Astronomy picture of the day - 2015 December 4 - Cygnus: Bubble and Crescent

Cygnus: Bubble and Crescent 
Image Credit & Copyright: Ivan Eder

Explanation: These clouds of gas and dust drift through rich star fields along the plane of our Milky Way Galaxy toward the high flying constellation Cygnus. Caught within the telescopic field of view are the Soap Bubble (lower left) and the Crescent Nebula (upper right). Both were formed at a final phase in the life of a star. Also known as NGC 6888, the Crescent was shaped as its bright, central massive Wolf-Rayet star, WR 136, shed its outer envelope in a strong stellar wind. Burning through fuel at a prodigious rate, WR 136 is near the end of a short life that should finish in a spectacular supernova explosion. recently discovered Soap Bubble Nebula is likely a planetary nebula, the final shroud of a lower mass, long-lived, sun-like star destined to become a slowly cooling white dwarf. While both are some 5,000 light-years or so distant, the larger Crescent Nebula is around 25 light-years across.

Alejandro Sanz & Ivete Sangalo - "Não me compares" - Video - Musica

"Não me compares"

Lisboa/Sete Colinas - Video - Diapo

Lisboa/Sete colinas

Ana Carolina - "Quem de nos dois" - Video - Musica - Ao vivo

"Quem de nos dois"

Astronomy picture of the day - 2015 December 3 - Enceladus: Ringside Water World

Enceladus: Ringside Water World 
Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA

Explanation: Saturn's icy moon Enceladus poses above the gas giant's icy rings in this Cassini spacecraft image. The dramatic scene was captured on July 29, while Cassini cruised just below the ring plane, its cameras looking back in a nearly sunward direction about 1 million kilometers from the moon's bright crescent. At 500 kilometers in diameter, Enceladus is a surprisingly active moon though, its remarkable south polar geysers are visible venting beyond a dark southern limb. In fact, data collected during Cassini's flybys and years of images have recently revealed the presence of a global ocean of liquid water beneath this moon's icy crust. Demonstrating the tantalizing liquid layer's global extent, the careful analysis indicates surface and core are not rigidly connected, with Enceladus rocking slightly back and forth in its orbit.

Imagens do mundo - Nova Delhi - India

Dos jovenes buscan basura para reciclar en las aguas del río Yamuna, en Nueva Delhi (India).

ANINDITO MUKHERJEE (REUTERS)

Tom Jobim - "Insensatez" - Video - Musica - Ao vivo

"Insensatez"

Independência Nacional - 1640 - Video - Musica

INDEPENDÊNCIA

A Restauração do Primeiro de Dezembro de 1640 - Independência - Video - Musica

"Hino da Restauração - 1 de dezembro de 1640. Os descendentes têm-no sempre na memoria. Por isso somos PORTUGAL!

Astronomy picture of the day - 2015 December 2 - Golden Gate Sunset: Green Flash

2015 December 2
Golden Gate Sunset: Green Flash 
Video Credit & Copyright: Alex Rivest; Music: Eureka by Huma-Huma

Explanation: The setting is San Francisco Bay, the time is sunset, and the bridge is the Golden Gate. What you are about to see is an unexpected double sunset ending with a rare green flash. Watch closely -- in the recorded time-lapse sequence, unusually warm air created by bridge traffic refracts sunlight toward the Earth, causing a superior image of the top of the Sun to form. This image will disappear -- marking the first "sunset" -- only after the main image has dipped below the deck. All the while, boats pass in the foreground, cars pass over the bridge, and clouds reflecting sunlight drift by in the distance. The scene ends with Earth's turbulent atmosphere itself creating a path that onlyhigher-energy visible sunlight can traverse, making the last glimpse of our home star appear to flash green.