Thermosphere

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Dictionary Meaning and Definition on 'Thermosphere'

Thermosphere Meaning and Definition from WordNet (r) 2.0
    thermosphere n : the atmospheric layer between the mesosphere and the exosphere
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Wikipedia Meaning and Definition on 'Thermosphere'


The thermosphere is the biggest of all the layers of the earth's atmosphere directly above the mesosphere and directly below the exosphere. Within this layer, ultraviolet radiation causes ionization. The International Space Station has a stable orbit within the middle of the thermosphere, between 320 and 380 kilometres (200 and 240 mi). Auroras also occur in the thermosphere.

Named from the Greek θερμός (thermos) for heat, the thermosphere begins about 80 kilometres (50 mi) above the earth. At these high altitudes, the residual atmospheric gases sort into strata according to molecular mass (see turbosphere). Thermospheric temperatures increase with altitude due to absorption of highly energetic solar radiation by the small amount of residual oxygen still present. Temperatures are highly dependent on solar activity, and can rise to 1,500 °C (2,730 °F). Radiation causes the atmosphere particles in this layer to become electrically charged (see ionosphere), enabling radio waves to bounce off and be received beyond the horizon. At the exosphere, beginning at 500 to 1,000 kilometres (310 to 620 mi) above the Earth's surface, the atmosphere turns into space.

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Thermosphere Sample Sentences in News


  • Covidien Unveils Advanced Ablation Device for Liver Tumor - Analyst Blog
    Aiming to capitalize on the opportunities in the inoperable liver cancer market, Covidien plc ( COV ) unveiled Emprint Ablation System with Thermosphere Technology an advanced ablation system designed to precisely heat and destroy diseased soft tissue in the Read more on this news related to 'Thermosphere'
  • Sounding Rocket Set To Study The Sun's Energy
    April Flowers for redOrbit.com - Your Universe Online On July 14, NASA will launch a sounding rocket from White Sands Missile Range in New Mexico. A little before noon, the rocket will streak 180 miles into the atmosphere, sending it into the thermosphere layer, beyond the ozone's ability to block the sun's high energy light. Sounding rockets are small pay Read more on this news related to 'Thermosphere'

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