightforward I did a quick proof of concept in the dining room one evening and go Read more about How Fast is Sound Roland Roberts s blog Log in to post comments Ansel Adams Trivia Submitted by Roland Roberts on Fri 01 30 2009 11 31 I just read this in Astronomy Beat 15 a publication of the Astronomical Society of the Pacific Read more about Ansel Adams Trivia Roland Roberts s blog Log in to post comments 365 Days of Astronomy Submitted by Roland Roberts on Thu 01 29 2009 16 48 As part of the International Year of Astronomy you can find a daily podcast on astronomy at http 365daysofastronomy org Read more about 365 Days of Astronomy Roland Roberts s blog Log in to post comments Milky Way Gets a Little Bigger Submitted by Roland Roberts on Tue 01 06 2009 16 17 There s a New York Times Science article from yesterday reporting on recent measurements indicating that the Milky Way our home galaxy is bigger than previously thought We now qualify as a peer of the Andromeda galaxy The critical measurement was how fast we revolve around the galactic center The faster we re going the more massive our galaxy must be to hold us in Read more about Milky Way Gets a Little Bigger Roland Roberts s blog Log in to post comments Pages first previous 4 5 6 7 8 9 10 11 12 next last Navigation Calendar Gallery Constellations Messier Objects M27 The Dumbell Nebula Resources Astronomy Books Buying A Star Buying A Telescope Clubs and Organizations General Interest Imaging and Astrophotography Magazines Mailing Lists and News Groups Science Toy Suppliers Software Weather Information Tips and Tricks Roland s Corner Recent content About Copyright Search form Search User login Username Password Request new password Science Daily Mercury Mercury gets a meteoroid shower from Comet Encke Mercury gets a meteoroid shower from Comet Encke More Science Daily Venus The aliens are silent because they re dead The aliens are silent because they re dead More Science Daily Mars Antarctic fungi survive Martian conditions on the International Space Station Antarctic fungi survive Martian conditions on the International Space Station Rotation speed may be bad news for Red Planet pioneers Rotation speed may be bad news for Red Planet pioneers The aliens are silent because they re dead More Science Daily

    Original URL path: http://www.astrofoto.org/blog?page=7 (2016-02-13)
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  • Blogs | astrofoto.org
    of the videos are fascinating like the one currently highlighted on their page which shows thermal convection Watching it is kind of like staring into the campfire it s mindless but somehow soothing If you ve got a Lava lamp the convection video will look quite familiar Read more about Geeky Physics Videos Roland Roberts s blog Log in to post comments No Child Left Inside Submitted by Roland Roberts on Tue 10 07 2008 12 33 October 12 18 is Earth Science Week PS 102 will be kicking off the Astronomy Club that week and unfortunately we don t have our first outdoor event planned until the following week on Oct 24 see Upcoming Events in the sidebar The week s activities focus on in school lesson plans with suitable opportunities to do the in class out of doors The American Geological Institudte is sponsoring the activities and have put together some material on the Earth Science Week web site for students and teachers Read more about No Child Left Inside Roland Roberts s blog Log in to post comments Mercury Flyby Submitted by Roland Roberts on Tue 10 07 2008 11 47 On Monday Oct 6 MESSENGER made it s second pass around Mercury The spacecraft doesn t have enough fuel to just pull up to the planet Star Trek style so it has to make a series of looping passes shedding a little velocity and angular momentum each time But it wasn t all navigational changes MESSENGER took the opportunity to take a few more pictures as it flew past Details are at the official web site Read more about Mercury Flyby Roland Roberts s blog Log in to post comments A Little Less Light NY Times Submitted by Roland Roberts on Tue 10 07 2008 11 42 There is a short opinion piece at the NY Times web site called A Little Less Light which makes good reading Read more about A Little Less Light NY Times Roland Roberts s blog Log in to post comments Pages first previous 5 6 7 8 9 10 11 12 13 next last Navigation Calendar Gallery Constellations Messier Objects M27 The Dumbell Nebula Resources Astronomy Books Buying A Star Buying A Telescope Clubs and Organizations General Interest Imaging and Astrophotography Magazines Mailing Lists and News Groups Science Toy Suppliers Software Weather Information Tips and Tricks Roland s Corner Recent content About Copyright Search form Search User login Username Password Request new password Science Daily Mercury Mercury gets a meteoroid shower from Comet Encke Mercury gets a meteoroid shower from Comet Encke More Science Daily Venus The aliens are silent because they re dead The aliens are silent because they re dead More Science Daily Mars Antarctic fungi survive Martian conditions on the International Space Station Antarctic fungi survive Martian conditions on the International Space Station Rotation speed may be bad news for Red Planet pioneers Rotation speed may be bad news for Red Planet pioneers The aliens are silent

