In the book “Frontiers II” Janet and Isaac Asimov considered scientific theories with regard to unimaginable phenomena in cosmology (cf. pages 300-320.) The authors describe star formation, two types of supernovas, a method of measuring distances in space, star clusters, our galaxy’s neighbors, universe formation and dark matter concept.
J. and I. Asimov imply that it is rather difficult to construct a sufficient theory on stars formation without an opportunity to look at the process. They referred to Colin Aspin’ and his colleagues’ research, which concerned a discovery of a young star. The abovementioned scientists stated that the discovered star is probably undergoing the very formation. The Asimovs present a kind of generalization for a complicated process, which can be understood by a tyro in cosmology.
The authors tell about a star since its formation and until the very twilight of its life. Supernova’ related theories are also presented in the book. The Asimovs discuss Supernova I and Supernova II and emphasize that the second type can be a cause for a black hole appearance, while the first one is able to initiate new solar systems’ creation.
The authors present a famous theory which helps to evaluate distances in the space. They consider a hot question about galaxies’ expansion, the methods to estimate its velocity. The Authors have uninitiated readers been explained “watch in the past” theory. They remind that it sometimes takes the light billion of years to reach us.
The authors claim that stars and galaxies are not alone. It can happen so, that about thousands and thousands of stars share the same area of space. The Asimovs tell the readers about similar examples with regard to our own galaxy. Milky Way is a part of a galaxy cluster, which is called “Local Group”.
The Asimoves reveal our universe formation’s process, its shape and forces that could greatly influence its form. The authors introduce the dark matter concept, which is the most reliable for the universe’s shape explanation. They state that scientists do not know too much about the dark matter to apply its properties more successfully to explain universe’s formation and present shape.
Adopted from: Aimov, I. & J. (1993). Frontiers II (pages 300-320.)
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3 comments:
Hi Evghenii
I found your summary very ineresting as Houman's one as well. I would like to know more about cosmos, galaxies, stars and black holes.
I have a lot of questions about stars and everything that related to them. I glad that we have a classmate who is interested in astronomy.
Heyy Evgeniy..
Your summary was really interesting to me but the problem is I didn't understand it all cause I didn't read anything about the milky way before yes I know what does it mean and it's contents like the stars,black holes etc but I didn't get to the core of the subject I will have to read about it and you know what I will try my best to do that and I hope that your summaries will help me to understand more..
thx
hi evghenii!!!!im alejandro!!
oh man!!! your summary is really interesting!!! i do not know much about stars formation, but now i have a little of knowledge about that topic thx to you. i found really interesting that the stars have a period of life, i never imagined before that a star has to born and die as well. another point that really surprised me was the fact that there is stars bigger than our sun. Super novas star also were interesnting,now im know that any stars, includind our sun, could explot into several years, and also that these kind of explotion coul cause black holes due of its density and gravitatory force.
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