Catégorie

Astronomie

1254987 © Laurent Laveder / Biosphoto
51 images
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Biosphoto | 2100071 | Antenne suédoise à l'observatoire ESO, La Silla, Chili | © Alberto Ghizzi Panizza / Biosphoto
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Antenne suédoise à l'observatoire ESO, La Silla, Chili
Biosphoto | 2484518 | Artist's concept showing how Saturn might look from high above the ring plane and at a right angle to the Sun, a perspective that we could never get from the Earth nor from the Hubble Space Telescope. | © Walter Myers / Stocktrek Images / Biosphoto
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Artist's concept showing how Saturn might look from high above the ring plane and at a right angle [...]
Biosphoto | 2484495 | Illustration of astronauts setting up a base on the Martian surface around their lander vehicle. The first human visitors to Mars would face an environment nearly as hostile as the Earth's Moon. While Mars has an atmosphere, it contains no breathable oxygen and is so thin that the surface air pressure is about the same as the Earth's 18 miles above sea level. To venture outside, humans would need hardy suits that would supply pressure, oxygen, moisture, warmth, and insulate them from the fine martian dust that may be both abrasive and chemically reactive. Even with these precautions, humans would still be vulnerable to radiation from solar storms and the continual rain of interstellar cosmic rays. | © Walter Myers / Stocktrek Images / Biosphoto
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Illustration of astronauts setting up a base on the Martian surface around their lander vehicle. [...]
Biosphoto | 1632193 | Test des miroirs d'un téléscope dans un froid extrême USA ; Les techniciens achevent une série de tests cryogéniques sur six segments de miroir au béryllium du James Webb Space Telescope au centre X-ray & Cryogenic Facility . Pendant les essais, les miroirs ont été soumis à des températures extrêmes qui les plongent vers -249 degrés Celsius, ce qui permet aux ingénieurs de mesurer en détail comment la forme du miroir change quand il se refroidit. Le télescope Webb a 18 miroirs, chacun d'entre eux sera testé deux fois dans le Centre de rayons X et des installations cryogéniques pour veiller à ce que le miroir puisse maintenir sa forme dans un environnement spatial - une fois avec le béryllium poli nu et puis de nouveau après qu'une fine couche d'or soit appliquée. Les jauges d'essai cryogéniques permettent de prédire les changements de chaque miroir et comment il prendra en compte les sources de lumière infrarouge. Les miroirs sont conçus pour rester au froid afin de permettre aux scientifiques d'observer la lumière infrarouge qu'ils reflètent à l'aide d'un télescope et des instruments optimisés pour détecter cette lumière. Les objets chauds émettent de la lumière infrarouge, ou de la chaleur. Si le miroir de télescope Webb est trop chaud, la très faible lumière infrarouge des galaxies lointaines pourrait être perdue dans la lueur infrarouge du miroir lui-même. Ainsi, les miroirs du télescope Webb ont besoin pour fonctionner de rester dans un état de froid profond ou cryogénique, à environ -229 degrés Celsius. | © N.A.S.A. / Biosphoto
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Test des miroirs d'un téléscope dans un froid extrême USA ; Les techniciens achevent une série de [...]
Biosphoto | 2483784 | IC 1848, the Soul Nebula in Hubble-palette color mapping. | © Rolf Geissinger / Stocktrek Images / Biosphoto
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IC 1848, the Soul Nebula in Hubble-palette color mapping.
Biosphoto | 2484081 | The Horsehead Nebula in the constellation Orion. | © Reinhold Wittich / Stocktrek Images / Biosphoto
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The Horsehead Nebula in the constellation Orion.
Biosphoto | 2484109 | NGC 1973, The Running Man Nebula. This image captured with a telescope and a scientific CCD camera | © Reinhold Wittich / Stocktrek Images / Biosphoto
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NGC 1973, The Running Man Nebula. This image captured with a telescope and a scientific CCD camera
Biosphoto | 2482305 | A young star circled by debris. | © Frieso Hoevelkamp / Stocktrek Images / Biosphoto
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A young star circled by debris.
Biosphoto | 2483918 | Nearly 4 billion years ago, the still-molten Earth was pummeled by giant asteroids. | © Ron Miller / Stocktrek Images / Biosphoto
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Nearly 4 billion years ago, the still-molten Earth was pummeled by giant asteroids.
