Is Time Travel Possible, According To Science?

The Great Comet of 1881  -   Étienne Léopold Trouvelot  1881

French 1827-1895

Vintage illustration, Comet over observatory in night time sky

My Radio-inActive Life

I am a non-practicing amateur radio operator. K4EYO is my callsign. I have a General Class license, but I got that after the FCC did away with the Morse code requirement, so to some people that doesn’t really count.

There is still the Extra class license out there, my one last goal, the pinnacle, the zenith of the U.S. Amateur radio licensing system. I’m putting that off, because once I pass that test, well, what’s left? I already have the Holy Grail of licenses, which is the General Radiotelephone Operator’s License (GROL). But that’s for working on radio equipment on ships in the Great Lakes and in the oceans, and also for supervising avionics techs, or something like that. In other words, very non-amateur. It’s a lifetime license, so I don’t have to deal with renewing it, which is the coolest thing about it, to me.

Ancient History

When I was a kid, way back in the 60’s my best friend’s dad was a Ham (that’s what we call ourselves in Amateur Radio-Land) and he tried to teach a bunch of us kids Morse code via LPs. We sat in the basement and wrote down what we heard, or what we thought we heard. I hated it. But he had a great ham shack (equipment room) with lots of postcards (QSL cards) from his radio contacts all over the world. Cool. He also took us to the local radio club meetings in nearby Hazel Park, MI. All I remember from that was all of the cigar smoke and the swap meet equipment - old Hallicrafters and Heathkits. These were the computer geeks before there were computers.

And that was it for my radio experience. We moved to Atlanta and my attention was refocused on not being beat up by the various gangs at my new high school and pretending to like Elvis.

Not So Ancient History

Years later (1990-ish) I wound up going to a technical school in the mountains of North Georgia, which is a story for another day. But there I could pick from auto mechanics, brick-laying (yep!), practical nursing, electrical wiring, and electronic technology. They used to have watchmaking(!), which is what I would have taken, but instead I settled for the electronics program.

We had a couple of old guys who taught us all about analog circuits, tubes (we had a room full of tubes - must be worth a fortune now), and antennas. I loved this stuff.

We also had a younger guy who taught us about digital circuits, PLCs, assembly language, and who asked me at one point what the hell I was doing there, and not in a university somewhere.

I owe him a debt of gratitude for encouraging me.

It was here that I got my Technician class license and my GROL (first person in something like 15 years from the school). We re-established the dormant radio club at the school, which had three or four members. We’d go to hamfests (conventions for radio geeks), and talk to each other on 2 meter radios in our respective cars.  We strung antennas up on the roof of the classroom. We also tried to communicate with MIR as it made its passes overhead, along with the other thousands along the east coast. Remember MIR? From Wikipedia, ca 1993:

One guy had an HF setup at home. I just had a mobile 2m radio in my VW Bug, and a 2m handheld radio that stayed on my hip, as I played geek wannabe.

A Slight Divergence- typewriters

We moved back to Atlanta and my new skills got me a job repairing typewriters (actually, the auto mechanic track would have been more useful). This was a very cool job, but the pay was terrible. But I learned how to repair/adjust IBM Selectrics via sets of slides in Carousel trays, and older mechanical machines like Smith Coronas, Remingtons, Olivettis just by figuring them out. I keep thinking this is what I’d do if I started my own business. But then I come to my senses.

White Collar Work

Then I got into call center work, first answering phones, then managing, then building them as a project manager. This was the period where I’ve earned the most money so far.

The problem with project management is that by definition, projects are temporary. And so are project manager jobs. At this time there was also a huge movement to move call centers to India, and I didn’t like the thought of that commute.

Blue Collar Work

After being unemployed for 7 months I went to a Georgia Department of Labor job fair in 2001, where the local transit authority (MARTA) had a recruiter looking for radio techs. I was the only one there who had radio licenses and education (the line for computer maintenance/IT jobs was a mile long). 2 months later I had a job and became underemployed.

So now I was in a real radio shop! I could talk about radios, bring in my equipment to adjust and tune…

Nope. Only one had a ham license, the old-timer. The rest of them couldn’t care less about radios. And to add injury to insult, we were not allowed to work on our own stuff, even off the clock.

But I did get great training on 800 mhz trunking systems. And it got me motivated to go to college to get a degree in Economics (“you won’t get rich studying economics, but at least you’ll know why”, as the old joke goes.)

Back to White Collars

It was a few months after graduation that I got a new job at MARTA, as a Maintenance Planner for the computer maintenance group. 7 years later and I’m still doing that. Still not getting rich.

