"A guerra dos meninos"
2016-09-28
Astronomy picture of the day - 2016 September 28 - NGC 3576: The Statue of Liberty Nebula
Image Credit & Copyright: S. Mazlin, J. Harvey, R. Gilbert, & D. Verschatse (SSRO/PROMPT/UNC)
Explanation: What's happening in the Statue of Liberty nebula? Bright stars and interesting molecules are forming and being liberated. The complex nebula resides in the star forming region called RCW 57. This image showcases dense knots of dark interstellar dust, bright stars that have formed in the past few million years, fields of glowing hydrogen gas ionized by these stars, and great loops of gas expelled by dying stars. A detailed study of NGC 3576, also known as NGC 3582 and NGC 3584, uncovered at least 33 massive stars in the end stages of formation, and the clear presence of the complex carbon molecules known as polycyclic aromatic hydrocarbons (PAHs). PAHs are thought to be created in the cooling gas of star forming regions, and their development in the Sun's formation nebula five billion years ago may have been an important step in the development of life on Earth. The featured image was taken at theCerro Tololo Inter-American Observatory in Chile.
2016-09-27
Astronomy picture of the day - 2016 September 27 - Jupiter's Europa from Spacecraft Galileo
Image Credit: Galileo Project, JPL, NASA
Explanation: What mysteries might be solved by peering into this crystal ball? In this case, the ball is actually a moon of Jupiter, the crystals are ice, and the moon is not only dirty but cracked beyond repair. Nevertheless, speculation is rampant that oceans exist under Europa's fractured ice-plains that could support life. This speculation was bolstered again this week by released images from the Hubble Space Telescope indicating that plumes of water vapor sometimes emanate from the ice-crusted moon -- plumes that might bring microscopic sea life to the surface. Europa, roughly the size of Earth's Moon, is pictured here in natural color as photographed in 1996 by the now-defunct Jupiter-orbiting Galileo spacecraft. Future observations by Hubble and planned missions such as the James Webb Space Telescope later this decade and a Europa flyby mission in the 2020s may further humanity's understanding not only of Europa and the early Solar System but also of the possibility that life exists elsewhere in the universe.
Imagens de Lisboa - Interiores secretos - Capela de Santo Amaro
This chapel was founded in 1549 in dedication to St. Maurus. It’s one of the greatest artistic curiosities in the city, but seems to have become completely forgotten. It’s almost always closed, opening only for Mass once a month (on the first Sunday). It was believed that St. Maurus healed broken legs and arms, so many of the magnificent 17th-century polychrome tiles that decorate the entrance walls illustrate those limbs. Inside, a panel depicts the legend of a boat about to sink that was saved by St. Maurus, allowing the crew to dock on this site. From outside there’s a nice view of 25 de Abril Bridge.
Esta capela fundada em 1549, dedicada a Santo Amaro, é uma das maiores curiosidades artísticas da cidade mas muito poucos a conhecem. Encontra-se quase sempre fechada, abrindo apenas para missa uma vez ao mês (no primeiro domingo). Acreditava-se que Santo Amaro curava as pernas e braços partidos, por isso muitos dos magníficos azulejos policromos do século XVII, que decoram as paredes da entrada, ilustram esses membros. No interior, um painel representa a lenda de um barco prestes a afundar-se, mas que é salvo por Santo Amaro, podendo assim a tripulação desembarcar neste local. Do exterior há uma bela vista para a Ponte 25 de Abril.
2016-09-26
Astronomy picture of the day - 2016 September 26 - Gaia: Here Comes the Sun
Image Credit: Galaxy Illustration: Nick Risinger (skysurvey.org), Star Data: Gaia Mission, ESA, Antoni Sagristà Sellés (U. Heidelberg) et al.
Explanation: What would it look like to return home from outside our galaxy? Although designed to answer greater questions, recent data from ESA's robotic Gaia mission is helping to provide a uniquely modern perspective on humanity's place in the universe. Gaia orbits the Sun near the Earth and resolves star's positions so precisely that it can determine a slight shift from its changing vantage point over the course of a year, a shift that is proportionately smaller for more distant stars -- and so determines distance. In the first sequence of the video, an illustration of the Milky Way is shown that soon resolves into a three-dimensional visualization of Gaia star data. A few notable stars are labelled with their common names, while others stars are labelled with numbers from Gaia's catalog. Eventually the viewer arrives at our home star Sol (the Sun), then resolving the reflective glow of its third planet: Earth. The featured video is based on just over 600,000 stars, but Gaia is on track to measure the parallax distances to over one billion stars over its planned five year mission.
2016-09-25
Astronomy picture of the day - 2016 September 25 - Saturn from Above
Image Credit: NASA, JPL-Caltech, Space Science Institute
Explanation: This image of Saturn could not have been taken from Earth. No Earth based picture could possibly view the night side of Saturn and the corresponding shadow cast across Saturn's rings. Since Earth is much closer to the Sun than Saturn, only the day side of the ringed planet is visible from the Earth. In fact, this image mosaic was taken earlier this year by the robotic Cassini spacecraft now orbiting Saturn, just before filming a 44-hour video of Saturn rotating. The beautiful rings of Saturn are seen in full expanse, while cloud details are visible including the polar hexagon surrounding the north pole. The Cassini mission is now in its final year as the spacecraft is scheduled to be programmed to dive into Saturn's atmosphere next September.
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