| Piú votate - SOLAR SYSTEM |
South Polar Spring-PIA08660.jpgSpring at the South Pole of Mars71 visiteSand-laden jets shoot into the Polar Sky in this view by noted space artist Ron Miller. It shows the Martian South Polar "Ice Cap" as Southern Spring begins.
(13 voti)
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Voyagers-Heliosphere5b.JPGThe Voyagers at the "Final Frontier"88 visiteThe twin Voyager 1 and 2 spacecrafts continue exploring where nothing from Earth has flown before. In the 25th year after their 1977 launches, they each are much farther away from Earth and the Sun than Pluto is and approaching the boundary region - the heliopause - where the Sun's dominance of the environment ends and Interstellar Space begins. Voyager 1, more than twice as distant as Pluto, is farther from Earth than any other human-made object and speeding outward at more than 17 Km per second (38.000 miles per hour). Both spacecraft are still sending scientific information about their surroundings through the Deep Space Network (DSN).
The primary mission was the exploration of Jupiter and Saturn.
After making a string of discoveries there - such as active volcanoes on Jupiter's moon Io and intricacies of Saturn's rings - the mission was extended. Voyager 2 went on to explore Uranus and Neptune, and is still the only spacecraft to have visited those outer Planets. The adventurers' current mission, the Voyager Interstellar Mission (VIM), will explore the outermost edge of the Sun's domain. And beyond.
(13 voti)
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WW31.jpg1998-WW3186 visiteThis is an artist's view of a Kuiper Belt binary object, called 1998 WW31. These icy bodies orbit each other at the fringe of our Solar System.
The illustration depicts one member of the duo in the foreground; its companion - the dark, round object - is in the background. The objects are about the same size. Both are illuminated from behind by the Sun [the white dot at upper left]. Like other Kuiper Belt objects, this duo orbits the Sun, completing a circuit every 301 years while Pluto orbits the Sun every 248 years.
(13 voti)
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ZN-The Moons of Pluto.jpgNew "moons" for Pluto? Early news88 visiteDunque il Sistema (Binario) Plutone-Caronte starebbe per diventare (o forse è già ufficiosamente diventato) un Sistema Quaternario il quale fa, letteralmente, a pugni con le nostre stra-consolidate idee e speculazioni sull'origine e le caratteristiche di Plutone e dei piccoli Corpi Celesti trans-Nettuniani.
Un plauso al Sito "Multidimensione", sul quale abbiamo rintracciato la notizia in prima battuta, e complimenti allo "Chef" (che presumiamo essere il Web-Master).
(13 voti)
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AA-Neptune-CJH.jpgSmiling Neptune and soft, white, water-clouds - from Voyager 2 (HR)74 visiteUn'immagine davvero meravigliosa, ottenuta dalla Sonda Voyager 2, durante il suo rapido passaggio accanto all'ultimo Gigante Gassoso del nostro Sistema Solare. Era il 31 Agosto 1989...
(13 voti)
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Image045-Ukert.jpgUkert: the "pseudo-triangular" Lunar Crater261 visitePiccola interruzione alla prolusione del Dr Feltri: anche Richard Hoagland e Mike Bara si sono dati da fare per (tentare) di "interpretare" il Cratere Ukert e questo è un frammento delle loro elucubrazioni (come sempre basate sulla fisica iperdimensionale e sulla costante ricerca di simmetrie anche laddove non ve n'é traccia alcuna...):
"...Ukert's equilateral message is notably significant to us.
It is this precise 2-dimensional image of a 3-dimensional tetrahedron at Ukert that Hoagland decoded in, and related to, the mathematical relationships seen at Cydonia on Mars. It also reflects the singular symbology of "Hyper Dimensional Physics"...".
Chiacchiere e jargon, secondo noi. Torniamo al Dr Feltri quindi...
(13 voti)
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Jupiter-HR.jpgJupiter's North Pole (HR)68 visiteDa "NASA - Picture of the Day" dell'11-09-2005:"Gas giant Jupiter is the Solar System's largest world with about 320 times the mass of Earth. Famous for its Great Red Spot, Jupiter is also known for its regular, equatorial cloud bands, also visible in very modest sized telescopes.
The dark belts and light-colored zones of Jupiter's cloud bands are organized by the Planet's girdling winds which reach speeds of up to 500 Km/hour. On toward the Jovian poles though, the cloud structures become more mottled and convoluted until, as in this Cassini spacecraft mosaic of Jupiter, the Planet's Polar Region begins to look something like a brain. This striking equator-to-pole change in cloud patterns is not presently understood, but may be due in part to the effect of Jupiter's rapid rotation or to convection vortices generated at high latitudes by the massive Planet's internal heat loss.
