Moon, Mars, and Milky Way - Astronomy picture of the day - 2018 August 11

Moon, Mars, and Milky Way 
Image Credit & Copyright: Taha Ghouchkanlu (TWAN)

Explanation: Just two weeks ago, dark skies over the desert in northern Iran held this alluring celestial vista. The dramatic digital mosaic finds the Moon and Mars alongside the Milky Way's dusty rifts, stars, and nebulae. Captured through a series of exposures to cover a range in brightness, that night's otherwise Full Moon is immersed in Earth's shadow. It actually appears fainter and redder than the Red Planet itself during the widely watched total lunar eclipse.For cosmic tourists, the skyscape also includes the Lagoon (M8) and Trifid (M20) nebulae and planet Saturn shining against the Milky Way's pale starlight. The Moon isn't quite done with its shadow play, though. Today, the New Moon partially eclipses the Sun for much of northern planet Earth.

Spiral Galaxy NGC 6744 -Astronomy picture of the day - 2018 August 10

Spiral Galaxy NGC 6744 
Image Credit & Copyright: Martin Pugh

Explanation: Beautiful spiral galaxy NGC 6744 is nearly 175,000 light-years across, larger than our own Milky Way. It lies some 30 million light-years distant in the southern constellation Pavo and appears as only a faint, extended object in small telescopes. We see the disk of the nearby island universe tilted towards our line of sight. This remarkably detailed galaxy portrait covers an area about the angular size of the full moon. In it, the giant galaxy's elongated yellowish core is dominated by the light from old, cool stars. Beyond the core, grand spiral arms are filled with young blue star clusters and speckled with pinkish star forming regions. An extended arm sweeps past a smaller satellite galaxy at the upper left. NGC 6744's galactic companion is reminiscent of the Milky Way's satellite galaxy the Large Magellanic Cloud.

Red Planet, Red Moon, and Mars - Astronomy picture of the day - 2018 August 9

Red Planet, Red Moon, and Mars 
Image Credit & Copyright: Alex Cherney (Terrastro, TWAN)

Explanation: Mars is also known as The Red Planet, often seen with a reddish tinge in dark night skies. Mars shines brightly at the upper left of this gorgeous morning twilight view from Mornington Peninsula, Victoria, Australia, but the Moon and planet Earth look redder still. Taken on July 27, the totally eclipsed Moon is setting. It looks reddened because the Earth's umbral shadow isn't completely dark. Instead Earth's shadow is suffused with a faint red light from all the planet's sunsets and sunrises seen from the perspective of an eclipsed Moon. The sunsets and sunrises are reddened because Earth's atmosphere scatters blue light more strongly than red, creating the faint bluish twilight sky. Of course, craggy seaside rocks also take on the reddened colors of this Australian sunrise.

Os Paises que mais seguiram este blogue desde o inicio - Estatisticas

U.S.A. - 2125

FRANCE - 1278

BRASIL - 452

ALEMANHA - 452

BELGICA - 358

CANADA - 332

EMIRADOS ARABES UNIDOS - 288

PORTUGAL - 221

PERU - 174

UCRÂNIA - 60

Eclipsed Moon and Mars over Mountains - Astronomy picture of the day - 2018 August 7

Eclipsed Moon and Mars over Mountains 
Image Credit & Copyright: Clément Brustel

Explanation: There is something unusual about this astronomically-oriented photograph. It's not obvious -- it was discovered only during post-processing. It is not the Moon, although capturing the Moon rising during a total lunar eclipse is quite an unusually interesting sight. (Other interesting images also captured during last month's eclipse can be found here.) It is not Mars, found to the lower right of the Moon, although Mars being captured near its brightest also makes for an unusually interesting sight. (Mars is visible nearly the entire night this month; other interesting images of it can be found here.) It is not the foreground mountains, although the French Alps do provide unusually spectacular perspectives on planet Earth. (Other interesting mountainous starscapes can be found here.) It is the goat.

