
Privacy
Sun | |
---|---|
State | |
Country | |
Capital | |
Population | 0 |
The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy mainly as light and infrared radiation. It is by far the most important source of energy for life on Earth. Its diameter is about 1.39 million kilometres (864,000 miles), or 109 times that of Earth, and its mass is about 330,000 times that of Earth. It accounts for about 99.86% of the total mass of the Solar System.
Roughly three quarters of the Sun's mass consists of hydrogen (~73%); the rest is mostly helium (~25%), with much smaller quantities of heavier elements, including oxygen, carbon, neon, and iron.The Sun is a G-type main-sequence star (G2V) based on its spectral class. As such, it is informally and not completely accurately referred to as a yellow dwarf (its light is closer to white than yellow). It formed approximately 4.6 billion years ago from the gravitational collapse of matter within a region of a large molecular cloud. Most of this matter gathered in the center, whereas the rest flattened into an orbiting disk that became the Solar System. The central mass became so hot and dense that it eventually initiated nuclear fusion in its core. It is thought that almost all stars form by this process.
Great Yarmouth | |
---|---|
State | |
Country | |
Capital | |
Population | 0 |
Great Yarmouth, often called Yarmouth, is a seaside resort and minster town in Norfolk, England, straddling the River Yare, some 20 miles (30 km) east of Norwich. A population of 38,693 in the 2011 Census made it Norfolk's third most populous place. Its fishing industry, mainly for herring, shrank after the mid-20th century and has all but ended. North Sea oil from the 1960s brought an oil-rig supply industry that services offshore natural gas rigs. More recent offshore wind power and other renewable energy have led to further services. Yarmouth has been a resort since 1760 and a gateway from the Norfolk Broads to the North Sea.
Delft (Dutch pronunciation: [dɛlft] (listen)) is a city and municipality in the province of South...
Medicine Hat is a city in southeast Alberta, Canada. It is located along the South Saskatchewan...
Kuala Lumpur (Malaysian pronunciation: [ˈkualə, -a ˈlumpo(r), -ʊ(r)]), officially the Federal...