    Original URL path: http://www.astrofoto.org/blog?page=8 (2016-02-13)
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  • Blogs | astrofoto.org
    talk actually began at 9 00am not 8 00 which was breakfast Read more about NEAIC Underway Roland Roberts s blog Log in to post comments PS 102 Stargazing Tonight Submitted by Roland Roberts on Sat 04 29 2006 11 09 I have the parks department permit in hand They verbally confirmed it was approved a week ago but the paperwork takes a while so it was only yesterday that it was finally ready Today I went over Prospect Park and picked it up As I was walking out I noticed it read no vehicles in the park at any time Oops Read more about PS 102 Stargazing Tonight Roland Roberts s blog Log in to post comments Response Coming Real Soon Now Submitted by Roland Roberts on Fri 04 28 2006 15 25 Okay that s not the actual words used and the front office person at the Mayor s Correspondence Unit was very polite and helpful In fact everyone I ve spoken to over there has been both courteous and professional and usually downright friendly It s the people I haven t been able to talk to that are the problem The correspondence unit is going to contact the people to whom the letter was sent and ask them to give me a call on Monday afternoon Okay Read more about Response Coming Real Soon Now Roland Roberts s blog Log in to post comments Trying to get the Mayor s attention Submitted by Roland Roberts on Thu 04 27 2006 20 29 For the past almost two months I ve been trying to get a response from the Mayor s office regarding the New York bill A7404 S4474 The Healthy Safe and Energy Efficient Outdoor Lighting Act It s seeming like a lost cause Read more about Trying to get the Mayor s attention Roland Roberts s blog Log in to post comments PS102 Stargazing Postponed Submitted by Roland Roberts on Tue 04 25 2006 21 58 The original plan was to meet in Shore Road Park near the ball fields across from the 77th Street entrance around 7 30pm But the weather wasn t cooperative in spite of it looking wonderful nearly all day The forecast was for it to turn cloudy and rainy around 7pm and the clouds rolled in pretty close to on schedule Rain date is this Saturday same time and place Read more about PS102 Stargazing Postponed Roland Roberts s blog Log in to post comments Pages first previous 7 8 9 10 11 12 13 14 15 Navigation Calendar Gallery Constellations Messier Objects M27 The Dumbell Nebula Resources Astronomy Books Buying A Star Buying A Telescope Clubs and Organizations General Interest Imaging and Astrophotography Magazines Mailing Lists and News Groups Science Toy Suppliers Software Weather Information Tips and Tricks Roland s Corner Recent content About Copyright Search form Search User login Username Password Request new password Science Daily Mercury Mercury gets a meteoroid shower from Comet Encke Mercury gets a meteoroid

    Original URL path: http://www.astrofoto.org/blog?page=14 (2016-02-13)
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  • Blogs | astrofoto.org
    thought they seller did provide a 32 bit install disk Read more about Testing Astro Video Capture in Linux Roland Roberts s blog Log in to post comments Teach Foundational Language Principles CACM May 2015 pp 30 31 Submitted by Roland Roberts on Thu 06 04 2015 13 25 The authors point to teaching programming languages as opposed to logic as being a seriously weak spot in computer science education While the Hour of Code has a lot of appeal and can introduce people to computing they point out that new computing languages are continuously being developed to try to solve new problems They make numerous examples and point to Dijkstra s classic Go To Statement Considered Harmful as examples of how understanding a problem has lead to new languages and new language structures Read more about Teach Foundational Language Principles CACM May 2015 pp 30 31 Roland Roberts s blog Log in to post comments Education What Are We Doing When We Teach Computing in Schools CACM May 2015 pp24 26 Submitted by Roland Roberts on Thu 06 04 2015 13 21 This article initally caught my attention with it s graphic and caption SCIENCE Gravity makes haveier things fall faster The author goes on to recount her experience with just such a poster in a local elementary science fair and her lack of success in having it taken down The point we have started pushing instruction of computing and programming into schools where there are non specialist teachers who are expected to understand the material well enough that the students come away with correct knowledge Read more about Education What Are We Doing When We Teach Computing in Schools CACM May 2015 pp24 26 Roland Roberts s blog Log in to post comments Really installing Oracle Java on Fedora Submitted by Roland Roberts on Tue 05 26 2015 20 16 This has nothing to do with astronomy at all but I can t find a good place to save this information So If you re trying to install Oracle s Java on Fedora after you ve done so the following will set up all of the alternatives links you want need Read more about Really installing Oracle Java on Fedora Roland Roberts s blog Log in to post comments Pages 1 2 3 4 5 6 7 8 9 next last Navigation Calendar Gallery Constellations Messier Objects M27 The Dumbell Nebula Resources Astronomy Books Buying A Star Buying A Telescope Clubs and Organizations General Interest Imaging and Astrophotography Magazines Mailing Lists and News Groups Science Toy Suppliers Software Weather Information Tips and Tricks Roland s Corner Recent content About Copyright Search form Search User login Username Password Request new password Science Daily Mercury Mercury gets a meteoroid shower from Comet Encke Mercury gets a meteoroid shower from Comet Encke More Science Daily Venus The aliens are silent because they re dead The aliens are silent because they re dead More Science Daily Mars Antarctic fungi survive Martian conditions

    Original URL path: http://www.astrofoto.org/blog?destination=blog (2016-02-13)
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  • Bright Skies
    Manhattan plus it s lower in the sky To make it short I could make out all four of the stars forming the trapezoid as well as epsilon Lyrae The faintest stars there are at magnitude 4 3 which is where I put the limiting magnitude Last week I did the same thing but could only see the three two brightest stars in the trapezoid According to the Clear Sky

    Original URL path: http://www.astrofoto.org/print/1438?destination=node/1438 (2016-02-13)
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  • Teach Foundational Language Principles (CACM May 2015, pp 30-31)
    people to computing they point out that new computing languages are continuously being developed to try to solve new problems They make numerous examples and point to Dijkstra s classic Go To Statement Considered Harmful as examples of how understanding a problem has lead to new languages and new language structures The driving force is increased complexity of the problems computing is trying to solve New languages and new language features continue to evolve to deal with these problems What lies beneath these is formal logic and formal problem specification something that is rarely discussed certainly not in introductory classes I m not sure how to get around that Some of the problems are only apparent after you ve learned a bit of programming or more to the point after you ve walked down the road of trying to do real computational and algorithmic thinking At least in early instruction it may be better to teach a little in a simplified environment first I m also trying to understand if how I can compare this to what we do in physics where we always abstract problems into simpler environments we can solve then add more sophisticated details and expose limits

    Original URL path: http://www.astrofoto.org/print/1252 (2016-02-13)
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