Tuesday, June 29, 2010
On stellar cosmos
I like to look up at the starry night sky. The faint flickering light of stars I see now was emitted billions of light years ago; it's awesome! The mystery of the cosmos has been unveiled little by little with the progress of science. Now people know universe is not a dark and empty nothingness as people had perceived it to be but living organic extension of stars and planets. The pictures taken by the Hubble Space Telescope stimulate my imagination with their spectacular and mysterious images, even if they are colored by computer graphics. The picture above is "The Cat's Eye Nebula" by HST. (HUBBLESITE) The picture below is our mother Earth seen from Appolo 17 and is known as "Blue Marble".
Every star exists and every planet travels in the universe according to the Law of Universe. However, there are many man-made satellites placed in the orbit. Some are already defunct: now they exist just as space junk and are falling down to the Earth one by one. The purpose of the artificial satellites is varied ranging from weather forecast, global positioning, spy or military use, and so on. Some satellites are powered by nuclear. I feel chilled, and wonder how the space security is.
The return of space probe Hayabusa (about which I wrote on June 15th ) has proved effectiveness of various new technology, ion engines as the power to move a space probe far and long, automatic control technology, and others. I hope these will be developed to be useful for usual life of future generation, not only in space exploration. Some people think Japan has gotten technology to develop missiles that can pinpoint the target, seeing from the pin-point landing of HAYABUSA's capsule in Australian desert. After all, what is the difference between a rocket and a missile? When a warhead is attached to a rocket, it is a ballistic missile. When accurate pinpoint targeting device is added, it is a smart devastating missile. I hope that technology will never be utilized by vicious people.
I see both humans' dazzling capacities and equally dazzling incapacities. Our lives have gotten happier and more convenient but at the same time more miserable and more dangerous. What is the meaning of the emergence of a human being as a rational creature on the Earth?