background preloader

NASA Live - Earth From Space (HDVR) ♥ ISS LIVE FEED #AstronomyDay2017 □

NASA Live - Earth From Space (HDVR) ♥ ISS LIVE FEED #AstronomyDay2017 □
Related:  Space, the final frontier

Current position of the ISS Elon Musk’s Mars project is the ultimate symbol of our throwaway culture | Life and style Elon Musk made some rather wild promises at the International Astronautical Congress last week: his SpaceX company is going to start sending people to Mars by 2024, and in 40 to 100 years, he will have a million of us living there. I have one big question about this. Why bother? Mars is a rotten place to live. You can’t breathe, eat, drink or go outdoors; the soil’s toxic, constant radiation streams in from space, and the average temperature is -60C. It looks rather bleak to me, but for some people I suppose the clincher would be that messages home would take 15 minutes, and “it would be hard to Skype with anybody”, according to Ashwin Vasavada of Nasa’s Mars Science Laboratory. But Musk is determined to plough on, make us a “multi-planet species” and turn Mars into “a really nice place to be”. There is being adventurous and curious, and then there is being overambitious, verging on potty.

Station spatiale internationale Station spatiale internationale(en) International Space Station(ru) Международная космическая станция La Station spatiale internationale a de nombreux détracteurs qui lui reprochent son coût, estimé à près de 115 milliards de dollars américains, que ne justifient pas, selon eux, les résultats scientifiques obtenus ou potentiels. Les partisans de la Station spatiale internationale mettent en avant l'expérience acquise dans le domaine des séjours longs en orbite et l'importance symbolique d'une présence permanente de l'homme dans l'espace. Son abandon et sa désorbitation devraient intervenir en 2030 et 2031. Historique[modifier | modifier le code] Station spatiale Skylab (1973-1979)[modifier | modifier le code] La NASA amorce les premières réflexions sur un projet de station spatiale placée en orbite terrestre au début des années 1960. De 1963 à 1966, le projet de station spatiale commence à se préciser : celle-ci doit utiliser le matériel développé pour le programme Apollo. (en) John E.

Gravitational waves: breakthrough discovery after two centuries of expectation | Science Physicists have announced the discovery of gravitational waves, ripples in the fabric of spacetime that were first anticipated by Albert Einstein a century ago. “We have detected gravitational waves. We did it,” said David Reitze, executive director of the Laser Interferometer Gravitational-Wave Observatory (Ligo), at a press conference in Washington. The announcement is the climax of a century of speculation, 50 years of trial and error, and 25 years perfecting a set of instruments so sensitive they could identify a distortion in spacetime a thousandth the diameter of one atomic nucleus across a 4km strip of laserbeam and mirror. The phenomenon detected was the collision of two black holes. At the beginning of the signal, their calculations told them how stars perish: the two objects had begun by circling each other 30 times a second. The observation signals the opening of a new window on to the universe. Thursday’s announcement was the unequivocal first detection ever of gravity waves.

'A new way to study our universe': what gravitational waves mean for future science | Science You wait 100 years for a gravitational wave and then four come along at once. Or so it must seem to those who spent decades designing and building the exquisite instruments needed to sense the minuscule ripples in spacetime that Albert Einstein foresaw in his 1905 theory of general relativity. The first gravitational wave bagged by physicists reached Earth on 14 September 2015 and sent a quiver through the US-based Laser Interferometer Gravitational-Wave Observatory (Ligo). The second hit three months later, on Boxing Day, followed by a third in January this year. When the fourth wave arrived in August, both Ligo and a second observatory in Italy, named Virgo, recorded the moment. Each of the gravitational waves had been set in motion by violent collisions between black holes more than a billion years ago. “This is a story in two parts,” said Sheila Rowan, director of the Institute for Gravitational Research at the University of Glasgow. Gravitational waves are not so easily blocked.

Why are astronomers interested in gravitational waves? (Intermediate) - Curious About Astronomy? Ask an Astronomer When you look up at the night sky, you see a very particular view of the Universe. You see electromagnetic radiation, light, at optical wavelengths from objects like stars. If your eyes could see radio waves, which are another wavelength of light, they would see a very different picture of the Universe. The sources of radio light are different than the sources of optical light. Astronomers want to build all different kinds of telescopes to see the entire spectrum of electromagnetic radiation. For almost the entire history of astronomy, we viewed the Universe through an electromagnetic window. On February 11th, 2016, the Laser Interferometer Gravitational-Wave Observatory (LIGO) collaboration announced the detection of gravitational waves from a black hole binary.

Black hole image released by Event Horizon Telescope team in world first - Science News - ABC News Scientists have glimpsed the event horizon of a black hole for the very first time. Key points black hole Key points: The world-first image shows the supermassive black hole at the centre of M87, a neighbouring galaxy to our own Milky WayThe image is the result of a seven-year project linking telescopes all over the world to create 'a dish the size of the planet'The fact the image matches so closely to predictions is a confirmation of Einstein's theory of general relativity Until now, every image of a black hole you have ever seen has been an artist's impression. "We've been studying black holes so long that sometimes it's easy to forget that none of us has actually seen one," said France Cordova, director of the US National Science Foundation, at one of seven simultaneous press conferences where the scientists announced their findings to the world. The first ever image showing the event horizon of a black hole. Supplied: Event Horizon Telescope Achieving the impossible What does it all mean?

Earth's magnetic song recorded for the first time during a solar storm Data from ESA's Cluster mission has provided a recording of the eerie "song" that Earth sings when it is hit by a solar storm. The song comes from waves that are generated in the Earth's magnetic field by the collision of the storm. The storm itself is the eruption of electrically charged particles from the sun's atmosphere. A team led by Lucile Turc, a former ESA research fellow who is now based at the University of Helsinki, Finland, made the discovery after analyzing data from the Cluster Science Archive. Cluster consists of four spacecraft that orbit Earth in formation, investigating our planet's magnetic environment and its interaction with the solar wind—a constant flow of particles released by the sun into the Solar System. As part of their orbits, the Cluster spacecraft repeatedly fly through the foreshock, which is the first region that particles encounter when a solar storm hits our planet. "It's like the storm is changing the tuning of the foreshock," explains Lucile.

Related: