The thermosphere is so hot because it absorbs a large amount of the ultraviolet and x-ray radiation coming to Earth from the sun, converting it to heat. Its temperature is extremely variable, based on both the time of day and the sun's activity.Know More
Temperatures within the thermosphere increase at higher levels until it becomes somewhat stable up to the thermopause, the end of the thermosphere and the beginning of the exosphere. In upper levels, the typical temperatures of the thermosphere are usually anywhere between 900 degrees and 3,600 degrees Fahrenheit. This temperature often is about 400 degrees Fahrenheit hotter during the day than at night. It is around 900 degrees Fahrenheit hotter when the sun is very active than when it is inactive.
The thermosphere is considered part of the atmosphere, but it is extremely thin and has different components than the lower atmosphere. Rather than the mix of gases found in the lower atmosphere, different elements tend to be in different regions in the thermosphere. In addition, the gas molecules tend to dissociate into individual atoms, so that the gases in the thermosphere are largely atomic oxygen, atomic nitrogen and helium. These gases are frequently hit by ionizing radiation from the sun, stripping electrons from them.Learn more about Earth Science
The sun is important to Earth because it helps regulate the climate, is the main source of energy for producers in the ecosystems and it keeps the oceans from freezing, along with providing light. If just one of these factors changed dramatically, it would impact all life on Earth. Without the sun, the planet's oceans would freeze, temperatures would drop and all life would die off without light or food.Full Answer >
In the year 1515, Nicolaus Copernicus theorized that the Earth was a planet and discovered the idea of a heliocentric solar system, a system in which all planets revolved around the sun. He built his own observatory in 1513 to help him watch the actions of planets.Full Answer >
The heat that radiates from the sun and heats up the land begins to heat up the air and then escapes into the atmosphere due to the lack of clouds and humidity. This is the main reason that deserts can be hot during the day but cold during the night.Full Answer >
Most of the ultraviolet rays that hit the Earth come from the sun. However, there are man-made items that give off ultraviolet rays, such as tanning beds, mercury vapor lamps and black lights.Full Answer >