For example, it's existence, such as dark energy and dark matter that human beings can not be found yet. It is expected that mass and energy of all substances that we know is less than 5% of the total energy and the total mass of the universe. something 95% of the remaining should exist in theory, but they're still unidentified.
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| Data of Wow! Signal. |
Sometimes scientists happen to encounter a mysterious phenomenon during the study. Wow! Signal is one of such phenomena. August 15 1977 when Jerry R. Ehman had been observing the SETI project, he observed a strong signal concentrated in a narrow frequency. It represents well the characteristics of the signal for use in interstellar communication that is expected by astronomer. Ehman was surprised in this. He print out the data of this signal, and he wrote a "Wow!" on it. There are many people who expected that this is a signal from an alien. But the identity of this signal has not yet been elucidated.
Some celestial body emits a pulse too regular. It was hard to think that it is a thing of the natural world by people. So, it has been considered to be a signal from space. Now, it has been found that celestial body, pulsar neutron star. When neutron stars rotate at a high speed, radiant energy of it is directed to the earth periodically. In other words, it's like a lighthouse floating in space.
There are other strange star. Mira is located in the Cetus is a famous star. Because this star is changing the brightness of its own greatly. It will be the star of the tenth magnitude from the star of the second magnitude. Why its brightness change? Because this star shrink and bulge periodically. The period's approximately 332 days. It is very interesting for you to observe this star.
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| Growth of the Universe. |
How the universe birth is the biggest mystery of the universe. Scientists know that the Big Bang happened first. In before, what is there? Why explosion happened? There would have been nothing there. There was no space there. And there was no time. But the universe was born from nothingness. How do we think of this? It is too difficult problem for us now.
And how the universe end? Scientists know this answer probably. Universe puffy now. This bulge forever, star and star will no longer encounter. The universe will go dark again.
It was a lonely story last, but I think very interesting story is in many cases.
The sources:
http://en.wikipedia.org/wiki/Ultimate_fate_of_the_universe
http://news.livedoor.com/article/detail/4148262/
The pictures:
http://upload.wikimedia.org/wikipedia/commons/thumb/d/d3/Wow_signal.jpg/640px-Wow_signal.jpg
http://upload.wikimedia.org/wikipedia/commons/b/b4/Universe_expansion.png
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