25 Years of Solar Cycles in One Incredible SOHO Mosaic

For a quarter of a century, the ESA-NASA Solar and Heliospheric Observatory (SOHO) has been essential in helping scientists understand the heart of our Solar System, the Sun. The SOHO mission launched 25 years ago this week, and to celebrate, ESA compiled a wonderful mosaic of images, and NASA put together a remarkable SOHO "greatest …