Biosphoto | 2484586 | In this image, the Dawn spacecraft's three xenon electrostatic ion thrusters can be seen emitting ionized xenon's characteristic blue/magenta glow, gently propelling the probe toward the dwarf planet Ceres. While the ion engines have relatively low specific thrust (about equal to the weight of a few sheets of paper), they can operate continuously for long periods making efficient use of the approximately 1,000 pounds of xenon propellant onboard. The wing-like solar arrays produce about 1,300 watts for probe's propulsion and other electrical systems. . While no close-up observations have yet been made of Ceres itself, here it is rendered as appearing similar to a much smaller version of the Earth's Moon, heavily cratered with the addition of surface water ice and hypothesized plumes of ice crystals from water geysers on its surface. . In February 2015 the unmanned Dawn spacecraft is scheduled to arrive at the dwarf planet Ceres. The 65 foot long, 2.5 ton probe was launched from the Earth in 2007, passed Mars in 2009, and went into orbit around the protoplanet Vesta in July 2011 where it stayed until September 2012. Once in orbit around Ceres, Dawn is expected to operate for about a year making observations of this largest object in the asteroid belt. | © Walter Myers / Stocktrek Images / Biosphoto
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In this image, the Dawn spacecraft's three xenon electrostatic ion thrusters can be seen emitting [...]
Biosphoto | 2498439 | Chevêche d'Athéna (Athene noctua) se posant de nuit et comète, Salamanque, Castille-et-León, Espagne | © Mario Cea Sanchez / Biosphoto
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Chevêche d'Athéna (Athene noctua) se posant de nuit et comète, Salamanque, Castille-et-León, Espagne
Biosphoto | 2484590 | A manned orbital maintenance platform (OMP) docked with a manned reusable crew capsule (RCC) in low Earth orbit ignites an auxiliary liquid-propellant rocket booster in order to lift it to a far higher Earth orbit for an eventual rendezvous with NASA's James Webb Space Telescope (JWST). At this configuration the spacecraft has a total length of 110 feet with a maximum diameter of 18 feet. | © Walter Myers / Stocktrek Images / Biosphoto
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A manned orbital maintenance platform (OMP) docked with a manned reusable crew capsule (RCC) in low [...]
Biosphoto | 2587637 | VA244 - Décollage d'Ariane 5 depuis le Centre Spatial Guyanais. Guyane française. | © Nicolas Defaux / Biosphoto
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VA244 - Décollage d'Ariane 5 depuis le Centre Spatial Guyanais. Guyane française.
Biosphoto | 2587653 | Maquette d'Ariane 5 à l'entrée du Centre Spatial Guyanais. Guyane française. | © Nicolas Defaux / Biosphoto
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Maquette d'Ariane 5 à l'entrée du Centre Spatial Guyanais. Guyane française.
Biosphoto | 2481460 | A pass of the International Space Station on the evening of January 26, 2019. The ISS is moving from right to left, southwest to southeast. . . The ISS faded and reddened naturally into sunset at top left in Taurus. Just before it did that it passed through the Hyades star cluster and just missed Aldebaran. . . The ISS seemed to track along the ecliptic here, made somewhat visible by the faint arc of the zodiacal light reaching up from the horizon at right and stretching across the sky to the upper left. The ISS coincidentally travelled parallel to, but just below the zodiacal light, which follows the ecliptic. . . Some red streaks of airglow are also visible, and I emphasized those in the colour correction to make a more colourful sky. I did the opposite to the light polluted clouds! But their yellow remains. | © Alan Dyer / Stocktrek Images / Biosphoto
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A pass of the International Space Station on the evening of January 26, 2019. The ISS is moving [...]
Biosphoto | 2484208 | NASA's Curiosity rover samples a rock on the floor of Gale Crater. | © Steven Hobbs / Stocktrek Images / Biosphoto
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NASA's Curiosity rover samples a rock on the floor of Gale Crater.
Biosphoto | 2484492 | Unlike the rolling volcanic plains of the north, the southern half of Mars is dominated by older, heavily cratered highlands. The distinctly lunar-like terrain of Terra Sirenum belies the fact that, unlike the Earth's Moon, Mars has an active atmosphere. . In this rendering the perspective is from an altitude of about 30 miles and about 30 degrees from Mars' south pole. The large crater with a central peak at the 2 o'clock position near the horizon is Liu Hsin, with a diameter of 80 miles. Just beyond Liu Hsin is the southern rim of a much larger crater named Copernicus, with a diameter of 180 miles. To the west, high-flying cirrus clouds of water ice crystals form complex patterns in the tenuous carbon dioxide atmosphere. | © Walter Myers / Stocktrek Images / Biosphoto
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Unlike the rolling volcanic plains of the north, the southern half of Mars is dominated by older, [...]
