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Monochromatic Patagonia on Behance. La Terre vue de Saturne par la sonde spatiale Cassini. Cassini photographie la Terre depuis la banlieue de Saturne à 1,4 milliards de km de distance. En orbite autour de Saturne depuis 2004, la sonde spatiale Cassini (NASA/ESA) s’est glissée ces 20 et 21 juillet 2013 dans la partie nocturne de la planète géante afin de photographier la Terre et son petit compagnon inséparable, la Lune. Une belle occasion de nous découvrir, nous, sur cette petite boule brillante distante d’environ 1,44 milliards de kilomètres. A noter que la NASA et le JPL invitaient les habitants de notre petite planète bleue ( “pale blue dot” ) qui le souhaitaient à se retrouver pour saluer la planète aux anneaux au moment où, là-bas, le vaisseau réalisait le cliché.

En prenant compte tout de même du temps que la lumière met pour franchir cette distance. Une première dans notre petite histoire. Comet and galaxy: Stunning photo of comet Pan-STARRS near the Andromeda Galaxy. En photos, déferlante d’aurores boréales dans le ciel du printemps. La région active AR 1719 à la surface du Soleil (photo SDO) Il y a tout juste une semaine, le 11 avril 2013 à précisément 7h16 TU (9h16 en France métropolitaine), un flux de particules électriquement chargées s’échappait de la surface du Soleil, depuis la région active AR 1719 située face à la Terre.

Une éjection de masse coronale ( Coronal Mass Ejection, CME ) d’une ampleur modérée issue d’une éruption solaire classée M6. Ejection de masse coronale du 11 avril 2013 photographiée par la sonde spatiale SoHO ; les particules éjectées voyagent vers la Terre à environ 1000 km/s. ; le Soleil est masqué artificiellement par le disque sombre. Le gros point lumineux en bas, à gauche du Soleil est Vénus. En vidéo : magie des aurores boréales dans le ciel de Norvége.

Jaw-Dropping Slow Motion Footage of Lightning Shot at 7,207 FPS. Pachydermosphere/ 25 July 2012. KaBLAM! Footage of the X-class solar flare. This is Our Planet. Module une nouvelle Humanité ! - Les plus belles aurores boréales de ces dernières semaines (vidéo) Icelands disruptive volcano.

Eclipse_solaire

Aurore Boréale. Ciel ma planète me donne le tournis. Icy swirls around a patient volcano. An eclipse from space with a two-way Moon. This is pretty wild: a partial solar eclipse on March 4, 2011 as seen from NASA’s Solar Dynamics Observatory!

An eclipse from space with a two-way Moon

Watch as the Moon slips in front of the face of the Sun in this video: Cool! In this far-ultraviolet view, you can see magnetic activity on the Sun’s surface, like arcing gas eruptions and sunspots (which are dark in visible light, but very bright in the UV), and the roiling, bubbling motion as pockets of hot solar gas rise and fall. Then, suddenly, the Moon makes its appearance! When I first saw this, I was surprised the Moon appeared to reverse direction. On the right is a diagram (not to scale, duh) I put together to illustrate the situation. Now imagine the Sun is way off the top of the diagram. So at different points in its orbit, SDO sees the Moon moving in opposite directions.

Pretty cool, huh? Aurore polaire. The Angry Red Galaxy. [Bonus points to any middle-aged readers who recognize the title*.]

The Angry Red Galaxy

I still get a thrill every time I see a particularly beautiful image of an astronomical object. But there are some that transcend that beauty, adding a dimension of what-the-what? That makes them just that much cooler. Like, say, this amazing image of the core of the nearby galaxy M51, taken using Hubble: [Click to enwhirlpoolenate, or grab the high-res 2 Mb version.] That is not the swirling drain of despair and fear leading into the mouth of hell. What it actually shows is the dust in the inner region of M51, clearly tracing the spiral arms of this magnificent galaxy. How this image was made is interesting, too. The infrared image was taken at a wavelength of 1.6 microns — a little more than twice the wavelength of the reddest light the eye can see — where warm dust glows well. I’ve seen M51 through a good ‘scope, and the spiral pattern can be seen pretty well. Image credits: NICMOS Image: NASA, ESA, M. Los Cielos del Ecuador, Chimborazo Volcano. With an altitude of 6268 meters (20564 ft) above sea level, Chimborazo volcano is the highest summit in Ecuador but of course not the highest summit on the planet.

Los Cielos del Ecuador, Chimborazo Volcano

This record belongs to Mount Everest (8848 metres / 29029 ft above sea level). However, because the Earth is not a perfect sphere but rather an oblate spheroid (a sphere flattened along the axis from pole to pole such that there is a bulge around the equator) and that Chimborazo is very close to the equator line (only -1 degree in latitude), Chimborazo is known as the "the farthest location from the center of the Earth". 6384.687 Km against 6382.467 Km for Everest that is, a difference of 2.220 Km/1.38 miles.