Look to the stardust: UTSA professor eyes way to cool the Earth
Angela Speck, professor and chair of the UTSA department of physics and astronomy, is studying how injecting small dust particles into the stratosphere can cool the Earth.On the third floor of the Applied Engineering and Technology building at the University of Texas at San Antonio, Angela Speck’s office is a miniature space station. Images of the universe line the walls. There’s a graph of the light spectrum on the floor.
All of this work, however, starts in the lab with Speck and her team. Not just any material can be shot into the Earth’s atmosphere. It has to be perfect. So far, Speck is most interested in a substance called silicate. Silicate minerals are one of the most common minerals on Earth, found in rocks such as quartz, mica and olivine. It’s also found in stardust. The material called silicon carbide naturally occurs in space, but predominantly it’s produced synthetically on Earth. Scientists initially identified silicon carbide in space by comparing the properties of the synthetic version.
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