Biosphoto | 2419315 | La Voie Lactée au dessus des crêtes du Jura, Mars est visible en bas à gauche, Le ciel est illuminé par la pollution lumineuse des villes proches, malgré l'altitude. | © Jean-Philippe Delobelle / Biosphoto
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La Voie Lactée au dessus des crêtes du Jura, Mars est visible en bas à gauche, Le ciel est illuminé [...]
Biosphoto | 1255162 | Séquence d'un lever de Pleine Lune Bretagne France ; La Pleine Lune se lève dans un ciel très pur. A mesure qu'elle s'élève, elle retrouve sa couleur blanche, en même temps que son aplatissement disparaît. En revanche, son diamètre horizontal reste identique, preuve que l'impression que la Lune est plus grosse quand elle est proche de l'horizon n'est qu'une illusion ! | © Laurent Laveder / Biosphoto
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Séquence d'un lever de Pleine Lune Bretagne France ; La Pleine Lune se lève dans un ciel très pur. [...]
Biosphoto | 68067 | La surface de la Lune avec cratères et mers bien visibles | © Olivier Sauzereau / Biosphoto
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La surface de la Lune avec cratères et mers bien visibles
Biosphoto | 653092 | Enfants observant une éclipse annulaire de Soleil Java ; Eclipse annulaire de Soleil du 26 janvier 2009 | © Olivier Sauzereau / Biosphoto
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Enfants observant une éclipse annulaire de Soleil Java ; Eclipse annulaire de Soleil du 26 janvier [...]
Biosphoto | 66353 | Eclipse annulaire de Soleil en seconde phase partielle Maroc ; Eclipse annulaire de Soleil du 10/05/1994. [juste après la phase annulaire]. Site d'observation : col de Tisi-n-Ilissi | © Olivier Sauzereau / Biosphoto
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Eclipse annulaire de Soleil en seconde phase partielle Maroc ; Eclipse annulaire de Soleil du [...]
Biosphoto | 2482881 | A radio telescope is working under the Milky Way galaxy at Nanshan observatory near Urumchi, Xinjiang, China. Mars is visible near the center of galaxy. | © Jeff Dai / Stocktrek Images / Biosphoto
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A radio telescope is working under the Milky Way galaxy at Nanshan observatory near Urumchi, [...]
Biosphoto | 147567 | Enfants observant le ciel avec un télescope France | © Michel Gunther / Biosphoto
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Enfants observant le ciel avec un télescope France
Biosphoto | 493881 | Phases d'une éclipse annulaire de soleil Espagne ; Chaque vue a été prise séparément (par pas de 5 min) à l'aide d'une lunette de 120 mm de diamètre et 2000 mm de focale munie d'un filtre solaire. 3 octobre 2005 en Espagne. | © Laurent Pacelli / Biosphoto
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Phases d'une éclipse annulaire de soleil Espagne ; Chaque vue a été prise séparément (par pas de 5 [...]
Biosphoto | 2565452 | Très Grand Télescope, VLT, Very Large Telescope, Observatoire du Cerro Paranal, Anfogasta, Chili. | © Alberto Ghizzi Panizza / Biosphoto
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Très Grand Télescope, VLT, Very Large Telescope, Observatoire du Cerro Paranal, Anfogasta, Chili.
Biosphoto | 2483967 | Les planètes et les plus grandes lunes à l'échelle du Soleil. | © Ron Miller / Stocktrek Images / Biosphoto
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Les planètes et les plus grandes lunes à l'échelle du Soleil.
Biosphoto | 2484071 | The Orion Nebula | © Reinhold Wittich / Stocktrek Images / Biosphoto
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The Orion Nebula
Biosphoto | 2484183 | The Pleiades Star Cluster (M45) is located in the constellation of Taurus. | © Charles Shahar / Stocktrek Images / Biosphoto
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The Pleiades Star Cluster (M45) is located in the constellation of Taurus.
Biosphoto | 2484331 | Distant galaxy visible from space station sent in outer space. | © Tomasz Dabrowski / Stocktrek Images / Biosphoto
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Distant galaxy visible from space station sent in outer space.
