Mostrar mensagens com a etiqueta Espaço. Mostrar todas as mensagens
Mostrar mensagens com a etiqueta Espaço. Mostrar todas as mensagens

sexta-feira, 31 de agosto de 2012

A evolução da lua ao longo de 4,5 mil milhões de anos



As imagens, que dão conta de como a lua mudou para parecer o que é hoje, foram divulgadas no âmbito da celebração do milésimo dia do Lunar Reconnaissance Orbiter (LRO, Orbitador de Reconhecimento Lunar) da NASA.

terça-feira, 27 de dezembro de 2011

"Image of the day" - 26/12/2011

The city lights of Spain and Portugal define the Iberian Peninsula in this photograph from the International Space Station (ISS). Several large metropolitan areas are visible, marked by their relatively large and brightly lit areas, including the capital cities of Madrid, Spain—located near the center of the peninsula’s interior—and Lisbon, Portugal—located along the southwestern coastline. The ancient city of Seville, visible to the north of the Strait of Gibraltar, is one of the largest cities in Spain. The astronaut view is looking toward the east, and is part of a time-lapse series of images.

The network of smaller cities and towns along the coastline and in the interior attest to the extent of the human presence on the Iberian landscape. The blurring of city lights is caused by thin cloud cover (image left and center), while cloud tops are dimly illuminated by moonlight. Though obscured, the lights of France are visible near the horizon line on the upper left, while the lights of northern Africa are more clearly discernable at right. The faint gold and green line of airglow—caused by ultraviolet radiation exciting the gas molecules in the upper atmosphere—parallels the horizon (or Earth limb).

The Iberian Peninsula is the southwestern-most of the European peninsulas (together with the Italian and Balkan peninsulas), and includes the Principality of Andorra, as well as the Kingdom of Spain and the Portuguese Republic. The approximately 590,000 square kilometer landmass is bounded by the Atlantic Ocean to the northwest, west, and southwest and the Mediterranean Sea to the east. Its northeastern boundary is marked by the Pyrenees mountain range.

Astronaut photograph ISS030-E-10008 was acquired on December 4, 2011, with a Nikon D3S digital camera using a 24 mm lens, and is provided by the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory, Johnson Space Center. The image was taken by the Expedition 30 crew. The image has been cropped and enhanced to improve contrast. Lens artifacts have been removed. The International Space Station Program supports the laboratory as part of the ISS National Lab to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. Caption by William L. Stefanov, Jacobs Technology/ESCG at NASA-JSC.
Instrument: ISS - Digital Camera

segunda-feira, 21 de novembro de 2011

Astronomy Picture of the Day - 1 (16/06/1995)

If the Earth could somehow be transformed to the ultra-high density of a neutron star, it might appear as it does in the above computer generated figure. Due to the very strong gravitational field, the neutron star distorts light from the background sky greatly. If you look closely, two images of the constellation Orion are visible. The gravity of this particular neutron star is so great that no part of the neutron star is blocked from view - light is pulled around by gravity even from the back of the neutron star.

quarta-feira, 20 de julho de 2011

sexta-feira, 13 de novembro de 2009

Água na Lua

A NASA descobriu quantidades "significativas" de água congelada na Lua, anunciou hoje um responsável da agência espacial norte-americana.

terça-feira, 12 de agosto de 2008

100.000


O telescópio Hubble já completou 100 mil órbitas à Terra desde que foi lançado para o espaço há 18 anos. Para comemorar o feito, a NASA divulgou uma imagem, captada no domingo, da nebulosa Tarântula, que fica a 170 mil anos luz do nosso planeta azul.

segunda-feira, 26 de maio de 2008

Marte

A Phoenix aterrou com sucesso em Marte. Esta é uma das primeiras fotos.