Saturn,cassini

Nasa astronomers discover new solar system of seven planets called TRAPPIST-1 where life may have evolved on three of them

Life may have evolved on at least three planets in a newly discovered solar system just 39 light years from Earth, Nasa has announced.​

Astronomers have detected no less than seven Earth-sized worlds orbiting a cool dwarf star known as TRAPPIST-1.

TRAPPIST-1 is an ultracool dwarf star that is approximately 8 per cent the mass of and 11 per cent the radius of our  Sun.

It has a temperature of 2550K and is at least 500 million years old. In comparison, the Sun is about 4.6 billion years old and has a temperature of 5778K.

The six inner planets lie in a temperate zone where surface temperatures range from zero to 100C.

Of these, at least three are thought to be capable of having oceans, increasing the likelihood of life.

No other star system known contains such a large number of Earth-sized and probably rocky planets.

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Lots of stuff like this at www.astrotidbits.com with explanations.

ham radio.

NASA‘s Juno: spacecraft has successfully entered orbit around the gas giant Jupiter. 

After five years and 1.7 billion miles the probe accomplish a risky braking manoeuvre in order for it to be hooked by Jupiter’s gravity. NASA’s Jet Propulsion Laboratory, California received the confirmation signal which confirmed Juno had finally entered orbit on July 4. Juno will begin a two-year mission of discovery which will help scientists better understand one of the largest objects in our solar system.

Using Juno’s complex array of cameras and sensors the team hope to answer some long-awaited questions including whether Jupiter actually has a solid core or if it really is just a swirling ball of gas. Another focus will be the Great Red Spot - a massive storm several times the size of Earth that has been raging on the surface of Jupiter for what appears to be hundreds of years. Juno is the fastest spacecraft to ever enter orbit around a planet, travelling at an astonishing 130,000mph by the time it reached the gas giant.

Blackmagic URSA 4K Digital Cinema Camera

And now that one special, prestigious piece of gear has finally arrived to round off the years of camera development and take you to the vertiginous peaks of unbelievable footage quality and extreme equipment versatility: the recently released Blackmagic URSA 4K Digital Cinema Camera is the ultimate camera for professional film crews and keen solo cameramen looking to revolutionize their filming sessions.

Enceladus - Life in our solar system?

Enceladus is Saturns icy moon that measures approximately 504km in diameter, about a tenth of the size of Saturn’s largest moon Titan. Almost completely covered in ice, this moon could potentially harbour the same type of life-sustaining chemical reactions found in deep sea hydrothermal vents here on Earth.

In 2005, NASA’s Saturn orbiting Cassini spacecraft spotted geysers of water and ice erupting fro fissures near Enceladus’ South Pole. Scientists believe they originate from a great ocean beneath the shell of ice. This ocean manages to stay liquid because the gravitational force exerted by Saturn is so intense that it twists and stretches the moon generating internal heat.

In October 2015, Cassini went on a dive through one of the plumes passing within just 39km of Enceladus’ surface. A team of scientists led by Hunter Waite analysed the observations made by the spacecraft. They discovered that the geysers contain between 0.4%-1.4% molecular hydrogen (H2) and 0.3%-0.8% carbon dioxide (CO2). These are being produced continuously by reactions between hot water and rock near the core of the moon. Some of the most primitive metabolic pathways found in microbes at deep ocean hydrothermal vents involve the reduction of CO2 with H2 to form methane (CH4) by a process known as methanogenesis.

Just some eye candy from the Hubble Space Telescope.  One of the great scientific achievements of our time.

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…

Polaroid Cube

Unconventional design is not the only advantage of the Cube. It is packed with functionality. It is shockproof and water resistant, very rugged and durable, but it also provides you with 1080p HD video, 6MP photo quality with 124° wide angle lens.

http://player.vimeo.com/video/62255585

Comet Panstarrs captured in gorgeous time-lapse above the skies of Boulder, CO by Patrick Cullis. Lovely stuff.

Comets are mysterious frozen chunks of stellar and planetary debris, these dirty snowballs that wander in darkness until their tails are blown bright and wide by solar winds. Some follow paths so random and eccentric that they may pass a star only once, or perhaps not at all, instead floating through interstellar space, never to be known. But for those fleeting moments, like Panstarrs’ current passage, they are like icy candles lit for our enjoyment by the breath of the sun.

A song of ice and fire, indeed.