[Rogelio] isn’t new to the astrophotography game, possessing a capable twin-telescope rig with star tracking capabilities and chilled CCDs for reducing noise in low-light conditions. Identifying the location of the Tesla Roadster was made easier thanks to NASA JPL tracking the object and providing ephemeris data.
Imaging the Roadster took some commitment – from [Rogelio]’s chosen shooting location, it would only be visible between 3AM and 5:30AM. Initial attempts were unsuccessful, but after staying up all night, giving up wasn’t an option. A return visit days later was similarly hopeless, and scuppered by cloud cover.
It was only after significant analysis that the problem became clear – when calculating the ephemeris of the object on NASA’s website, [Rogelio] had used the standard coordinates instead of the actual imaging location. This created enough error and meant they were looking at the wrong spot. Thanks to the wide field of view of the telescopes, however, after further analysis – Starman was captured, not just in still, but in video!
It seems like [Jason Bowling] never gets tired of finding new ways to combine the Raspberry Pi with his love of the cosmos. This time he’s come up with a very straightforward way of focusing his Celestron 127SLT with everyone’s favorite Linux SBC. He found the focus mechanism on the scope to be a bit fiddly, and operating it by hand was becoming a chore. With the Pi Zero and a stepper motor, he’s now able to focus the telescope with more accuracy and repeatability than clumsy human fingers will be able to replicate.
On this particular type of telescope, the focus knob is a small knob on the back of the scope (rather than on the eyepiece), which just so happens to be the perfect size to slide a 15mm bore pulley over. With a pulley on the focus knob, he just needed to mount a stepper motor with matching toothed pulley next to it and find a small enough belt to link them together. Through the magic of Amazon and McMaster-Carr he was able to find all the parts without having to make anything himself, beyond the bent piece of aluminum he’s using as a stepper mount.
To control the stepper, [Jason] is using an EasyDriver connected up to the Pi’s GPIO, which along with a 5V regulator (which appears to be a UBEC from the RC world) is held in a tidy weather proof box mounted to the telescope’s tripod. The regulator is necessary because the whole setup is powered by a 12V portable “jump start” battery pack for portability. Handy when you’re stargazing in the middle of a field somewhere.
[Jason] promises a future blog post where he details how he used Flask to create a web-based control for the hardware, which we’ll be keeping an eye out for. In the meantime, he reports that his automated focus system is working perfectly and keeps the image stable in the eyepiece even while moving (something he was never able to do by hand).
What must it be like to devote your life to answering a single simple but monumental question: Are we alone? Astronomer Jill Tarter would know better than most what it’s like, and knows that the answer will remain firmly stuck on “Yes” until she and others in the Search for Extraterrestrial Intelligence project (SETI) prove it otherwise. But the path she chose to get there was an unconventional as it was difficult, and holds lessons in the power of keeping you head down and plowing ahead, no matter what.
To get to the point where she could begin to answer the fundamental question of the uniqueness of life, Jill had to pass a gauntlet of obstacles that by now are familiar features of the biography of many women in science and engineering. Born in 1944, Jill Cornell grew up in that postwar period of hope and optimism in the USA where anything seemed possible as long as one stayed within established boundaries. Girls were expected to do girl things, and boys did boy things. Thus, Jill, an only child whose father did traditional boy things like hunting and fixing things with her, found it completely natural to sign up for shop class when she reached high school age. She was surprised and disappointed to be turned down and told to enroll in “Home Economics” class like the other girls.
She eventually made it to shop class, but faced similar obstacles when she wanted to take physics and calculus classes. Her guidance counselor couldn’t figure why a girl would need to take such classes, but Jill persisted and excelled enough to get accepted to Cornell, the university founded by her distant relation, Ezra Cornell. Jill applied for a scholarship available to Cornell family members; she was turned down because it was intended for male relatives only.
Undeterred, Jill applied for and won a scholarship from Procter & Gamble for engineering, and entered the engineering program as the only woman in a class of 300. Jill used her unique position to her advantage; knowing that she couldn’t blend into the crowd like her male colleagues, she made sure her professors always knew who she was. Even still, Jill faced problems. Cornell was very protective of their students in those days, or at least the women; they were locked in their dorms at 10:00 each night. This stifled her ability to work on projects with the male students and caused teamwork problems later in her career.
No Skill is Obsolete
Despite these obstacles, Jill, by then married to physics student Bruce Tarter, finished her degree. But engineering had begun to bore her, so she changed fields to astrophysics for her post-graduate work and moved across the country to Berkeley. The early 70s were hugely inspirational times for anyone with an eye to the heavens, with the successes of the US space program and leaps in the technology available for studies the universe. In this environment, Jill figured she’d be a natural for the astronaut corps, but was denied due to her recent divorce.
Disappointed, Jill was about to start a research job at NASA when X-ray astronomer Stu Boyer asked her to join a ragtag team assembled to search for signs of intelligent life in the universe. Lacking a budget, Boyer had scrounged an obsolete PDP-8 from Berkeley and knew that Jill was the only person who still knew how to program the machine. Jill’s natural tendency to fix and build things began to pay dividends, and she would work on nothing but SETI for the rest of her career.
From the Bureaucratic Ashes
SETI efforts have been generally poorly funded over the years. Early projects were looked at derisively by some scientists as science fiction nonsense, and bureaucrats holding the purse strings rarely passed up an opportunity to score points with constituents by ridiculing efforts to talk to “little green men.” Jill was in the thick of the battles for funding, and SETI managed to survive. In 1984, Jill was one of the founding members of the SETI Institute, a private corporation created to continue SETI research for NASA as economically as possible.