Biosphoto | 2565431 | Télescopes AT, Très Grand Télescope, VLT, Very Large Telescope, Désert d'Atacama, Chili | © Alberto Ghizzi Panizza / Biosphoto
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Télescopes AT, Très Grand Télescope, VLT, Very Large Telescope, Désert d'Atacama, Chili
Biosphoto | 2483337 | An artist's depiction of the close pass of comet C/2013 A1 over the Martian landscape. Also known as comet Siding Spring, which is the Australian observatory that discovered the object, it is scheduled to pass by Mars in October of 2014. Rover image courtesy of NASA. | © Marc Ward / Stocktrek Images / Biosphoto
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An artist's depiction of the close pass of comet C/2013 A1 over the Martian landscape. Also known [...]
Biosphoto | 2483440 | Artist's concept of an astronaut floating in outer space. A cloud covered Earth is below. | © Marc Ward / Stocktrek Images / Biosphoto
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Artist's concept of an astronaut floating in outer space. A cloud covered Earth is below.
Biosphoto | 2483503 | An artist's depiction of the constellation Virgo the Virgin. The constellation includes the star Spica and the beautiful galaxy Messier 104, also known as the Sombrero Galaxy. Virgo is one of the twelve astrological signs of the Zodiac. | © Marc Ward / Stocktrek Images / Biosphoto
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An artist's depiction of the constellation Virgo the Virgin. The constellation includes the star [...]
Biosphoto | 2484107 | Messier 31, the Andromeda Galaxy. This image captured with a telescope and a scientific CCD camera. | © Reinhold Wittich / Stocktrek Images / Biosphoto
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Messier 31, the Andromeda Galaxy. This image captured with a telescope and a scientific CCD camera.
Biosphoto | 2484166 | Comet NEOWISE (C/2020 F3). | © Reinhold Wittich / Stocktrek Images / Biosphoto
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Comet NEOWISE (C/2020 F3).
Biosphoto | 2484167 | Horsehead Nebula (Barnard 33) and Flame Nebula (NGC 2024). | © Reinhold Wittich / Stocktrek Images / Biosphoto
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Horsehead Nebula (Barnard 33) and Flame Nebula (NGC 2024).
Biosphoto | 2484510 | A full Neptune washes Triton's frozen surface with an indigo light, the only source of illumination on this now Triton's dark side. Fortuitous alignment of the Sun, Triton and Neptune causes this satellite's shadow to fall on Neptune's distant cloud tops 220 thousand miles away. This view is from within a deep, crater-like depression on Triton's northern hemisphere. . There are many such crater-like depressions on Triton's northern hemisphere. While these depressions look like impact craters, their similar size and spacing suggest that they were created by some other process. Their origin is still unknown, but may involve local melting and collapse of the icy surface. The scarcity of impact craters suggest that this surface is relatively young by solar system standards, probably less than a few billion years old. The depression in this image is about 15 miles in diameter; the ridge on the horizon is approximately seven miles from the mesa in the foreground. | © Walter Myers / Stocktrek Images / Biosphoto
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A full Neptune washes Triton's frozen surface with an indigo light, the only source of illumination [...]
Biosphoto | 2484572 | This is how auroras on Jupiter's north pole might look from a distance of about a quarter million miles. On the Sunlit side can be seen churning clouds of ammonia ice, ammonium hydrosulfide, and water ice. The dark side reveals a dazzling aurora and brilliant flashes of lightning hundreds of times brighter than lightning on Earth. . Unlike Earth's north and south pole auroras which are powered by charged particles from the Sun, auroras on Jupiter are driven by particles emitted by Jupiter's volcanic moon Io. Io in fact leaves a distinct auroral footprint on Jupiter's poles, seen here as a whitish dot with a trailing, comet-like tail at the seven 0'clock position. Jupiter's moons Europa and Ganymede also have corresponding, albeit fainter footprints on the far side of the larger auroral oval. | © Walter Myers / Stocktrek Images / Biosphoto
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This is how auroras on Jupiter's north pole might look from a distance of about a quarter million [...]
Biosphoto | 2484634 | 360 panorama of the Milky Way with reflection of stars over Lake Elton salt lake in Russia. | © Yuri Zvezdny / Stocktrek Images / Biosphoto
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360 panorama of the Milky Way with reflection of stars over Lake Elton salt lake in Russia.
