Emission

Positron Emission Tomography uses a radioactive tracer to visualize metabolic activity within the human body.

Filters stop emission of gas into the atmosphere.

Because their rapid pulse of radio emission is so predictable, a large array of well-understood pulsars can be used to measure extremely subtle abnormalities, such as gravitational waves.

By determining the time between the emission of the sound pulse and its reception, the sonar transducer can determine the range and orientation of the object.

Parker Solar Probe has been designed to withstand the extreme conditions and temperature fluctuations for the mission. The key lies in its custom heat shield and an autonomous system that helps protect the mission from the Sun’s intense light emission, but does allow the coronal material to “touch” the spacecraft.

To be absolutely sure the Solar Probe Cup would withstand the harsh environment, the Odeillo Solar Furnace—which concentrates the heat of the Sun through 10,000 adjustable mirrors—was used to test the cup against the intense solar emission.

Algeria needs to make significant decreases of carbon dioxide emission.

Algeria needs to decrease its emission levels.

Saving energy can reduce the emission of greenhouse gases into the atmosphere.

NASA’s Parker Solar Probe mission touched the Sun to provide us the first ever direct observations of the solar atmosphere, the corona, as well as traveling by Venus, where it gave scientists the first complete look at Venus’ orbital dust ring, detected a bright rim around the edge of the planet that may be nightglow, and discovered natural radio emission.