3. About the Solar System

    This time, I will talk about the solar system. What's there in the solar system? Solar system is made up from the celestial body orbiting around the sun. Celestial body are on the same disk basically. I think I will try to explain from the inside.

The Solar System.

    The sun is stellar. In other words it is that it's celestial body which emits light by itself. Some of the same system, there's no such thing as the other. Its size is also exceptional. The volume of the sun is about 1.3 million times that of the Earth. It is the terrestrial planets from the next. They are made from roughly rock.

    Mercury is the smallest planet in the solar system. Pluto is smaller, but it has become the dwarf planet rather than a planet. Mercury is too close to the sun, so observation of it is difficult. This is the planet that we do not know yet in many cases.

    Venus is the planet that is most similar to Earth. There is air in this planet, and the orbit is also quite close to the earth. But the direction of the rotation is the opposite. The sun sinks to the east on the rise in the west in Venus. Astronomers do not know well the reason. By the way Venus has been known as the first star. Everyone would have the eye once.

    So far, Earth is the only planet organisms are present in the solar system. There is no doubt that it is rare in the universe this. Because we have not seen an alien yet.

Mars.

    Fourth is Mars. Its surface is covered in iron oxide, this planet is red as the name. This is the location of choice as to which scholars we will send the spacecraft. Maybe there was a water like Earth this planet a long time ago. There might have been some biological. There is the asteroid belt after the Mars. It is a Jupiter -type planets from the next. It is made of gas mainly, these are huge.

    Jupiter is the largest planet in the solar system. As well as the combined weight of all the other planets, Jupiter will have a weight of more than double that. We can see only the surface of the cloud. This planet is well known for that there is a vortex called the Great Red Spot. This is found to be a super- huge storm. But why is this will not disappear? I wonder.

Saturn.

    Saturn is the planet with a beautiful ring. This ring is made of rock and ice. This planet is also made ​​of gas again. This star has a satellite countless. Titan is the largest satellite will even have air in it. You may also have a microbial component of the sea and the earth as they are quite similar liquid component of Enceladus. 
     
    Neptune and Uranus is a planet made ​​of gas and ice. They have a uniform structure as remove the core from the planet of Jupiter type. It is a very cold place because these are too far away from the sun. Uranus is a celestial body with a thin blue-green. It has in its side rotation oddly. Neptune is a celestial body with a deep blue. Strong wind is blowing here, big storm called the great dark spot was observed by Voyager 2, but it was gone in a few years. There is no planet later than this.

    Pluto is a dwarf planet. Include Ellis, Makemake, Haumea is the other celestial body called Plutonian objects. According to the definition of a planet, that it goes round the sun, that it is almost completely spherical, that it is to wipe out the bodies nearby. Planet to meet these three. Dwarf planet to meet only two.

    On the outside, scattering disk and astrophotography Kuiper belt objects were scattered around the myriad further. It is thought the place farthest from the sun, and there are countless small bodies in spherical you around the sun.

    There is a lot of mystery still in the solar system. Really, it does not fit on the page I just talk about the one planet. Could you know what's in the solar system?

The sources: 
http://en.wikipedia.org/wiki/Solar_System
http://omgspace.net/

The pictures:
http://upload.wikimedia.org/wikipedia/commons/c/c3/Solar_sys8.jpg
http://nssdc.gsfc.nasa.gov/image/planetary/mars/hst_mars060.jpg
http://photojournal.jpl.nasa.gov/jpegMod/PIA05389_modest.jpg

2. Progress of Astronomy

    I talk about the remarkable development of this study. What do people would have studied in astronomy state-of-the-art? Since it is very diverse, it is possible to introduce all difficult.

Neptune.

    Newtonian physics since been established, people understood that the earth around it around the sun. Because they knew that the planet like Jupiter is a movement different from other stars, I noticed that the planets around the sun around. March 13, 1781, William Herschel discovered Uranus in the telescope. Motion of the planet was strange. Scientists knew that the orbit of the planet is not a perfect circle, but even so the orbit of this planet was disturbed unnatural. Scientists expect another planet is lacking the power to this planet from the outside. And they calculated the orbit of an unknown planet. Result, astronomers have found Neptune. This star is the first planet whose existence was revealed by calculation.
 