Biosphoto | 2481402 | The constellation of Aquila (at centre) surrounded by Scutum and its starcloud (below) and Serpens and Ophiuchus (at right to the west). Altair is the bright star left of centre, with Tarazed above it. Albireo in Cygnus is at the very top. . Above Aquila and below Albireo are the small constellations of Sagitta, Vulpecula and Delphinus (the latter at left). The Coathanger asterism is visible at top in the Milky Way, as are the large open clusters IC 4756 and NGC 6633, the S-O Double Cluster, at right straddling the Serpens-Ophiuchus border. | © Alan Dyer / Stocktrek Images / Biosphoto
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The constellation of Aquila (at centre) surrounded by Scutum and its starcloud (below) and Serpens [...]
Biosphoto | 1255091 | Filé d'Etoiles au dessus de l'observatoire du Pic du Midi ; Les étoiles de la constellation d'Orion laissent des traînées au-dessus d'une des coupoles de l'observatoire du Pic du Midi, et notamment les 3 traces parallèles de la Ceinture d'Orion. Plus haut se trouve le Taureau. | © Laurent Laveder / Biosphoto
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Filé d'Etoiles au dessus de l'observatoire du Pic du Midi ; Les étoiles de la constellation d'Orion [...]
Biosphoto | 1255119 | Couronne solaire lors d'une éclipse totale de Soleil Turquie | © Laurent Laveder / Biosphoto
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Couronne solaire lors d'une éclipse totale de Soleil Turquie
Biosphoto | 1255019 | Station spatiale internationale passant devant le Soleil ; ISS passe devant le disque du Soleil. Au rythme de 3 images par seconde, la station spatiale a laissé 7 fois sa silhouette noire. En haut à droite, un détail de la meilleure des photos. Un petite tache solaire est visible à gauche du centre du Soleil. | © Laurent Laveder / Biosphoto
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Station spatiale internationale passant devant le Soleil ; ISS passe devant le disque du Soleil. Au [...]
Biosphoto | 2007954 | Crépuscule astronomique à Penmarc'h - Bretagne France ; De fins nuages (des cirrus) diffusent la lumière des étoiles et permettent d'en apprécier l'éclat et la couleur. Les cirrus sont orangés à gauche car ils reflètent la lumière des lampadaires orangés, tandis qu'à droite, ils sont sombres car le ciel au-dessus de l'océan est dénué de pollution lumineuse. La Voie lactée apparaît dans une trouée nuageuse au-dessus du sémaphore de Penmarc'h. Tout à droite, l'astre le plus brillant est Saturne. | © Laurent Laveder / Biosphoto
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Crépuscule astronomique à Penmarc'h - Bretagne France ; De fins nuages (des cirrus) diffusent la [...]
Biosphoto | 2035675 | Lumière zodiacale à la Pointe du Van - Bretagne France ; En prenant une photo toutes les 10 minutes, on voit comment la lumière zodiacale apparaît dans un ciel de plus en plus sombre. La dernière photo a été prise juste après la fin du crépuscule astronomique qui correspond au début de la vraie nuit noire. | © Laurent Laveder / Biosphoto
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Lumière zodiacale à la Pointe du Van - Bretagne France ; En prenant une photo toutes les 10 [...]
Biosphoto | 2315343 | Piliers de la création, Observatoire ESO de La Silla, Atacama, Chili | © Alberto Ghizzi Panizza / Biosphoto
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Piliers de la création, Observatoire ESO de La Silla, Atacama, Chili
Biosphoto | 2527226 | Coucher de soleil sur le Mont Ventoux depuis la montagne de Lure, Alpes de Haute Provence, France | © David Tatin / Biosphoto
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Coucher de soleil sur le Mont Ventoux depuis la montagne de Lure, Alpes de Haute Provence, France
Biosphoto | 2458262 | Ciel étoilé en Ardèche, la Voie Lactée, Jupiter et Saturne brillent dans un ciel pur, au nord du Mont Gerbier des Joncs, visible au milieu de l'horizon (pose de 4 minutes), France | © Jean-Philippe Delobelle / Biosphoto
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Ciel étoilé en Ardèche, la Voie Lactée, Jupiter et Saturne brillent dans un ciel pur, au nord du [...]
Biosphoto | 1254987 | Cône d'ombre de la Terre provoquant l'éclipse de Lune ; Cone of Earth's shadow causing the eclipse of the Moon | © Laurent Laveder / Biosphoto
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Cône d'ombre de la Terre provoquant l'éclipse de Lune ; Cone of Earth's shadow causing the eclipse [...]