Cassini took this dramatically detailed view of Jupiter in December 2000, during its flyby enroute to Saturn".
(13 voti)
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Gusev Crater.jpgGusev Crater: an artistic interpretation140 visite"...The landing site and the Columbia Hills are within Gusev Crater, a bowl about 150 Km (about 95 miles) in diameter. It was selected for the Spirit mission because the shape of the terrain suggests the crater once held a lake. Volcanic deposits appear to have covered any sign of ancient lakebed geology out on the plain, but scientists say the hills expose older layers that have been lifted and tipped by a meteorite impact or other event...".
"Spirit has climbed to the hilltop and looked over the other side, but NASA did not do this just to say we can do it. The Mars rovers are addressing fundamental questions about Martian history and planetary environments," said NASA's Mars Exploration Program Director Doug McCuistion.
The crest of "Husband Hill" offers Spirit's views of possible routes into a basin to the south with apparently layered outcrops. Shortly after Spirit landed, it observed a cluster of seven hills about 3 kilometers (2 miles) east of its landing site. NASA proposed naming the range "Columbia Hills" in tribute to the last crew of Space Shuttle Columbia. The tallest of the hills commemorates Rick Husband, Columbia's commander.
(13 voti)
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Rhea-PV-PIA07566.jpgRhea, from about 239.000 Km64 visiteOriginal caption:"Like the rest of Rhea's surface, the Southern Polar Region of this Saturn moon has been extensively re-worked by cratering over the eons. This close-up shows that most sizeable craters have smaller, younger impact sites within them. Near the left lies an intriguing gash (---> taglio lungo e profondo, ivi sinonimo di "chasm" o "cleft").
The largest well-defined crater visible here is an oval-shaped impact toward the upper right. The crater is 115 by 91 Km (such as 71 by 57 miles) in size. Cassini acquired this view during a distant flyby of Rhea on July 14, 2005.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera at a distance of approx. 239.000 Km (such as 149.000 miles) from Rhea and at a Sun-Rhea-spacecraft angle of 56°. The image was obtained using a filter sensitive to wavelengths of infrared light centered at 930 nnmts. The image scale is about 1 Km per pixel".
(13 voti)
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mars-dust-devil-large-bg.jpgMartian Dust Devil122 visiteAh, Martian Summer! Finally, the days are long, just like on dear old Earth. And daytime highs rocket all the way up to a balmy 20°C (68°F) from the Summer nighttime low of -90°C (-130°F), meaning you and your fellow astronauts can warm up your machinery earlier to get a good start on mining operations.
But those warm daytime temperatures also bring alive the Martian devils. Dust devils, that is.
You were caught in one just yesterday - and a devilishly terrifying experience it was! This was no little Arizona desert whirlwind, only a few tens of meters high and a few meters across and past you in seconds.
No, what hit you yesterday was a monster column towering kilometers high and hundreds of meters wide, 10 times larger than any tornado on Earth. Red-brown sand and dust whipping around faster than 30 meters per second (70 miles per hour) dropped visibility to zero, scouring your faceplate, driving dust into every fold and wrinkle of your spacesuit.
For 15 minutes you huddled and endured the buffeting. The scariest part was the incessant crackling and flashing of miniature lightning bolts nipping at you and your rover, and the loud static on your radio that prevented you from calling for help.
Could this really happen?
(13 voti)
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Image037-54-10075567_C.jpgBlue Flares and the Invisible Crater: Cone Crater (detail mgnf)259 visiteSemmai la questione si complica per la presenza di strane caratteristiche geomorfologiche nella parte Nord-Ovest e di una curiosa "rampa" che si intravede nell'area meridionale del Cratere e che non era visibile neppure nelle altre fotografie planimetriche.
La cosa comunque non deve avere sconvolto gli Astronauti, visto che non l'hanno né descritta, né fotografata in alcuna circostanza (anche se la scelta per l'allunaggio in quest'area nella zona settentrionale di Fra Mauro non deve essere stata proprio accidentale...).
(13 voti)
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Miranda-PIA02217.jpgMiranda86 visiteCaption NASA originale:"Mosaic of HR images of Miranda. One wide-angle and eight narrow-angle camera images of Miranda were combined in this view. The controlled mosaic was transformed to an orthographic view centered on the South Pole. The trapezoidal region (about 200 Km on a side) occurs near the South Pole and is located near the center of the mosaic. The trapezoid's outer boundary and its internal patterns of ridges and band of contrasting albedo display numerous sharp corners".
(13 voti)
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