"Sweet Jane"
2015-09-30
Astronomy picture of the day - 2015 September 30 - Seasonal Streaks Point to Recent Flowing Water on Mars
Image Credit: NASA, JPL, U. Arizona
Explanation: What creates these changing streaks on Mars? Called Recurring Slope Linea (RSL), these dark features start on the slopes of hills and craters but don't usually extend to the bottom. What's even more unusual is thatthese streaks appear to change with the season, appearing fresh and growing during warm weather and disappearing during the winter. After much study, including a recent chemical analyses, a leading hypothesis has emerged that these streaks are likely created by new occurrences of liquid salty water that evaporates as it flows. The source for the briny water is still unclear, with two possibilities being condensation from the Martian atmosphere and underground reservoirs. An exciting inference is that if these briny flows are not too salty, they may be able to support microbial life on Mars even today. The featured image of a hill inside Horowitz Crater was investigated by instruments aboard the robotic Mars Reconnaissance Orbiter that has been returning data from Mars since 2006.
2015-09-29
Conhece todos os miradouros em Lisboa?... Miradouro Anfiteatro Keil do Amaral
The largest urban forest in Europe hides an amphitheater overlooking the 25 de Abril Bridge, but in between the pines and the picnic areas of Monsanto are also other lookout points facing the city and the Tagus.
No maior parque florestal urbano da Europa encontra-se um anfiteatro com vista para a Ponte 25 de Abril, mas entre os pinheiros e os parques de merendas de Monsanto estão também outros miradouros virados para a cidade e para o Tejo.
Astronomy picture of the day - 29-09-2015 - Supermoon Total Lunar Eclipse and Lightning Storm
Image Credit & Copyright: Jose Antonio Hervás
Explanation: What's more rare than a supermoon total lunar eclipse? How about a supermoon total lunar eclipse over a lightning storm. Such an electrifying sequence was captured yesterday from Ibiza, an island in southeastern Spain. After planning the location for beauty, and the timing to capture the entire eclipse sequence, the only thing that had to cooperate for this astrophotographer to capture a memorable eclipse sequence was the weather. What looked to be a bother on the horizon, though, turned out to be a blessing. The composite picture features over 200 digitally combined images from the same location over the course of a night. The full moon is seen setting as it faded to red in Earth's shadow and then returned to normal. The fortuitous lightning is seen reflected in the Mediterranean to the right of the 400-meter tall rocky island of Es Vedra. Although the next total eclipse of a large and bright supermoon will occur in 2033, the next total eclipse of any full moon will occur in January 2018 and be best visible from eastern Asia and Australia.
Foto - "Fonte da Telha - Costa de Caparica - 16-09-2014
"Fonte da Telha"
Costa de Caparica
16-09-2014
JoanMira
2015-09-28
Portugal. “Nous sommes tous des réfugiés”
Cette semaine, l’hebdomadaire Visão consacre sa une aux réfugiés vivant déjà au Portugal. Barré du titre “Nous sommes tous des réfugiés”, le portrait de six personnes en couverture met en avant la diversité de leurs origines. Un long article revient sur les “histoires de ceux qui ont choisi le Portugal pour échapper à la mort”.
Pour illustrer le reportage, Diaby, Sabina, Obai, Ahmed, Ali, Ayad et Mubarak sont photographiés de face car, selon le journal, “ils nous regardent en face comme ils sont habitués à le faire depuis qu’ils ont regagné leur dignité”. Plusieurs fois reproduit, le hashtag#portugalacolhe (#leportugalaccueille) lancé par le magazine prend clairement position pour un accueil volontaire des migrants.
Pourtant situé à l’écart des routes migratoires, le Portugal apparaît mobilisé sur la question de l’accueil des demandeurs d’asile. Le pays, confronté à une émigration massive depuis la crise économique, se montre disposé à accueillir plus de migrants que ce que prévoient les quotas européens.
Même António Guterres, haut-commissaire de l’agence de l’ONU pour les réfugiés (ACNUR) et ancien Premier ministre portugais, a déclaré à la chaîne RTP ce 22 septembre que les capacités du pays lui permettraient de recevoir au moins 4 000 réfugiés “sans que cela ait un impact sociétal important”. Le ministère des affaires étrangères portugais a annoncé le 23 septembre que le pays irait finalement recevoir 4500 réfugiés. Les premiers quotas évoqués par la Commission européenne concernaient l’accueil de seulement 1 500 personnes.
Courrier International - France
Astronomy picture of the day - 28-09-2015 - Yesterday: A Supermoon Lunar Eclipse - Video
2015 September 27Video Credit: NASA's GSFC, David Ladd (USRA) & Krystofer Kim (USRA)
Explanation: Tonight a bright full Moon will fade to red. Tonight's moon will be particularly bright because it is reaching its fully lit phase when it is relatively close to the Earth in its elliptical orbit. In fact, by some measures of size and brightness, tonight's full Moon is designated a supermoon, although perhaps the "super" is overstated because it will be only a few percent larger and brighter than the average full Moon. However, our Moon will fade to a dim redbecause it will also undergo a total lunar eclipse -- an episode when the Moon becomes completely engulfed in Earth's shadow. The faint red color results from blue sunlight being more strongly scattered away by the Earth's atmosphere. Tonight's moon can also be called a Harvest Moon as it is the full Moon that occurs closest to the September equinox, a time signaling crop harvest in Earth's northern hemisphere. Total eclipses of supermoons are relatively rare -- the last supermoon lunar eclipse was in 1982, and the next will be in 2033. Tonight's supermoon total eclipse will last over an hour and be best visible from eastern North America after sunset, South America in the middle of the night, and Western Europe before sunrise.
2015-09-25
Pictures from my mind - "Garonne - Bordeaux" - 28-08-2015
"La Garonne"
Bordeaux, 28-08-2015
JoanMira
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