منابع مشابه
Meteor stream activity V. The Quadrantids, a very young stream
This paper presents the first large set of precisely reduced orbits of Quadrantid meteoroids. These orbits were obtained from photographic observations during the 1995 return of the Quadrantid stream. The orbits refer to the main peak of the activity curve, with an unidentified few being part of a broad background component. The measured dispersion of orbits is less than from previous data obta...
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We describe a case of a 65-year old man diagnosed with retinal vasoproliferative tumour secondary to posterior uveitis. The fluorescein angiography shows an interesting meteor-like leak emanating from the tumour and rising towards the superior retina in the later frames of the angiogram. Pictorially, we call it the "Retinal Meteor" and also describe the possible mechanism for this pattern of le...
متن کاملMeteor velocities
Introduction Conclusions References Tables Figures Back Close Abstract Introduction Conclusions References Tables Figures Back Close Abstract Determining the velocity of meteoroids as they enter the Earth's atmosphere is very important since the value is fundamental in calculating the orbit of the meteoroid and hence eventually its origin. We describe early attempts at this determination and hi...
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Strange sounds, heard simultaneously with the sighting of brilliant meteor fireballs many tens of kilometers distant, have been an enigma for more than two centuries. The term "electrophonic sounds" is now widely used to describe them and distinguish them from the normal sonic effects heard after the fireball has passed by. A physically viable explanation for meteor fireball electrophonic sound...
متن کاملMeteor Crater, Arizona
The location of Meteor Crater is shown on nearly all highway maps of Arizona. It lies 6 mi (9.7 km) south of 1-40 between Flagstaff and Winslow in northern Arizona; the turnoff from 1-40, 34 mi (55 km) east of Flagstaff, is well marked by signs along the highway. Access to the crater is by a paved road that leads directly to a visitor center and museum on the rim of the crater. Qualified scient...
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ژورنال
عنوان ژورنال: Science
سال: 1881
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.os-2.76.578