Yong Zheng

Graduate Student

"The Invisible Gas that Fills up the Space"

We live in an environment that is filled with invisible gas, such as oxygen, water vapor, carbon dioxide, etc. Although transparent, this gas plays an important role in sustaining human beings' activities on Earth. Similarly, out in space, there exists invisible gas that helps the evolution of celestial objects at various astronomical scales. I will discuss the existence of gas in various astronomical environments and explain how astronomers use telescopes and modern techniques to detect and quantify these invisible but critical gas in the universe.