Researchers Help Generate First Image of Black Hole at the Center of Our Galaxy
A multi-institution collaboration that includes a Caltech-led imaging team has generated the first image of the supermassive black hole at the center of the Milky Way galaxy. This result provides conclusive evidence that the body, known as Sagittarius A* (Sgr A*, pronounced "sadge-ay-star"), is indeed a black hole and yields valuable clues about the workings of such massive objects, which are thought to reside at the center of most galaxies. "We not only recovered an image of Sgr A*, but also characterized the uncertainty of features in the image," says He Sun. "This analysis helped the team deliver scientific results with some guarantees." [Caltech story]
The Grid Gets Smart
Adaptive electric vehicle chargers and advanced battery designs are some of the ways Caltech researchers are building a more sustainable electric grid. Steven Low, Frank J. Gilloon Professor of Computing and Mathematical Sciences and Electrical Engineering, invented the Adaptive Charging Network (ACN). But Low and others warn that this grid is unprepared for the challenges of the 21st century. “The current grid will very soon hit a wall where, when we add renewable energy, it sits unused because the demand isn’t there at a time when the solar is running,” says Adam Wierman, Professor of Computing and Mathematical Sciences; Director, Information Science and Technology. That is why Caltech researchers are working on ways to break down that barrier to help empower an energy transformation. Julia R. Greer, Ruben F. and Donna Mettler Professor of Materials Science, Mechanics and Medical Engineering; Fletcher Jones Foundation Director of the Kavli Nanoscience Institute, is pushing the limits of the batteries themselves. [Caltech story]
Startup Company Captura Receives XPRIZE Award
Caltech-based startup company Captura, which captures carbon dioxide (CO2) from ocean water to combat climate change, has been awarded $1 million from the XPRIZE Carbon Removal competition. Captura was co-founded by Harry Atwater, Otis Booth Leadership Chair, Division of Engineering and Applied Science; Howard Hughes Professor of Applied Physics and Materials Science; Director, Liquid Sunlight Alliance, and Chengxiang "CX" Xiang, Research Professor of Applied Physics and Materials Science. It has the potential to scale up to harvesting gigatons of carbon dioxide—that is, billions of tons—from the ocean every year. "As far as we can tell, Captura is one the very few companies that is doing carbon capture from ocean water," Xiang says. [Caltech story]
What Is the Future of Wind Energy?
Humans have used windmills to capture the force of the wind as mechanical energy for more than 1,300 years. Unlike early windmills, however, modern wind turbines use generators and other components to convert energy from the spinning blades into a smooth flow of AC electricity. In this video, John Dabiri, Centennial Professor of Aeronautics and Mechanical Engineering discusses the future of wind energy technology. [Caltech story]