Astronomy Tonight for - 04-21-2025

On April 21st in astronomical history, one of the most exciting events occurred in 2018 when the Transiting Exoplanet Survey Satellite (TESS) was launched by SpaceX on a Falcon 9 rocket from Cape Canaveral Air Force Station in Florida. TESS is NASA's planet-hunting spacecraft, designed to search for exoplanets orbiting nearby stars. Its mission is to survey the entire sky, focusing on the brightest stars near Earth, in hopes of finding planets that could potentially harbor life. Imagine the thrill of the scientists and engineers as they watched TESS soar into the sky, carrying with it the hopes and dreams of discovering new worlds beyond our solar system. The spacecraft, about the size of a refrigerator, was equipped with four wide-field cameras that would allow it to observe nearly 85% of the entire sky over its two-year primary mission. As TESS ascended into orbit, astronomers around the world held their breath, knowing that this plucky little explorer might soon revolutionize our understanding of the cosmos. And indeed, TESS has not disappointed! Since its launch, it has discovered thousands of exoplanet candidates, including some that are potentially habitable. So, on this day in 2018, humanity took a giant leap forward in its quest to answer one of the most profound questions: Are we alone in the universe? TESS continues its mission to this day, tirelessly scanning the stars and expanding our cosmic horizons. Who knows what wonders it might uncover next? Perhaps on this very day in 2025, it's making another groundbreaking discovery!