The presented material is clearly organized. Its structure greatly helps to comprehend the most sophisticated ideas. A term of cosmic rays is introduced so naturally that the complicated phenomenon can be easily understood (p. 154.) A mixture of scientific explanations and specific examples makes the book a useful source for a reader, whose intention is general concepts’ comprehension without deep mathematical analyses.
Authors’ style of writing deserves admiration. Both the language and descriptions are unique. Definitions are clear to the highest extent. It can be supposed that the authors are able to define almost every phenomenon of modern physics as easily as they do with regard to Earth–grazers.
Small asteroids that come comparatively near Earth are called “Earth-grazers” (p. 164.)
Sunday, December 2, 2007
"Frontiers II" by Janet & Isaac Asimov. Summary 4.
In the book “Frontiers II” (Truman Talley Books/Plume, 1993) by Janet and Isaac Asimov the authors describe potential dangers that are hidden in deep space and can considerably influence the Earth or crush it at once. The Asimovs explain the nature of cosmic rays and describe various kinds of meteors from an ice planet to a meteoroid, which is only several feet in size (cf. page 154-174.)
The authors introduce the definition of cosmic rays, stating that they are charged to the unimaginable extent energetic particles, which sources are supernovas’ explosions or black holes’ activity. The Asimovs clarify that the particles cross huge distances in interstellar space, preserving its high energy’s values and cutting almost everything on their way. The Asimovs add that our planet is constantly bombarded by these particles and the Earth’s atmosphere is the only hindrance, which makes the rays weaker and prevent them from making life creatures dead.
The authors represent a conjecture, which probably explains Uranus’ and Triton’s orbits abnormalities. They state that enormously-sized objects in comparison with ordinary planets are attracted from outer space. The authors underline that the objects are called Ice Planets; moreover, the Asimovs conclude that the abovementioned orbits’ abnormalities are results of the collision with Ice Planets.
The authors present a potential danger, which concerns various kinds of meteors and their interactions with the Earth. The Asimovs emphasize that a meteoroid, which is only ten kilometers in diameter, is able to cause fatal damage to our planet.
A. Asimov stresses the fact that it would be essential for humans to create a kind of “Space Watch” (A. & J. Asimov, 1993, Frontiers II page 166.) A. Asimov notes that he had been advocating this idea for thirty years. The author claims that the satellite will help to detect meteors, which can be considered dangerous for the Earth.
The Authors introduce an idea of using the nearest meteors as an extra source of various resources. They stress the fact that the resources on Earth are limited.
Adopted from: Asimov, I. & J. (Truman Talley Books/Plume, 1993), Frontiers II (pages 154-174)
The authors introduce the definition of cosmic rays, stating that they are charged to the unimaginable extent energetic particles, which sources are supernovas’ explosions or black holes’ activity. The Asimovs clarify that the particles cross huge distances in interstellar space, preserving its high energy’s values and cutting almost everything on their way. The Asimovs add that our planet is constantly bombarded by these particles and the Earth’s atmosphere is the only hindrance, which makes the rays weaker and prevent them from making life creatures dead.
The authors represent a conjecture, which probably explains Uranus’ and Triton’s orbits abnormalities. They state that enormously-sized objects in comparison with ordinary planets are attracted from outer space. The authors underline that the objects are called Ice Planets; moreover, the Asimovs conclude that the abovementioned orbits’ abnormalities are results of the collision with Ice Planets.
The authors present a potential danger, which concerns various kinds of meteors and their interactions with the Earth. The Asimovs emphasize that a meteoroid, which is only ten kilometers in diameter, is able to cause fatal damage to our planet.
A. Asimov stresses the fact that it would be essential for humans to create a kind of “Space Watch” (A. & J. Asimov, 1993, Frontiers II page 166.) A. Asimov notes that he had been advocating this idea for thirty years. The author claims that the satellite will help to detect meteors, which can be considered dangerous for the Earth.
The Authors introduce an idea of using the nearest meteors as an extra source of various resources. They stress the fact that the resources on Earth are limited.
Adopted from: Asimov, I. & J. (Truman Talley Books/Plume, 1993), Frontiers II (pages 154-174)
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