Claude Debussy - "Rêverie" - Diapos - Musique

"Rêverie"

Live: Cosmic Rays from Minnesota - Astronomy picture of the day - 2018 August 6

Live: Cosmic Rays from Minnesota 
Image Credit: Fermilab, NuMI, NOvA Collaboration

Explanation: Cosmic rays from outer space go through your body every second. Typically, they do you no harm. The featured image shows some of these fast moving particles as streaks going through Fermilab's NOvA Far Detectorlocated in Ash River, Minnesota, USA. Although the image updates every 15 seconds, it only shows cosmic rays that occurred over a (changing) small fraction of that time, and mostly shows only one type of particle: muons. TheNOvA Far Detector's main purpose is not to detect cosmic rays, though, but rather neutrinos from the NuMI beam shot through the Earth from Fermilab near Chicago, Illinois, USA, 810 kilometers away. Only a few neutrino events are expected in NOvA per week, though. The NuMI / NOvA experiment is allowing humanity to better explore the nature of neutrinos, for example how frequently they change type during their trip. Cosmic rays themselves werediscovered only about 100 years ago and can not only alter computer memory, but may have helped to create DNA mutations that resulted in, eventually, humans.

Carro movido a água salgada fez 150 mil quilómetros sem poluição - Artigo

A ideia de usar água como combustível é antiga, mas não é fácil de transportar para a prática. Neste momento, apenas um construtor está a testar um carro do género, a nanoFlowcell, uma marca experimental que acabou de completar 150 mil quilómetros em testes de estrada com o seu modelo mais recente, o citadino Quantino.

O sistema da nanoFlowcell funciona como uma célula de combustível, mas usa água salgada ionizada em vez de hidrogénio. Neste caso, o líquido com iões positivos fica separado do líquido com iões negativos. Quando ambos passam por uma membrana, os iões interagem, gerando energia elétrica que é usada para mover o automóvel. O resultado final é água, tal como numa célula de combustível de hidrogénio, permitindo ao automóvel funcionar com emissões zero e reabastecimento rápido.

Desde 2014 que a empresa alemã tem vindo a desenvolver protótipos, como o desportivo e-Sportlimousine, o crossover Quant F e o compacto Quantino. Estes têm sido testados em estrada, com o Quantino a mostrar a validade do conceito. Depois de ter completado 100 mil quilómetros em agosto do ano passado, o carro alemão atingiu agora os 150 mil quilómetros em meio ao tráfego. Durante os testes, conseguiu percorrer 1000 quilómetros durante 8 horas e 21 minutos, sem necessitar de reabastecimento.

Tuga Press

Trapezium: At the Heart of Orion - Astronomy picture of the day - 2018 August 5

Trapezium: At the Heart of Orion 
Image Credit: Data: Hubble Legacy Archive, Processing: Robert Gendler

Explanation: Near the center of this sharp cosmic portrait, at the heart of the Orion Nebula, are four hot, massive stars known as the Trapezium. Gathered within a region about 1.5 light-years in radius, they dominate the core of the dense Orion Nebula Star Cluster. Ultraviolet ionizing radiation from the Trapezium stars, mostly from the brightest star Theta-1 Orionis C powers the complex star forming region's entire visible glow. About three million years old, the Orion Nebula Cluster was even more compact in its younger years and a recent dynamical study indicates that runaway stellar collisions at an earlier age may have formed a black hole with more than 100 times the mass of the Sun. The presence of a black hole within the cluster could explain the observed high velocities of the Trapezium stars. The Orion Nebula's distance of some 1,500 light-years would make it the closest known black hole to planet Earth.

Central Cygnus Skyscape - Astronomy picture of the day - 2018 August 4

Central Cygnus Skyscape 
Image Credit & Copyright: Mauro Narduzzi (acquisition) / Roberto Colombari (processing)

Explanation: Supergiant star Gamma Cygni lies at the center of the Northern Cross, famous asterism in the constellation Cygnus the Swan. Known by its proper name, Sadr, the bright star also lies at the center of this gorgeous skyscape, featuring a complex of stars, dust clouds, and glowing nebulae along the plane of our Milky Way galaxy. The field of view spans almost 4 degrees (eight Full Moons) on the sky and includes emission nebula IC 1318 and open star cluster NGC 6910. Left of Gamma Cygni and shaped like two glowing cosmic wings divided by a long dark dust lane, IC 1318's popular name is understandably the Butterfly Nebula. Above and left of Gamma Cygni, are the young, still tightly grouped stars of NGC 6910. Some distance estimates for Gamma Cygni place it at around 1,800 light-years while estimates for IC 1318 and NGC 6910 range from 2,000 to 5,000 light-years.