The SETI Institute kept searching the skies for the next decade, developing bigger and better technology to analyze data from thousands of frequencies at a time from radio telescopes around the world. But in 1993, the bureaucrats finally landed the fatal blow and removed SETI funding from NASA’s budget, saving taxpayers a paltry $10 million. Jill and the other scientists kept going, and within a year, the SETI Institute had raised millions in private funds, mostly from Silicon Valley entrepreneurs, to continue their work.
The Institute’s Project Phoenix, of which Jill was Director until 1999, kept searching for signs of life out there until 2004, with no results. They proposed an ambitious project to improve the odds — an array of 350 radio telescopes dedicated to SETI work. Dubbed the Allen Telescope Array after its primary patron, Microsoft co-founder Paul Allen, the array has sadly never been completed. But the first 42 of the 6-meter dishes have been built, and the ATA continues to run SETI experiments every day.
Jill Tarter retired as Director of SETI Research for the Institute in 2012, but remains active in the SETI field. Her primary focus now is fundraising, leveraging not only her years of contacts in the SETI community but also some of the star power she earned when it became known that she was the inspiration for the Ellie Arroway character in Carl Sagan’s novel Contact, played by Jodie Foster in the subsequent Hollywood film.
Without a reasonable SETI program, the answer to “Are we alone?” will probably never be known. But if it is answered, it’ll be thanks in no small part to Jill Tarter and her stubborn refusal to stay within the bounds that were set for her.
On an October night in 1847, a telescope on the roof of the Pacific National Bank building on Nantucket Island was trained onto the deep black sky. At the eyepiece was an accomplished amateur astronomer on the verge of a major discovery — a new comet, one not recorded in any almanac. The comet, which we today know by the dry designator C/1847 T1, is more popularly known as “Miss Mitchell’s Comet,” named after its discoverer, a 29-year old woman named Maria Mitchell. The discovery of the comet would, after a fashion, secure her reputation as a scholar and a scientist, but it was hardly her first success, and it wouldn’t be her last by a long shot.
A few links posts ago, we wrote something about a company selling huge LED panels on eBay, ten panels for $50. Those panels are gone now, but a few lucky hackers got their hands on some cool hardware. Now there’s a project to reverse engineer these Barco NX-4 LED panels. Who’s going to be the first to figure out how to drive these things? Doesn’t matter — it’s a group project and we’re all made richer by the contributions of others.
A year and a half ago, a $79 3D printer popped up on Kickstarter. I said I would eat a hat if it shipped by next year. Seeing as how it’s basically November, and they’re not selling a $79 printer anymore — it’s $99 — this might go down as one of my rare defeats, with an asterisk, of course. I’m going to go source some very large fruit roll-ups and do this at Supercon. Thanks, [Larry].
Speaking of bets, this week Amazon introduced the most idiotic thing ever invented. It’s called Amazon Key. It’s an electronic lock (dumb), connected to the Internet (dumber), so you let strangers into your house to deliver packages (dumbest). CCC is in a few months, so I don’t know if Amazon Key will be hacked by then, but I’m pretty confident this will be broken by March.
The Lulzbot Taz is one of the best printers on the market, and it is exceptionally Open Source. The Taz is also a great printer for low-volume production. It was only a matter of time until someone built this. The Twoolhead is a parallel extruder for the Taz 6. Instead of one extruder and nozzle, it’s two, and instead of printing one object at a time, it prints two. Of course it limits the build volume of the printer, but if you need smaller parts faster, this is the way to go.
At CES this year, we caught wind of one of the coolest advances in backyard astronomy in decades. The eVscope is ‘astrophotography in the eyepiece’, and it’s basically a CCD, a ton of magic image processing, and a small display, all mounted inside a telescope. Point the scope at a nebula, and instead of seeing a blurry smudge, you’ll see tendrils and filaments of interstellar gas in almost real-time. Now the eVscope is on Kickstarter. It’s a 4.5 inch almost-Newtonian (the eyepiece is decoupled from the light path, so I don’t even know how telescope nomenclature works in this case), an OLED display, and a 10-hour battery life.
Audio tomphoolery even an idiot tech blogger can see through! I received a press kit for a USB DAC this week that included the line, “…low drop out voltage regulators running at 3.3 V, meaning the 5 V USB limit is well preserved.” Yes, because you’re running your system at 3.3 V, you won’t draw too much current from a USB port. That’s how it works, right?
[Peter Sripol] is building an ultralight in his basement. The last few weeks of his YouTube channel have been the must-watch videos of the season. He’s glassed the wings, installed all the hardware (correctly), and now he has the motors and props mounted. This is an electric ultralight, so he’s using a pair of ‘150 cc’ motors from HobbyKing. No, that’s not displacement, it’s just a replacement for a 150 cc gas engine. On a few YouTube Live streams, [Peter] did what was effectively a high-speed taxi test that got out of hand. It flew. Doing that at night was probably not the best idea, but we’re looking forward to the videos of the flight tests.
Location, location, location — what’s critical to real estate is also critical to eclipse watching, and without sounding too boastful, those of us atop South Menan Butte, an extinct volcano in southeast Idaho, absolutely nailed it. Not only did we have perfect weather, we had an excellent camping experience, great food, a magnificent natural setting, and a perch 800 feet above a vast plain stretching endlessly to the east and west. Everything was set up for a perfect eclipse experience, and we were not disappointed.
While most people who make the trek to the path of totality for the Great American Eclipse next week will fix their gazes skyward as the heavenly spectacle unfolds, we suspect many will attempt to post a duck-face selfie with the eclipsed sun in the background. But at least one man will be feverishly tending to an experiment.
On a lonely hilltop in Wyoming, Dr. Don Bruns will be attempting to replicate a famous experiment. If he succeeds, not only will he have pulled off something that’s only been done twice before, he’ll provide yet more evidence that Einstein was right.