gramática

O nascimento do cê-cedilha

6 de fevereiro de 2009
By LonelySpooky
O nascimento do cê-cedilha

O cê-cedilha originou-se no espanhol e o Dicionário de Oxford registra pela primeira vez o seu uso em 1599, num dicionário de espanhol-inglês. A função do cê-cedilha era representar um vocábulo semelhante a um /ts/, tanto que na edição original de Dom Quixote (1605), de Miguel de Cervantes, o nome do escudeiro é escrito...
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Posted in curiosidade, gramática | 4 Comments »

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NASA

A Chameleon Sky

 
The sands of time are running out for the central star of this the Hourglass Nebula. With its nuclear fuel exhausted, this brief, spectacular, closing phase of a sun-like star's life occurs as its outer layers are ejected and its core becomes a cooling, fading white dwarf. In 1995, astronomers used the Hubble Space Telescope to make a series of images of planetary nebulae, including the one above. Here, delicate rings of colorful glowing gas (nitrogen-red, hydrogen-green, and oxygen-blue) outline the tenuous walls of the 'hourglass.' The unprecedented sharpness of Hubble's images revealed surprising details of the nebula ejection process and may resolve the outstanding mystery of the variety of complex shapes and symmetries of planetary nebulae. Image Credit: NASA, WFPC2, HST, R. Sahai and J. Trauger (JPL)
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