https://www.facebook.com/groups/172438633343696 Can someone tell me the current best all sky set up? I was thinking of one that had zoom from all sky to 30x. Any suggestions. Thanks. I was looking at PTZ low light security cameras. Dan Bush Thank you. Your picture gallery is filled with beautiful images. I searched fro Hikvision cameras and
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Debbie, First, your novice videos should be globally public on your website. Either HAS is an organization devoted to all people knowing about the sky and heavens, or not. Share openly. If there are things specific to secure gatherings at private places, those should not be shared, but minimized or separate. I tell groups like
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http://Article Nuclear Desalination: A State-of-the-Art Review Thank you for putting this together. This is a clear, and fairly complete, review of the issues, economics, performance and maintenance of nuclear desalination processors. I just wish that each site’s operational, financial and social impacts were public on the Internet in a form for comparison and optimization. Encouraging
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SpaceX Starship can return from Mars without surface refilling at https://www.youtube.com/watch?v=u55zpE4r-_Y The engineering design and manufacturing costs for atomic power are a lot less than the cost of hauling chemical or solar panels to Mars. Do the numbers and see what it is worth to spend on lightweight atomic power units and technologies. A few ten
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Earthquake seismograph using bismuth magnetic levitator as sensor at https://www.youtube.com/watch?v=aIANNzpec7Y Tomislav Stimac, The “standard” still for accelerometers is the small but global network of super conducting gravimeters (SGs). They use liquid helium cooled niobium magnetically levitated spheres as the test mass. The sensitivity is about 0.1 nanometers per second squared (nm/s2) at 1 sample per second.
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Hubble vs. Amateur Astrophotographer (27 Aug 2021) at https://www.youtube.com/watch?v=0QcJaD9klDc I had to look a bit, but eventually found a description of the camera and exposure for that original image of “Pillars of Creation” at https://hubblesite.org/mission-and-telescope/mission-timeline#h4-deab74a9-f038-4a74-9313-425d13e71747 with more detail at https://hubblesite.org/contents/news-releases/1995/news-1995-44.html then some images at https://hubblesite.org/contents/media/images/1995/44/351-Image.html?news=true Like usual, Hubble media people dominate sharing on their site,
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What YOU Can SEE Through a $1 Billion, $32,000 and an $800 Telescope! https://www.youtube.com/watch?v=VwoII9TQd8k There are many countries with LOTS of people where $800 is more than the median annual income. And many more countries and many more people where $800 is more than monthly income. So here you are, posting a video that could
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I have had deserts on my mind a lot over the last few decades. All during the 1980’s I worked on populations forecasts and issues in Africa, then the Famine Early Warning Systems (FEWS.net), then global climate change. I sort of keep up with any efforts to turn those vast areas into something more suitable
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Ion Engine 2.0 at https://www.youtube.com/watch?v=OSt1-JsDyGs (“electric wind” OR “ionic wind”) has 574,000 entry points (Google, 9 Oct 2021) (“electric wind” OR “ionic wind”) site:arxiv.org has 310 entry points (“electric wind” OR “ionic wind”) site:youtube.com has 141,000 entry points And they are not all working together globally. Richard Collins, Director, The Internet Foundation
Floating under a levitating liquid at https://www.youtube.com/watch?v=bodsuTucSxQ and https://www.nature.com/articles/s41586-020-2643-8 (for pay, just for reference) This is not science and sharing, but what I have come to call “eye candy”. Pretty pictures and people playing with phenomena, but not showing the context and background. You start with showing the whole of the apparatus, explain the parts,
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