Exosphere: meaning, definitions and examples
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exosphere
[ɛkˈsɒsfɪr ]
Definition
atmospheric layer
The exosphere is the uppermost layer of Earth's atmosphere. It extends from about 600 kilometers (370 miles) above the Earth's surface to about 10,000 kilometers (6,200 miles) into space. In this layer, atmospheric particles are so sparse that they can travel hundreds of kilometers without colliding with one another. The exosphere contains the fewest gas molecules and is primarily composed of hydrogen and helium. This layer is also the point where Earth's atmosphere transitions into outer space.
Examples of usage
- Satellites operate within the exosphere.
- The exosphere is nearly a vacuum.
- Scientists study the exosphere to understand space weather.
- The transition from the thermosphere to the exosphere is gradual.
Interesting Facts
Etymology
- The word comes from the Greek 'exo-', meaning 'outside,' and 'sphaira,' meaning 'sphere.'
- It was first defined in scientific texts in the early 20th century as scientists studied Earth's layers.
Science
- This layer begins around 600 km (about 370 miles) above the Earth's surface and extends to around 10,000 km (6,200 miles).
- The temperature in the exosphere can reach thousands of degrees, but because the air is so thin, it wouldn't feel hot.
- Satellites, including weather and communication satellites, often orbit within the exosphere, benefiting from its low air resistance.
Atmospheric Layers
- The exosphere is the final layer above the thermosphere, which is itself notable for its high temperatures.
- Below the exosphere are several layers, including the stratosphere and mesosphere, each with distinct characteristics.
Exploration
- Astronauts traveling to space briefly pass through this layer before reaching space.
- The exosphere is where phenomena such as auroras and the Northern Lights are observable from lower layers of the atmosphere.
Technological Impact
- The study of the exosphere is crucial for predicting satellite behavior and preventing collisions in space.
- Scientists continuously monitor the exosphere to understand space weather, which can impact radio and satellite communications.
Translations
Translations of the word "exosphere" in other languages:
🇵🇹 exosfera
🇮🇳 एक्सोस्फीयर
🇩🇪 Exosphäre
🇮🇩 eksosfer
🇺🇦 екзосфера
🇵🇱 egzosfera
🇯🇵 外気圏
🇫🇷 exosphère
🇪🇸 exosfera
🇹🇷 egzosfer
🇰🇷 외기권
🇸🇦 الطبقة الخارجية
🇨🇿 exosféra
🇸🇰 exosféra
🇨🇳 外气层
🇸🇮 egzosfera
🇮🇸 ytra andrúmsloft
🇰🇿 экзосфера
🇬🇪 ექსოსფერო
🇦🇿 ekzosfer
🇲🇽 exosfera