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Imagens — Por Adminstrador em junho 14, 2010 as 16:08
Tags: Araçatuba, astronomia, Festa Cósmica, Gener Silva, Inape, telescópio
Tags: Araçatuba, astronomia, Festa Cósmica, Gener Silva, Inape, telescópio
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Efemérides
julho 25, 2010 21:07 -
De olho no céu
agosto 26, 2010 22:08 -
Conhecendo o Sistema Solar: Marte
agosto 22, 2010 19:08 -
Zona não tão morta
agosto 22, 2010 19:08 -
Dados muito comprimidos
agosto 22, 2010 19:08 -
Conhecendo o Sistema Solar: Terra
agosto 10, 2010 22:08
NASA - Imagem do Dia
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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