Latest Five-Year Mission Of Discovery Stories
NASA's Solar Dynamics Observatory (SDO) passed a major milestone on May 14, when it completed its post-launch check out and officially began its five-year science mission to study the sun.
Word of the Day
- Withering but not falling off, as a blossom that persists on a twig after flowering.
The word 'marcescent' comes from a Latin word meaning 'to wither'.