Archive for the ‘Video’ Category

The scale of the universe

Astronomers identify signature of Earth-eating stars

Students of Vanderbilt University are developing a model to find stars that swallow planets explained how planets are formed and help find other Earth-like planets outside of our solar system.

“Trey has shown that we can actually model the chemical signature of a star in detail, element by element, and determine how that signature is changed by the ingestion of Earth-like planets,” said Vanderbilt Professor of Astronomy Keivan Stassun, who supervised the study. “After obtaining a high-resolution spectrum for a given star, we can actually detect that signature in detail, element by element.”

Student of Astronomy, Trey Mack, developed the model that shows what happens to a star when it swallows Earth-like planets during its development. Mack then applied this model to two twin stars to find out if they are so-called “Earth-eaters”.

Mysteries of Flower Formation

For thousands of years, people have pondered the mysteries of flower development and how these flowers ultimately give rise to fruit. Martin Yanofsky, professor of biology at UC San Diego, discusses recent studies that have begun to unravel these long-standing mysteries, leading to a detailed understanding of how a handful of genes interact to direct the formation of flowers and fruit. This new-found knowledge offers remarkable opportunities for increasing the yield of agriculturally important crop plants. Series: “Evolution Matters”