    There is a learning called spectroscopy. By analyzing the spectrum of light, this study can predict the properties of the light source. This is established in the mid-19th century, scientists began to allow observation of the stars in more detail.They were able to predict that the star is that whether they contain any element. Speed ​​of a star could also be predicted from the Doppler effect of light they.

Radio telescope, ALMA.

    19th century, photography was invented. Astronomers looked faint stars invisible to the human by using the photograph.They began to observe the galaxy and nebula in earnest. In addition, in 1931, Karl Jansky found that celestial body is emitting radio waves. He was a physicist cruncher wireless technology. His discovery, made ​​a study of radio astronomy. Certain radio has the property of passing through the obstacle or reaches farther than the light. This property was convenient to observe celestial bodies invisible disturb the nebula celestial bodies and not the emitted light. In this way, observation target people began increasing.

Albert Einstein.

     From modern, astronomy was the quest for knowledge. That the new discovery will lead to the discovery of the next there were many. There was also a theory until it is overturned. For example, inadequacies of Newtonian mechanics is modified by Einstein's theory of relativity. Unfortunately, this theory of Einstein is famous but difficult, most people may not understand. We found that the time and space that distorted the time being. For curiosity not for life, scientists wanted to know the mechanism of the universe. In fact , bodies far away even if what sort would be little that it is involved in our lives. But so it 's good. Because it was something interesting for scientists.




The sources: 
http://en.wikipedia.org/wiki/History_of_astronomy
http://gigazine.net/news/20110817_astoronomy_discoveries/

The pictures:
 http://photojournal.jpl.nasa.gov/jpegMod/PIA00046_modest.jpg
http://alma.mtk.nao.ac.jp/j/multimedia/files/editor/2013_alma_0001.jpg

1. Beginning of Astronomy

I like astronomy.

    Hello. Do you like stars? Are you interested in the universe? I think I would like to talk about astronomy in this blog.

Pyramid of Mayan

    The first topic is the beginning of astronomy. Its history began in BC. Why did ancient people tried to study astronomy? Scholars believe astronomy began with that people make the calendar. First , lunar calendar is used. But it did not represent the one year exactly. Then solar calendar came into use. At the time, it was important that to study in order to make a more accurate calendar. In fact, from the ancient ruins of many, such as the pyramid of the Mayan civilization in Mexico and Stonehenge in England and the pyramids of Egypt, evidence that ancient people had the astronomical knowledge have been found. But astronomy at that time were not clearly separated from astrology. Therefore, it contained between occult element while for that. There is a geocentric theory as an example of the concept non-scientific. Astronomer excellent cast heliocentric theory was present from BC in Egypt and ancient Greece, but there were few at that time that their opinions can be seen unfortunately.

Galileo's telescope

    16 century, from the Renaissance period, astronomy began to progress scientifically in Europe. 17th century, the invention of telescope quickened its progress. It has allowed the researchers that collect a large amount of observational data that can be trusted. Observation technology was so immature Until then, scholars have even figured out the correct theory, they failed to pｒove it. Galileo Galilei is a pioneer of the scientific method, he contributed to the development of various fields is not limited to astronomy. To derive the laws of Kepler, Johannes Kepler explained the motion of the planet to the sun. Universal gravitation was proposed by Isaac Newton at the same time played an important role in this law. People believed the Ptolemaic system still at this time. But we do not have a misunderstanding. People of that era was not stupid. At the time, heliocentric theory was not more accurate than the Ptolemaic theory immature. So they did not know is that the theory that their religion is wrong. Kepler's laws is right pretty . So 18th and 19th centuries, scientists were able to prove on the basis of the theory and excellent observation technology that advanced the heliocentric theory. People eliminate the theory unscientific in this manner, Astronomy, leading to the modern finally been established.

    Able to turn over what it was previously believed to be common sense is very difficult. But when Copernican turn occurs, people had to be taken to it. After this, astronomy more developed, it began to more observation target. Astronomers finished the exact calendar making, They entered the next phase. I want to talk about at the next modern astronomy.

 The sources:

http://en.wikipedia.org/wiki/History_of_astronomy

http://rikanet2.jst.go.jp/contents/cp0320a/contents/rekishi/