WATCH: A total solar eclipse races across North America, thrilling millions as the moon shrouds the sun for a few minutes across the continent. | 🎥: NASA | INQUIRER.net

Do you know why a total solar eclipse is so unique and so rare? During this rare event the Moon positions itself precisely between our planet and the Sun, creating a momentary blackout, revealing the Sun’s corona. It is a once-in-a-lifetime opportunity for most people as it casts a shadow on only a fraction of the Earth's surface. #Space #Science #Eclipse #SolarEclipse | Museum of Science, Boston