Planets in the solar system

In our solar system there are nine planets, namely:a. Mercury- It is closest to the sun- It is the smallest planet in the solar system- No water- There are many valleys and craters- The time it takes to circle the sun is about 88 days.
b. Venus- It lies between the planet Mercury and the Earth- It is a brightly lit white planet, looked beautiful, and brilliant- The surface is hilly- Famous as the morning star, morning star, or Morning Star- The time it takes to circle the sun is about 225 days.
c. Earth- It is the only planet that has life- Having one satellite, the moon- When viewed from outer space appears green or blue- The time it takes to circle the sun is about 365.25 days.
d. Mars- It is closest to Earth- The situation is arid, no plants and animals- Having two satellites, namely demos and Phobos- Famous as the red star- The time it takes to circle the sun is about 678 days.
e. Jupiter- It is the largest planet in our solar system- It appears yellowish- Having 13 satellites, which are the largest ganimedes- Time circulation Jupiter 12 years and time to rotate 10 hours.
f. Saturn- Having a flat ring encircling- Having 10 satellites, which are the largest titan- Time circulation Saturn 30 years and time to rotate 10 hours.
g. Uranus- It can not be seen from earth- Always shrouded in a thick cloud, so it is very cold- It has 15 satellites, the largest of which is the smallest named ariel named Miranda- Time circulation Uranus 84 years and time to rotate 10 hours 49 minutes.
h. Neptune- Only can be seen with a telescope- Having two satellites, namely titron and Nereid- Time circulation Neptune 165 years and rotating 15-hour period.
i. Pluto- It is the farthest planet from the sun- Having one satellite, namely Charon- Time circulation Pluto 248 years.

Understanding solar system

The solar system is a composition consisting of the sun as the center and the planets and other heavenly bodies moving around. The sun is the center of the solar system. Sun consisted of glowing gas and very hot.Celestial objects that emit light called a star, while the celestial bodies that reflect light called a planet. Each planet has a gravitational force so that the planet does not move away from or closer to the sun. Planetary orbits or trajectories elliptical or ellipse. It is called the orbit trajectory. The existence of each planet's orbit makes it does not collide with each other. Accompaniment planet called satellites.

liver

The liver is the largest organ located in the abdominal cavity right side, just below the chest cavity. Liver weight of approximately 1 to 1.5 kg. The liver is one of two large glands that produce digestive glands in the form of sap. The liver is divided into two main parts, namely the right and left.Some liver function, among others:a. Antidoteb. Kill germsc. Outlining the red blood cellsd. Store glycogene. Produce substances needed for blood freeze.

Lungs

At the time of breathing, air enters the body through the nose and mouth, then enter through the throat. After going through the throat, the air into the lungs. The ability of the lungs to accommodate different air. The ability of the lungs to accommodate the air called lung capacity. In the lungs, the air is binding process by blood. Blood that managed to tie and then distribute it to the entire body to burning. This process ultimately results in the combustion (CO2) emitted from the body through the lungs, throat and nostrils. At the time that we can feel the breathing lungs work.The lungs are made up of two parts, namely:a. Right lung, consisting of three wattleb. Left lung, consisting of two wattle.Left lung is smaller than the right lung.

Heart

The heart is a muscular organ located in the chest cavity. Rucut shape and size of a fist. It weighs approximately 300 grams. Cardiac function as a blood pumping. The movement of the heart as hands clenching and unclenching. His movements are constantly and never stops. The heart continues to beat for human and animal life. Blood pumped by the heart circulated throughout the body through the arteries. The blood that is in the whole body flowed again into the heart through the veins is called venous.
Heart consists of the heart wall and heart room. Heart wall covering membranes covering the heart, cardiac muscle, and the membrane lining the heart room. The heart consists of four chambers, the right atrium, left atrium, right ventricle, and the left ventricle. Among the booths and foyer are heart valves. Heart valves to prevent blood mixing clean and dirty blood.
Cardiac septum divides the heart cavity into two parts. Blood on the left side of the heart contains a lot of oxygen (O2) and the right side contains carbon dioxide (CO2). Total heartbeat we are not always the same. At rest, our heart rate less than at work or after work. At work our bodies need more oxygen. The heart beats faster as the blood circulated more rapidly throughout the body. Heart rate can be known by pressing the wrist.

Eclipse of the moon and solar eclipse

Lunar eclipse occurs due to the nature of the sun that falls to the moon is blocked by the Earth. Only lunar eclipse occurs when the full moon and the moon goes into the earth's shadow. When the moon does not receive sunlight so we can not see the moon. Currently this kind is called a lunar eclipse.
Because the Earth is much smaller than the sun, the earth's shadow tapered conical core. Area through which the shadow of the earth's core is very dark and is referred to as the umbra. Rather bright shadow called the penumbra. Lunar eclipse approximately 6 hours, but truly the core shadow only 1 hour 40 minutes. When the moon is in the penumbra, the moon looks vaguely. If the moon in the umbra, the moon completely invisible.
Solar eclipse can occur if the position of the sun, moon and earth are in a straight line. So that the sunlight that falls to Earth's surface is blocked by the moon. Solar eclipse occurs at noon. The total solar eclipse lasts approximately 6 minutes.

Understanding Earth's rotation and revolution of the earth

Rotation of the earth on its axis is called rotation. Kala rotation is used for one-time rotation. When the rotation of the earth for 24 hours or a day. Earth rotates very fast, but we can not feel it. Due to the rotation of the earth there was the turn of the day and night. Part of the earth which leads to experiencing daytime sun. Part of the earth to the sun experienced a night. In addition to rotating, the Earth also evolved. Revolution is a rotary motion around the sun. Earth do once the revolution against the sun (when the revolution) for a year or 362 days 6 hours 9 minutes 10 seconds. The influence of the revolution and rotation of the earth is used as the basis for solar calendar, which determined that the first days, 24 hours and 365 days a year. Determination was not exactly the same as the old rotation and revolution of the earth. The change was made on February 29. Years have additional one day was called a leap year, for example in 1200, 1600, 1800, 1988 and 2000 and so on.
Earth also has other movements that precession. This motion caused by the influence of the moon, causing changes in the direction of the axis of rotation of the earth. Precession very long time that is 25,600 years old. Demonstration precession can be seen in the planetarium projector Jakarta. Kala rotation with the same month when the moon on the earth's revolution, which for 29 ½ days.

The movement of celestial bodies

We all know that the planets in the solar system moves around the sun. The planets have orbital trajectory or a fixed and regular in orbit around the sun. So there is no collision between the planets, or the planets to the sun. Planet rotates on its axis. Some planets have satellites. In addition to its own spin on its axis, the satellite also move around its parent planet. Planets and satellites together orbit around the sun.