SpaceX have released a free Crew Dragon docking simulator which runs within your browser. Simply click the link, read the instructions, and try your hand at it. It’s also fun just to fly around the 3D model of the International Space Station. The simulator is a clone of the user interface used in the actual spacecraft, and the physics of the thrusters and spacecraft are simulated. If you’d like some tips to get started and an example of docking, here is a Scott Manley video showing how it’s done.
Two historians who are friends started the History Hack podcast to give people something to listen to during the lockdown. Here’s a review of it. https://www.warhistoryonline.com/news/history-hack.html. My podcast is https://historyhack.podbean.com/e/66-history-hack-oral-history/ It’s also on iTunes.
Looking for a good read? Here is a recommendation. I have an unusual approach to reviewing books. I review books I feel merit a review. Each review is an opportunity to recommend a book. If I do not think a book is worth reading, I find another book to review. You do not have to agree with everything every author has written (I do not), but the fiction I review is entertaining (and often thought-provoking) and the non-fiction contain ideas worth reading.... [Read More]
The windstorms HAD TO COME after I took the net off my pond. It did clear up a lot though, and now, unfortunately, I see the devastation. It’s full of
stars, er leaves.
But it’s crystal clear and deceptive of depth. The leaves, just about in the middle of the picture, are about two feet down. That’s the deepest part, around 32 inches, (81.28 Centimeters), deep. I did attempt to use a narrow leaf rake to get some leaves out, but the pond will have to wait until I can put a ladder across it and a plank atop the ladder. Then I have to lay on the plank and reach way down to grab handfuls of leaves.... [Read More]
Something rather informational, only a half hour, guess Nancy didn’t get to add money for their version of PBS…
Yesterday I learned a new thing about sex: the ZW sex determination system. Everyone knows about the XY system: the girls have XX and the boys have XY chromosomes. In college we used James D. Watson’s Molecular Biology of the Gene (2nd ed.). The book is currently in its 7th edition. Early in the text, there’s a section entitled “Chromosomal Determination of Sex” from which I’ve reproduced (pun intended) the page below. Species as disparate as humans, fruit flies (Drosophila), and some plants use the XY system. I figured that’s all there was to it, aside from plants, since that’s all Mr. Watson had to say on the subject. If you already know all about the ZW system, accept my apologies, feel free to congratulate yourself on your erudition, and move on to a different post.
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General relativity (GR) denies quantum mechanics (QM) that is real world perfectly predictive, as is GR. 60 years of theoretical physics cannot find gravitation within QM. Can GR and/or QM be observed to fail within its own rules? To criticize is to volunteer.
Place identical left shoes inside Shrödinger’s box. Discrete reality becomes a QM wavefunction, sums of all solutions. Open the box and look. The indeterminate wavefunction collapses into discrete reality, pairs of left and right shoes.... [Read More]
The film Planet of the Humans, directed by Jeff Gibbs and backed and promoted by Michael Moore, has been released for free on YouTube. Those plugged into The Happening World by joining the SCANALYZER group learned of this hours ago, but here’s an announcement for a wider audience.
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Computers are funny, no not funny in the sense as a joke, but funny as in strange.
For some reason my internal network card or circuit, decided that I was doing too much online so it slowed down to 10 Meg. It’s a Broadcom Netlink Gigabyte Ethernet circuit! It’s supposed to handle all I can throw at it !... [Read More]
Hubble explores the universe 24 hours a day, 7 days a week. That means it has observed some fascinating cosmic wonder every day of the year, including on your birthday.
What did Hubble look at on your birthday? Enter the month and date on this page to find out!