Urban Radios

This is when I upgraded my license to “General” and started putting together a radio setup. But we live in a high-rise, so antennas are more of a challenge. And to keep from singeing the fur on the cats, I had to look at low power (QRP) systems. I have always preferred these anyway, just to be an iconoclast amongst the iconoclasts.

For decades the radio magazines touted home-built (or store bought) 1000 watt or more systems. Just blast that signal out there, power bills & other people’s TV reception be damned! Not really, RFI is bad.

QRP systems appeal to me just like bicycles and economics appeal to me: Efficient use of resources.

So I’ve built assembled a little 40 meter radio, and built assembled an iambic paddle and have built assembled a meter in an altoids can. Now I just need to revisit my old nemesis, Morse code.

See, these low powered, efficient systems are that way because they don’t transmit voice. No fat sidebands. But they only use 3 watts instead of 100 or 1,000.

So I need to string up some wire, or build some exotic coil loaded beast to transmit from the living room, which could double as a scratching post for the cats. And then we’ll be in business.

Now

And six years later nothing has changed, except for the thick layer of dust on my stuff. I really should wire it all up and at least listen to chatter out there.

But I also need to make a shirt, finish the kitchen cabinets, build a workbench…

Maria Mitchell - Scientist of the Day

Maria Mitchell, an American astronomer, was born Aug. 1, 1818, in Nantucket. Mitchell was the first professional woman astronomer in the United States and a role model for generations of aspiring women scientists. She was trained by her father, a school-teacher, and had the extreme good fortune to discover a comet in 1847. Not only was she the first to see the comet, she also had the mathematical skill to calculate its orbit. Her feat won her an international gold medal from the Danish government, the first such recognition for any American woman, and eventually, the professorship of astronomy at Vassar College, also the first such position for any woman. (It is probably of interest to some of this reading audience that, before she became famous, Mitchell spent 17 years as a librarian on Nantucket.) Mitchell was admitted to various male bastions, such as the American Academy of Arts and Sciences in Boston (the only woman so honored until the 20th century), but she decided early on that, instead of trying to show men that women could be good scientists, she would spend her life showing young women that they could be good scientists. She seems to have done a superb job at this task, becoming a legendary teacher at Vassar. Antonia Maury, a noted astronomer at Harvard, was one of her pupils. The lovely albumen print portrait of Maria above is at Harvard.

In 1863, Matthew Vassar, the founder of Vassar College, personally commissioned a telescope for Mitchell from Henry Fitz, a well-known New York telescope builder. With a lense 12 inches in diameter, it was second among American telescopes only to the great refractor at Harvard (see second image above). The telescope is now in the National Museum of American History in Washington. Vassar also built an observatory for Maria; a period photo can be seen above, just below the Fitz refractor.

The small telescope that Mitchell used to discover the Nantucket comet is now mounted in her childhood home on Vestal Street (see last photo above), across from the headquarters of the Maria Mitchell Association, the group her descendants founded in 1908 to continue Mitchell’s lifelong passion for the natural sciences and science education.

Dr. William B. Ashworth, Jr., Consultant for the History of Science, Linda Hall Library and Associate Professor, Department of History, University of Missouri-Kansas City

The Great Comet of 1881  -   Étienne Léopold Trouvelot  1881

French 1827-1895

Vintage illustration, Comet over observatory in night time sky

Night lights change in the Middle East between 2012 and 2016

via @nasa

This morning, an Atlas V rocket launched from Cape Canaveral, Florida, carrying a US Navy communications satellite into space. 

It was another smooth take off for the United Launch Alliance, the company that manufactures the Atlas V. It was a particularly beautiful launch as well; the rocket left a spectacular multi-colored trail in its wake as it ascended into space

tfw your inactive blog gets a whole bunch of notes out of nowhere and you wonder if you could ever bring it back to life

Image of Saturn taken by Cassini spacecraft in October 28, 2016.

Credit: NASA / JPL / Cassini

Thirty years ago today, at 11:38 a.m. EST, January 28, 1986, the space shuttle Challenger lifts off from Cape Canaveral, Florida. Christa McAuliffe, teacher from New Hampshire, was to be the first ordinary U.S. civilian to travel into space. Challenger‘s launch countdown was repeatedly delayed because of weather and technical problems. Finally, on January 28, the shuttle lifted off.

73 seconds later, hundreds on the ground, including Christa’s family, stared in disbelief as the shuttle exploded in a forking plume of smoke and fire, killing all seven crew members. Millions more watched the heart-wrenching tragedy unfold on live television.

“The future doesn’t belong to the faint-hearted. It belongs to the brave.” President Reagan said. “The Challenger crew was pulling us into the future, and we’ll continue to follow. Nothing ends here; our hopes and our journeys continue.”