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NASA Releases an EPIC View of the Moon Transiting the Earth Taken From One Million Miles Away. La première photo complète de la Terre depuis 1972. Il ne s’agit que de la deuxième photo jamais prise où la Terre apparaît de son côté ensoleillé, et dans sa totalité.

La première photo complète de la Terre depuis 1972

La première, prise en 1972 par les astronautes de la mission Apollo 17, avait été baptisée « The Blue Marble » (« La Bille bleue »). Celle que la NASA vient de dévoiler n’a pas encore de nom mais n’en est pas moins belle (voir ici pour une version extra-grande). Elle a été prise par le Deep Space Climate Observatory (DSCOVR), un satellite lancé en février et qui, après un trajet d’1,6 million de kilomètres, a pu immortaliser notre planète avec un appareil spécialisé, le Earth Polychromatic Imaging Camera (EPIC).

On a vu notre planète en entier sur bien d’autres images depuis 1972, mais il s’agissait, rappelle la NASA, d’images composites, des clichés construits avec une multitude d’images prises par différents satellites et « cousues ensembles ». Australian student confirms that giant plasma tubes are floating above Earth. Astronomers have for the first time captured visual evidence of the existence of tubular plasma structures in the inner layers of the magnetosphere surrounding the Earth.

Australian student confirms that giant plasma tubes are floating above Earth

“For over 60 years, scientists believed these structures existed but by imaging them for the first time, we’ve provided visual evidence that they are really there,” Cleo Loi of the ARC Centre of Excellence for All-sky Astrophysics (CAASTRO) and the School of Physics at the University of Sydney said. Loi is the lead author on this research, done as part of her award-winning undergraduate thesis and published in the journal Geophysical Research Letters. “The discovery of the structures is important because they cause unwanted signal distortions that could, as one example, affect our civilian and military satellite-based navigation systems. So we need to understand them,” she said. The plasma structures are explained in this clip: The innermost layer of the magnetosphere is the ionosphere, and above that is the plasmasphere. Earth’s Other ‘Moon’ And Its Crazy Orbit Could Reveal Mysteries Of The Solar System. We all know and love the moon.

Earth’s Other ‘Moon’ And Its Crazy Orbit Could Reveal Mysteries Of The Solar System

We’re so assured that we only have one that we don’t even give it a specific name. It is the brightest object in the night sky, and amateur astronomers take great delight in mapping its craters and seas. To date, it is the only other heavenly body with human footprints. What you might not know is that the moon is not the Earth’s only natural satellite. As recently as 1997, we discovered that another body, 3753 Cruithne, is what’s called a quasi-orbital satellite of Earth.

Cruithnes Orbit To help understand why it’s called a horseshoe orbit, let’s imagine we’re looking down at the solar system, rotating at the same rate as the Earth goes round the sun. Cruithne From A Stationary Earth Position Horseshoe orbits are actually quite common for moons in the solar system. BreathingEarth1-3.gif (600×620)

Mouvements : rotation/révolution

Grâce à la Nasa, regardez la Terre respirer. Computer Graphics Group Selects NASA Earth Visuals for Showcase. Computer Graphics Group Selects NASA Earth Visuals for Showcase An annual conference that presents and publishes the best in computer graphics and technical research chose a NASA excerpt from the presentation, "Dynamic Earth: Exploring Earth's Climate Engine," as one of its select entries of 2012.

Computer Graphics Group Selects NASA Earth Visuals for Showcase

The computer visualization is titled "Coronal Mass Ejection and Ocean/Wind Circulation. " It is also published today (June 19) as the 100th story for the award-winning NASA Viz iPad application. The Association for Computer Machinery's Special Interest Group on Computer Graphics and Interactive Techniques is known as SIGGRAPH and is widely considered the most prestigious forum of its kind. "Major Hollywood studios submit pieces, so there is a high standard," says Joshua Grow, SIGGRAPH Computer Animation Festival Chair, Los Angeles. Lucas, who wrote, directed and co-produced "Dynamic Earth," says that he's proud that nearly all the visualizations are based on real-world data. www.nasa.gov. Hyper Earth: the New World in 4k UHD. Cassini a photographié la Terre depuis l'orbite de Saturne.

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Cassini a photographié la Terre depuis l'orbite de Saturne

Partager sur Facebook Partager sur Twitter Le 19 juillet dernier, la sonde Cassini a pris de nouvelles photos des anneaux de la planète Saturne autour de laquelle elle orbite. Mais elle a aussi capturé en arrière-plan, notre planète Terre sous la forme d'un minuscule point bleu. On vous avait prévenu : le 19 juillet, il fallait regarder vers le ciel et prendre la pose ! Lundi, la NASA a ainsi dévoilé quelques uns des clichés pris par Cassini samedi et la mission semble tout à fait réussie !

La Lune est également visible sur le cliché, à droite de la Terre mais est plus difficile à discerner. 2013 July 22 - Earth and Moon from Saturn. A Breathtaking Time-Lapse Video of 121-Megapixel Images of Earth - Kasia Cieplak-Mayr von Baldegg.