When NASA's Nancy Grace Roman Space Telescope launches, as early as the end of next month, it will attempt one of astronomy's most precise disappearing acts to date. The telescope will carry the first space-bound active" coronagraph, an instrument that effectively erases most of the light from a star during photography. It will allow astronomers...

This is today's edition of The Download, our weekday newsletter that provides a daily dose of what's going on in the world of technology. Shape-shifting mirrors on NASA's new space telescope could unveil Jupiters like our own When NASA's Nancy Grace Roman Space Telescope launches, as early as the end of next month, it will...