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Extrasolar

The mystery of the Milky Way (Part 1 / 2)

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Un'immagine spettacolare, realizzata dall'astrofotografo Barney Magrath lo scorso 27 Maggio: in alto, le nubi cosmiche di stelle e polveri della Via Lattea, che circondano un luminosissimo Marte. In basso, al di là delle rocce vulcaniche del Mauna Kea, nelle isole Hawaii, una distesa di nuvole, illuminate dal chiarore della Luna ... Fonte: Hawaii Astronomy Art (Giuseppe Nobile)

There are places on Earth where the Milky Way in the night sky, is fragmented into clouds so bright to dimly illuminate the ground around, places where the stars seem closer, almost within reach. Unfortunately for most of us, residents of polluted cities, that extraordinary celestial spectacle is inaccessible and far, far away.

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Why do some extrasolar planets similar to Earth but can not host life

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Rappresentazione artisica di un pianeta di tipo terrestre. Credit: Trent Schindler, National Science Foundation Astronomers hunting for planets orbiting stars similar to our Sun, are increasingly concentrating on finding rocky bodies like Earth in habitable zones (see article), where conditions of temperature and liquid water are sufficiently stable to allow the development of life.

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Hubble discovered a star that is engulfing the planet

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Rappresentazione artistica del pianeta WASP-12b. (Credit: NASA/ESA/G. Bacon) The hottest planet known planet in the Milky Way is doomed to be swallowed by its parent star, according to remarks made by a new instrument of NASA's Hubble Space Telescope, the Cosmic Origins Spectrograph (COS).

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Discovered something "strange" in a distant extrasolar planet

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Immagine artiistica di un pianeta extrasolare parzialmente eclissato dalla sua stella. Fonte: NASA/JPL-Caltech The Space Telescope Spitzer of NASA , has discovered something strange on a planet far away ... missing methane, a common ingredient in many of the planets in our Solar System.

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Hubble discovered in the data of new exoplanets

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Il coronografo e' stato utilizzato per oscurare la luce proveniente dalla stella brillante (nella fotografia si puo' osservare come il disco scuro al centro dell'immagine) e permettere di cercare la pallida emissione del pianeta HR 8799b. Credit: NASA, ESA, and D. Lafrenière A new powerful image analysis technique will allow astronomers to discover extrasolar planets so far remained "hidden" data from NASA archives.

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