tata surya

Sebuah tata surya terdiri dari matahari dan semua benda langit yang berputar mengelilingi matahari itu sendiri. Matahari adalah bintang yang menghasilkan cahaya sendiri. Objek yang disebut bintang-bintang yang mengelilingi planet ini. Sebagian besar planet memiliki orbit satelit sendiri. Dan ada delapan planet yang mengelilingi matahari.

Sebuah planet dapat dibagi menjadi dua kelompok besar dan kecil. Merkurius, Venus, Bumi dan planet mars adalah kelompok planet dalam. ke empat planet ini terbentuk dari bahan kepadatan rata-rata dari empat atau lima kali kerapatan air. Dan ada juga planet luar adalah empat Jupiter, Saturnus, Uranus dan Neptunus jauh lebih besar dari ke empat planet kecil seperti Bumi, mars, merkurius dan venus.

Jari-jari Yupiter lebih dari sebelas kali jari-jari Bumi, dan volume sekitar 1320 kali lebih besar. Jari Saturnus memiliki 60.400 km, hampir 10 kali jari-jari Bumi.Yupiter dan Saturnus memiliki banyak satelit. Uranus memiliki jari-jari yang panjang yaitu sekitar 23.700 km, sedangkan Neptunus mempunyai jati-jari sekitar 22.300 km.

earth

Earth

s the third planet from the Sun. Earth is the largest of the terrestrial planets in the Solar System in diameter, mass and density. It is also referred to as the World and Terra.^{[note 3]}

Home to millions of species,^[11] including humans, Earth is the only place in the universe where life is known to exist. The planet formed 4.54 billion years ago,^{[12][13][14][15]} and life appeared on its surface within a billion years. Since then, Earth's biosphere has significantly altered the atmosphere and other abiotic conditions on the planet, enabling the proliferation of aerobic organisms as well as the formation of the ozone layer which, together with Earth's magnetic field, blocks harmful radiation, permitting life on land.^[16] The physical properties of the Earth, as well as its geological history and orbit, allowed life to persist during this period. The world is expected to continue supporting life for another 1.5 billion years, after which the rising luminosity of the Sun will eliminate the biosphere.^[17]

Earth's outer surface is divided into several rigid segments, or tectonic plates, that gradually migrate across the surface over periods of many millions of years. About 71% of the surface is covered with salt-water oceans, the remainder consisting of continents and islands; liquid water, necessary for all known life, is not known to exist on any other planet's surface.^{[note 4][note 5]} Earth's interior remains active, with a thick layer of relatively solid mantle, a liquid outer core that generates a magnetic field, and a solid iron inner core.

Earth interacts with other objects in outer space, including the Sun and the Moon. At present, Earth orbits the Sun once for every roughly 366.26 times it rotates about its axis. This length of time is a sidereal year, which is equal to 365.26 solar days.^{[note 6]} The Earth's axis of rotation is tilted 23.4° away from the perpendicular to its orbital plane,^[18] producing seasonal variations on the planet's surface with a period of one tropical year (365.24 solar days). Earth's only known natural satellite, the Moon, which began orbiting it about 4.53 billion years ago, provides ocean tides, stabilizes the axial tilt and gradually slows the planet's rotation. Between approximately 4.1 and 3.8 billion years ago, asteroid impacts during the Late Heavy Bombardment caused significant changes to the surface environment.

Both the mineral resources of the planet, as well as the products of the biosphere, contribute resources that are used to support a global human population. The inhabitants are grouped into about 200 independent sovereign states, which interact through diplomacy, travel, trade and military action. Human cultures have developed many views of the planet, including personification as a deity, a belief in a flat Earth, and a modern perspective of the world as an integrated environment that requires stewardship.

consequences of global warming

global warming is the increasing occurrence of temperature average of the atmosphere, sea and land Earth.

Since known about climate science, scientists have studied that appeared in Earth's climate is always changing. From the study of ice time in the past show that weather can change by itself, and changed drastically.

and one of the consequences of global warming is showing 30 new diseases that emerged during the years 1976-2008 because of climate change and global warming.

and as a result of the influence of global warming is also felt on the island of Java. temperature on the island of Java increased drastically in the last 10 years the maximum temperature only reached 34,8^o. and these last few days the temperature on the island of Java reached 35,6^o. it means that the temperature increase on the island of Java 0,8^o.