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Posts Tagged ‘Tycho Brahe

“I’m sure the universe is full of intelligent life. It’s just been too intelligent to come here.”*…

 

couldoumuamu

Artist’s impression of the first interstellar asteroid/comet, “Oumuamua”

 

Or not…

On October 19th, 2017, the Panoramic Survey Telescope and Rapid Response System-1 (Pan-STARRS-1) in Hawaii announced the first-ever detection of an interstellar asteroid, named 1I/2017 U1 (aka, ‘Oumuamua). In the months that followed, multiple follow-up observations were conducted that allowed astronomers to get a better idea of its size and shape, while also revealing that it had the characteristics of both a comet and an asteroid.

Interestingly enough, there has also been some speculation that based on its shape, ‘Oumuamua might actually be an interstellar spacecraft (Breakthrough Listen even monitored it for signs of radio signals!). A new study by a pair of astronomers from the Harvard Smithsonian Center for Astrophysics (CfA) has taken it a step further, suggesting that ‘Oumuamua may actually be a light sail of extra-terrestrial origin…

As for what an extra-terrestrial light sail would be doing in our solar system, [Harvard astronomers Shmuel Bialy and Prof. Abraham Loeb] offer some possible explanations for that. First, they suggest that the probe may actually be a defunct sail floating under the influence of gravity and stellar radiation, similar to debris from ship wrecks floating in the ocean. This would help explain why Breakthrough Listen found no evidence of radio transmissions.

Loeb further illustrated this idea in a recent article he penned for Scientific American, where he suggested that ‘Oumuamua could be the first known case of an artificial relic which floated into our solar system from . What’s more, he notes that lightsails with similar dimensions have been designed and constructed by humans, including the Japanese-designed IKAROS project and the Starshot Initiative with which he is involved.

“This opportunity establishes a potential foundation for a new frontier of space archaeology, namely the study of relics from past civilizations in space,” Loeb wrote. “Finding evidence for space junk of artificial origin would provide an affirmative answer to the age-old question “Are we alone?”. This would have a dramatic impact on our culture and add a new cosmic perspective to the significance of human activity.”

On the other hand, as Loeb told Universe Today, ‘Oumuamua could be an active piece of alien technology that came to explore our solar system, the same way we hope to explore Alpha Centauri using Starshot and similar technologies”…

More provocative detail at “Could ‘Oumuamua be an extraterrestrial solar sail?

* Arthur C. Clarke

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As we ask if we’re alone, we might recall that it was on this date in 1572 that Wolfgang Schüler first noted a supernova in the W-shaped constellation of Cassiopeia.  It was subsequently seen by other observers, including Tycho Brahe, who included an account of the sighting in his De nova stellaConsequently, the supernova– one of eight visible to the naked eye in historical records– is known as “Tycho’s Supernova.”

Tycho_Cas_SN1572

Star map of the constellation Cassiopeia showing the position (labelled I) of the supernova of 1572; from Tycho Brahe’s De nova stella

source

 

 

Written by LW

November 6, 2018 at 2:01 am

The pursuit of the hirsute…

From the doers…

…to the done…

… it’s all at The Hair Hall of Fame.

As we let it all go to our heads, we might wish a mystically happy birthday to mathematician, astronomer, astrologer, alchemist/occultist, navigator, and champion of English expansionism John Dee; he was born on this date in 1527.  Widely regarded as the smartest man and/or most powerful magician in the Europe of his time, Dee was an intimate advisor to Queen Elizabeth I and her closest ministers.  But Dee, a student of Copernicus and a friend of Tycho Brahe, was also a serious scholar (his library was the largest in England, perhaps in Europe) and  one of the most learned men of his day– a central figure in the development of modern science… and underneath that cap, he had a killer head of hair.

source

 

The Annals of Enthusiasm, Volume 1000cc…

A hospital technician by day, on his own time Francois Knorreck is a mad motorcyclist, with numerous notches on his fan belt (e.g., first to cross the Loire on an amphibious motorbike of his own adaptation).

His most recent project is the Snaefell (named for an Icelandic volcano). “After 10,000 hours of hard work, more than 10 years from time to time in the garage, and about 15000 Euros spent, the Snaefell was ready to ride!”

And what a ride:

See more here.

As we reconsider our Vespas, we might spare a memorial thought for Tycho Brahe, the Danish nobleman, astrologer, alchemist, and greatest-ever naked-eye astronomical observer.  Brahe, who died on this date in 1601, made the observations from which his assistant, Johannes Kepler, derived his Laws of Planetary Motion.

Tycho Brahe

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Written by LW

October 24, 2009 at 12:01 am

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