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08 junho 2017
SIMPATIA PARA ALCANÇAR UMA GRAÇA
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M27 Not a Comet
While hunting for comets in the skies above 18th century France, astronomer Charles Messier diligently kept a list of the things he encountered that were definitely not comets. This is number 27 on his now famous not-a-comet list. In fact, 21st century astronomers would identify it as a planetary nebula, but it's not a planet either, even though it may appear round and planet-like in a small telescope. Messier 27 (M27) is an excellent example of a gaseous emission nebula created as a sun-like star runs out of nuclear fuel in its core. The nebula forms as the star's outer layers are expelled into space, with a visible glow generated by atoms excited by the dying star's intense but invisible ultraviolet light. Known by the popular name of the Dumbbell Nebula, the beautifully symmetric interstellar gas cloud is over 2.5 light-years across and about 1,200 light-years away in the constellation Vulpecula. This spectacular color image incorporates broad and narrowband observations recorded by the 8.2 meter Subaru telescope.
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When Were Dogs Domesticated
Watching a Volatile Stellar Relationship
In biology, “symbiosis” refers to two organisms that live close to and interact with one another. Astronomers have long studied a class of stars – called symbiotic stars – that co-exist in a similar way. Astronomers are gaining a better understanding of how volatile this close stellar relationship can be.
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As Welsh privateer Henry Morgan approached the San Lorenzo Fort...
As Welsh privateer Henry Morgan approached the San Lorenzo Fort at the mouth of Panama’s Chagres River in 1671, several of his ships wrecked against the Lajas Reef, including Morgan’s flagship Satisfaction. Morgan’s ships ran afoul of a shallow reef and rough waves, on the way to raid Panama City in response to a Spanish attack on English Jamaica. Recently six cannons from one of those shipwrecks were raised.
Well, we are pretty sure that’s what was raised. The wreck was a violent one, strewing iron cannon debris across the reef. That matches with the rough seas we know Morgan’s ships were dealing with. And the varied weaponry found also points to pirates. Pirates used whatever weapons they could purchase or capture, and therefore would have had mismatches, unlike the standardized armory in any royal navy ship.
VISIT –> http://ift.tt/2mRL6jh...
VISIT –> http://ift.tt/2mRL6jh to learn all about the life and work of psychology legend B.F. Skinner.
Tannit – or Tannou or Tangou or Tinnit – was the...
Tannit – or Tannou or Tangou or Tinnit – was the main maternal goddess of Carthage alongside her consort Ba`al Hammon. She was the goddess of war, of mothers, and to a lesser extent of fertility. She remained popular even after the fall of Carthage. She was first venerated in North Africa under the Latin name of Juno Caelestis, the romanized version of the goddess. Outside the sphere of Roman influence, the Berber peoples of North Africa adopted her cult under her original Carthaginian name. In modern-day Tunisian Arabic, it is still customary to invoke “Omek Tannou” or “Oumouk Tangou” (Mother Tannou or Tangou depending on the region), in years of drought to bring rain.