| Piú votate - The Universe Inside |
Moon River.jpgThe Moon over St. Lawrence River116 visiteDa "NASA - Picture of the Day" del 9 Settembre 2005:"Shortly after sunset on September 6th, sky gazers around the world were treated to a lovely crescent Moon in western skies - joined by bright planets Venus and Jupiter.
In this colorful telephoto view from near Quebec City, Canada, the Moon is nestled just above the wide St. Lawrence River. Lights on the horizon are along the river's southern shore. Also known as the evening star, Venus is at the upper left and Jupiter at the upper right, while another prominent celestial beacon, Spica, can be seen shining through the twilight below Venus.
Spica, actually a very close pair of hot blue stars some 260 LY away, is the brightest star in the constellation Virgo".
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Afterlight.jpgAfterlight (by Dr Gianluigi Barca)121 visitenessun commentoMareKromium
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Colourful_Earth.jpgEarth, from Monochrome to Polychrome (by Roberto Tremolada)55 visitenessun commentoMareKromium
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Beyond.jpgBeyond... (by Roberto Tremolada)70 visitenessun commentoMareKromium
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Voyagers-01.gifTowards the "Terra Incognita" (2)59 visiteIt is appropriate to consider the VIM as three distinct phases: the termination shock, heliosheath exploration, and interstellar exploration phases. The two Voyager spacecraft began the VIM operating, and are still operating, in an environment controlled by the Sun's magnetic field with the plasma particles being dominated by those contained in the expanding supersonic solar wind. This is the characteristic environment of the termination shock phase. At some distance from the Sun, the supersonic solar wind will be held back from further expansion by the interstellar wind. The first feature to be encountered by a spacecraft as a result of this interstellar wind/solar wind interaction will be the termination shock where the solar wind slows from supersonic to subsonic speed and large changes in plasma flow direction and magnetic field orientation occur.
Passage through the Termination Shock ends the Termination Shock Phase (TSP) and begins the Heliosheath Exploration Phase (HEP). Voyager 1 in 2004 completed the TSP of the mission when the spacecraft was 94 AU from the Sun. After passage through the Termination Shock, the spacecraft will be operating in the Heliosheath environment which is still dominated by the Sun's Magnetic Field and particles contained in the Solar Wind. The HEP ends with passage through the Heliopause which is the outer extent of the Sun's Magnetic Field and Solar Wind. The thickness of the Heliosheath is uncertain and could be tens of AU thick taking several years to traverse. Passage through the Heliopause begins the Interstellar Exploration Phase (IEP) with the spacecraft operating in an interstellar wind dominated environment. This interstellar exploration is the ultimate goal of the Voyager Interstellar Mission.MareKromium
(15 voti)
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CloudsandStars.jpgIn the twilights...57 visitenessun commentoMareKromium
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SPACEVISION-P-019-05703.jpgSpace-Vision59 visite
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Perseid-2.jpgShooting Star (2) - detail mgnf63 visiteOsservate questo ingrandimento della Perseide immortalata dal nostro Amico Jimmy Westlake e poi provate a riguardare il (presunto) bolide che Cassini potrebbe aver fotografato nello Spazio di Saturno: noterete con semplicità che le caratteristiche delle due "strisciate di luce" (streaks) sono MOLTO simili.
Peccato che la NASA si affanni a dare credito solo ad alcuni personaggi e ad alcune (sempre più discutibili o insulse) "scoperte" (come il presunto colorito "rosato" di Iperione), senza mai prendere atto che anche in Italia esistono Ricercatori attenti e competenti i quali, di tanto in tanto, sono i primi a notare l'esistenza di qualcosa di veramente raro...
Peccato.
(15 voti)
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Tomorrow.jpgTomorrow never dies...66 visitenessun commento
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ALANBEAN-PRAYER.jpgLunar Prayer170 visitenessun commento
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ALANBEAN-CORETUBE.jpgCore-Tube109 visiteDalla Galleria Pittorica dell'Astronauta Alan Laverne Bean: un Omaggio alla Luna ed a quei pochi che ebbero il coraggio, la fortuna ed il privilegio di camminarci sopra.
Ma lasciamo che sia "Alan" a raccontarci questa storia: la "Sua Storia"...
"...When my book, "Apollo, An Eyewitness Account", was published in October of 1998, I felt an overall sense of satisfaction. I was, in fact, preserving some of my special memories of the Apollo Program. This was the reason I resigned from NASA to become an artist.
I was moving right along but I noticed my goals for the future were even more ambitious. I wanted to paint the Moon more beautifully than I had done so far, as colorful as it could be painted, and still look like the Moon to me, a worthy but elusive goal.
I stopped painting commissions and began painting several series of studies to explore and develop new color techniques and combinations. This intense and dedicated effort consumed me for the better part of a year with the resulting changes first coming to full fruition in this painting.
Sometimes when I look at this painting I wonder if the changes were all that much. I question if anyone other than me can see them or even care? I don't know. Was it worth the time? I hope so...".
(15 voti)
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Aurora_Borealis-Coronal_Aurora-sep11aurora_moussette_f.jpgNorthern Lights over Canada60 visiteSo far, the Aurora Borealis - or "Northern Lights" - have made some remarkable visits to September's Skies. The reason, of course, is the not-so-quiet Sun. In particular, a large solar active region now crossing the Sun's disk has produced multiple, intense flares and a large Coronal Mass Ejection (CME) that triggered wide spread auroral activity just last weekend. This colorful example of spectacular curtains of aurora was captured with a fish-eye lens in skies over Quebec, Canada, on September 11, 2005.
Also featured is the planet Mars, the brightest object above and left center. Seen near Mars (just below and to the right) is the tightly knit Pleiades star cluster.
Although they can appear to be quite close, the Northern Lights actually originate at extreme altitudes, 100 Km or so above the Earth's surface.
(15 voti)
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