Διεγραμμένος Χρήστης

Foto: Γιώργος Πανάγος Meteor Crater is one of the youngest and best-preserved impact craters on Earth. The crater formed roughly 50,000 years ago when a 30-meter-wide, iron-rich meteor weighing 100,000 tons struck the Arizona desert at an estimated 20 kilometers per second. The resulting explosion exceeded the combined force of today's nuclear arsenals and created a 1.1-kilometer-wide, 200-meter-deep crater. Η ΝΑΣΑ πολλές φορές επερνε για εκπέδευση τους Αστροναύτες του προγράμματος Απόλλωνα στον Κρατήρα. Ειδικά στις τελευταιες αποστολές 'οπως Apollo 15 & 16 έκαναν δοκιμή με το σεληνιακό όχημα γύρω απο τον κρατήρα. Σήμερα δοκιμάζουν ομάδες τις ΝΑΣΑ εκπεδέυσεις με Αστροναύτες στον κρατήρα φορώντας τις διαστημικές στολές που έχουν φτιαχτεί για τον Αρη και γενικότερα την καλή προετοιμασία του ανθρώπου έτσι ώστε να μην υπάρξει πρόβλημα στην επειφάνεια άλλων κόσμων Τυχαία τις διαστημικές στολές του Άρη τις καιτασκευάζει ο πατέρας ενός απο τους καθηγητές μου στο Houston ,TX και που ονομάζεται James Cosmo ένας εξέρετος άνθρωπος.

Foto: Γιώργος Πανάγος Το κέντρο του κρατήρα στην Αριζόνα. Η ΝΑΣΑ έχει τοποθετήσει στο κέντρο του ένα αντικείμενο 6 ποδιών ύψους για σύνγριση ανθρώπινου μεγέθους μέσα στον κρατήρα The interior of the crater is first glimpsed from within the visitor center, which has several observation areas equipped with telescopes to study the distant rock walls in more detail. Outside, other viewing areas are connected by short walkways and steps though there is only one trail, 1/3 mile around the rim, and all hiking must be done as part of a guided tour. A path runs all around the edge but this is now disused, because solo, unaccompanied hiking was stopped several years ago; now rim walking is only possible as part of a guided group, along a short path to a second viewpoint a few hundred yards west of the visitor center. The meteor crater seemed smaller than I was expecting, not much larger than other less well known craters like Death Valley's Ubehebe Crater. It has similar distorted strata around the sides, and the colors of the rocks are rather faded and muted; generally reddish-brown, though lighter brown around the top of the rim, which is strewn with large limestone boulders thrown up by the impact. Overall, the scene is impressive but not especially remarkable, in fact the views of other directions, across the vast red prairie to distant mountain ranges including the snowy San Francisco Peaks, are almost as good.

Foto: Γιώργος Πανάγος ,ΑΖ Ελληνας φίλος που ζει στην Αριζόνα και μου έστειλε μεσω e-mail αυτές τις πανέμορφες φωτογραφίες. Ο μετεορικός Κρατήρας της Αριζόνας Geology: The crater was discovered at the end of the nineteenth century by Grove Gilbert, and studies by him and others including Daniel Barringer proved that the crater was formed by impact of a huge metallic meteor, the first and best preserved of (so far) about 150 such craters on Earth to be identified. The main evidence was the large quantities of meteoric nickel-iron rock fragments found in the crater and scattered for several miles around, this being a substance not found naturally in this location. The largest surviving fragment, viewable in the visitor center, weighs 3/4 tons. Current theories place the size of the meteor as 150 feet in diameter, and its weight at 300,000 tons.

Foto: Γιώργος Πανάγος ,ΑΖ Ενας απο τους βράχους που ξεκόλλησε απο τον μετεοτίτη λίγα δευτερόλεπτα πριν απο την σύνγρουση του με την Γή

The Moon (view of Tycho Crater) or (Tycho Brahé) Geological period: Copernician (From -1.1 billions years to present days) Crater's Sise:88x88Km Height: 4800m / 14500ft Height/Wide ratio: 0.0565 The Image was take from the West Dome's Telescope at the George Observatory. Telescope Model: Celestrone 14" Camera Model: Nikon D70 Shutter Speed: 1/100 sec ISO Speed: ISO-200 Date Picture Taken: 09/18/2005 12:04 AM