Un niño rescata a una cría de gato que cayó a un río después de una operación de demolición de casas en Las Piñas, al sur de Manila (Filipinas).
FRANCIS R. MALASIG EFE
2017-06-29
Imagenes del Mundo - Berna (Suiza)
Un rayo cae durante una tormenta eléctrica en la ciudad de Berna (Suiza).
ANTHONY ANEX EFE
Imagenes del Mundo - Bombay (India)
RAJANISH KAKADE AP
Imagens - Monumentos de Portugal - Mosteiro dos Jeronimos
Iniciado em 1501, no reinado de D. Manuel I, viria a ser concluído já no reinado de D. João III. Com a sua fachada de 300 metros, juntamente com a vizinha Torre de Belém, é um dos mais emblemáticos exemplos do chamado estilo manuelino, uma derivação do gótico em que abundam os pormenores decorativos com motivos náuticos, em celebração da epopeia dos descobrimentos. Está classificado como património mundial pela UNESCO.
Astronomy picture of the day - 2017 June 29 - Symbiotic R Aquarii
Image Credit: X-ray - NASA,CXC,SAO, R. Montez et al.; Optical - Adam Block, Mt. Lemmon SkyCenter, U. Arizona
Explanation: A long recognized naked-eye variable star, R Aquarii is actually an interacting binary star system, two stars that seem to have a close, symbiotic relationship. About 710 light years away, it consists of a cool red giant star and hot, dense white dwarf star in mutual orbit around their common center of mass. The binary system's visible light is dominated by the red giant, itself a Mira-type long period variable star. But material in cool giant star's extended envelope is pulled by gravity onto the surface of the smaller, denser white dwarf, eventually triggering a thermonuclear explosion and blasting material into space. Optical image data (red) shows the still expanding ring of debris originating from a blast that would have been seen in the early 1770s. The evolution of less understood energetic events producing high energy emission in the R Aquarii system has been monitored since 2000 using Chandra X-ray Observatory data (blue). The composite field of view is less that a light-year across at the estimated distance of R Aquarii.
2017-06-28
Astronomy picture of the day - 2017 June 28 - Composite Messier 20 and 21
Image Credit & Copyright: Martin Pugh
Explanation: The beautiful Trifid Nebula, also known as Messier 20, lies about 5,000 light-years away, a colorful study in cosmic contrasts. It shares this nearly 1 degree wide field with open star cluster Messier 21 (top left). Trisected by dust lanes the Trifid itself is about 40 light-years across and a mere 300,000 years old. That makes it one of the youngest star forming regions in our sky, with newborn and embryonic stars embedded in its natal dust and gas clouds. Estimates of the distance to open star cluster M21 are similar to M20's, but though they share this gorgeous telescopic skyscape there is no apparent connection between the two. M21's stars are much older, about 8 million years old. M20 and M21 are easy to find with even a small telescope in the nebula rich constellation Sagittarius. In fact, this well-composed scene is a composite from two different telescopes. Using narrowband data it blends a high resolution image of M20 with a wider field image extending to M21.
2017-06-26
Astronomy picture of the day - 2017 June 26 - Artistic Impression: The Surface of TRAPPIST-1f
Illustration Credit: NASA, JPL-Caltech, Spitzer Team, T. Pyle (IPAC)
Explanation: If you could stand on the surface of the newly discovered Earth-sized exoplanet TRAPPIST-1f, what would you see? Presently, no Earthling knows for sure, but the featured illustration depicts a reasoned guess based on observational data taken by NASA's Sun-orbiting Spitzer Space Telescope. In 2017, four more Earth-sized planets were found by Spitzer, including TRAPPIST-1f, in addition to three discovered in 2015 from the ground. From theplanet's surface, near the mild terminator between night and day, you might see water, ice, and rock on the ground, while water-based clouds might hover above. Past the clouds, the small central star TRAPPIST-1 would appear more red than our Sun, but angularly larger due to the close orbit. With seven known Earth-sized planets -- many of which pass near each other -- the TRAPPIST-1 system is not only a candidate to have life, but intercommunicating life -- although a preliminary search has found no obvious transmissions.
2017-06-25
Astronomy picture of the day - 2017 June 25 - The N44 Superbubble
Image Credit & Copyright: Gemini Obs., AURA, NSF
Explanation: What created this gigantic hole? The vast emission nebula N44 in our neighboring galaxy the Large Magellanic Cloud has a large, 250 light-year hole and astronomers are trying to figure out why. One possibility is particle winds expelled by massive stars in the bubble's interior that are pushing out the glowing gas. This answer was found to be inconsistent with measured wind velocities, however. Another possibility is that the expanding shells of oldsupernovas have sculpted the unusual space cavern. An unexpected clue of hot X-ray emitting gas was recently been detected escaping the N44 superbubble. The featured image was taken in three very specific colors by the huge 8-meter Gemini South Telescope on Cerro Pachon in Chile.
2017-06-24
Astronomy picture of the day - 2017 June 24 - Solstice Conjunction over Budapest
Image Credit & Copyright: György Soponyai
Explanation: Before a solstice Sun rose on June 21, brilliant Venus and an old crescent Moon posed together over Budapest, Hungary for this predawn skyscape. In the foreground the view looks across the Danube river from Buda to Pest toward the dome and peaks of the Hungarian Parliament building. Low clouds are in silhouette against a twilight sky. But far enough above the eastern horizon to catch the sunlight shines another seasonal apparition on that solstice morning, noctilucent clouds. Seen near sunrise and sunset in summer months at high latitudes, the night-shining clouds are formed as water vapor in the cold upper atmosphere condenses on meteoric dust or volcanic ash near the edge of space.
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