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PUNTANDO IL TELESCOPIO A CASO FRA LE MERAVIGLIE E I MISTERI DEL COSMO


Dark Universe	The Universe is mostly dark: 96 percent consists of dark energy (about 70%) and dark matter (about 26%). Only about four percent of the Universe— including the stars, planets and us— is made of familiar atomic matter.

Hubble finds Double Einstein Ring	The Hubble Space Telescope has revealed a never-before-seen optical alignment in space: a pair of glowing rings, one nestled inside the other. The odds of seeing such a special alignment are estimated to be 1 in 10,000.

Gaia, il pianeta che vive	Esiste nell'intero Universo un altro pianeta cosi' ricco di tanta viva bellezza? O siamo forse noi i soli e unici testimoni del miracolo della vita?

Astronomers announce the discovery of a fifth planet circling 55 Cancri	The newly discovered planet weighs about 45 times the mass of Earth and may be similar to Saturn in its composition and appearance. The planet is the fourth from 55 Cancri and completes one orbit every 260 days.

Heaviest Stellar Black Hole Discovered in Nearby Galaxy M33	In the binary system M33 X-7, a star about 70 times more massive than the Sun is revolving around a black hole. This black hole is 15.7 times the Sun's mass, a record for black holes created from the collapse of a giant star.

Black Holes	To be "sucked" into a black hole, one has to cross inside the Schwarzschild radius. At this radius, the escape speed is equal to the speed of light, and once light passes through, even it cannot escape.

Dawn Mission to Vesta and Ceres	Dawn Spacecraft successfully launched! Dawn's 4.8-billion-kilometer (3-billion-mile) odyssey includes exploration of asteroid Vesta in 2011 and the dwarf planet Ceres in 2015.

The Asteroid Belt	The Asteroid Belt, which orbits the Sun between Mars and Jupiter, probably contains millions of asteroids ranging widely in size from Ceres(940 km in diameter) to bodies that are less than 1 km across.There are more than 90,000 numbered asteroids.

Astronomers discover that Neptune has a warm south pole	An international team of astronomers has discovered that Neptune's south pole is much hotter than the rest of the planet. The average temperature on Neptune is about minus 200 degrees Celsius.

Spitzer spies the majestic Sombrero Galaxy	Messier 104 is commonly known as the Sombrero galaxy because in visible light it resembles the broad-brimmed Mexican hat.The Sombrero galaxy is located some 28 million light-years away (8.6 million pc).

Cassini's flyby of Iapetus	Images returned from the flyby of Saturn's moon Iapetus show the moon's yin and yang: a white hemisphere resembling snow,and the other as black as tar.

A trip through the Milky Way	The Milky Way is a member of a collection of more than 50 galaxies called the Local Group. Our galaxy is believed to contain four major spiral arms, plus a number of smaller arms.Our Sun is located on a spur of the Orion Arm.

Eris and Dysnomia	Eris, a dwarf planet currently orbiting the Sun at about twice Pluto's distance, has been measured to have about 27 percent more mass than Pluto.

Voyager's encounters with Jupiter	Although astronomers had studied Jupiter from Earth for several centuries, scientists were surprised by many of Voyager 1 and 2's findings: discovery of active volcanism on the satellite Io was probably the greatest surprise.

La sonda Cassini-Huygens ha raggiunto Saturno, il Signore degli Anelli.	Per raggiungere Saturno la sonda, lanciata nell'ottobre del 1997, ha percorso tre miliardi e mezzo di chilometri, per la bellezza di sette anni di viaggio.Ecco le spettacolari foto di Saturno e di due dei suoi satelliti, Phoebe e Titano.

Le PULSAR	Una PULSAR( dall'inglese "PULSAting Radio source" ) è una stella di neutroni che ruota molto velocemente, la cui radiazione elettromagnetica in coni ristretti è osservata come impulsi emessi ad intervalli estremamente regolari.

Supernovas: when a star blows itself apart	Supernovas are one of the most violent events in the universe, and the force of the explosion generates a blinding flash of radiation, as well as shock waves analogous to sonic booms.

Jupiter's Great Red Spot	Jupiter's Red Spot is a vast, long-lived storm, spinning like a cyclone. The GRS (Great Red Spot) rotates in a counter-clockwise direction in Jupiter's southern hemisphere.

When a star dies, its white soul lives on...	A typical White Dwarf is half as massive as the Sun, yet only slightly bigger than the Earth. This makes White Dwarfs one of the densest forms of matter in the Universe.

STAR WoRdS!	A clear, practical, very useful Glossary. Thank you HubbleSite!

Our beautiful Moon	Both the rotation of the Moon and its revolution around Earth take the same time: this is due to an unsymmetrical distribution of mass in the Moon, which allows Earth's gravity to keep one lunar hemisphere permanently turned toward Earth.

A distant Quasar lensed into five images by cluster of galaxies	The NASA/ESA Hubble Space Telescope has captured the first-ever picture of a distant quasar lensed into five images. This is the only case so far in which multiple quasar images are produced by an entire galaxy cluster acting as a gravitational lens.

Lontanissimi, luminosissimi, potentissimi e misteriosi...vi presento i QUASAR!	Si tratta di galassie lontanissime, le piu' lontane a noi note, che emettono una enorme quantita' di energia dalla regione nucleare. Si pensa che questo tipo di oggetti sia alimentato da un gigantesco buco nero situato nel nucleo della galassia.

NASA's Spitzer spots clashing Galaxies	Four galaxies are slamming into each other and kicking up billions of stars in one of the largest cosmic smash-ups ever observed. The clashing galaxies will eventually merge into a single, behemoth galaxy up to 10 times as massive as our own Milky Way.

A breathtaking image of the Tarantula Nebula	The Tarantula Nebula lies in our neighboring galaxy the Large Magellanic Cloud (LMC), and is the largest, most violent star forming region known in the whole Local Group of galaxies.

Chandra analyses the stellar wind emanating from the Binary System Circinus X-1 in the X-ray spectrum	When a normal star like our Sun teams up with a superdense neutron star, gas and dust gets stripped from one, sucked toward the other, and then slammed into one of the densest object in the universe. Then things get wild...

The Veil Nebula: a Veiled Beauty in the sky	NASA's Hubble Space Telescope photographed three magnificent sections of the Veil Nebula — the shattered remains of a supernova that exploded thousands of years ago. The Veil Nebula is located in the constellation of Cygnus, the Swan.

Properties of Black Holes: the Four Laws of Black Hole Physics	When dust and gas fall into a black hole, they can be sucked towards the event horizon so fast that the atoms are ionized and release bright light that escapes without crossing the event horizon.

A closer look at the Sun	The Sun appears to have been active for 4.6 billion years and has enough fuel to go on for another five billion years or so. At the end of its life, after becoming a red giant, it will collapse into a white dwarf, the final end product of a star like ours.

Do we all really come from space?	Life almost undoubtedly began in space, and specifically in the hearts of comets, rather than on Earth: it is what the astrobiologist Chandra Wickramasinghe claims in his new study about the origins of life.