50th Anniversary 1st moon walk Many exhibits and celebrations in US for the 50 th Anniv. Building rockets for space. NICER Mission Maps ‘Light Echoes’ of New Black Hole. A newky discovered black hole, MAXI J1820+070 (J1820), is consuming material from a companion star. Waves of X-rays formed “light echoes” that reflected off the swirling gas near the black hole and revealed changes in the environment’s size and shape. https://www.nasa.gov/feature/goddard/2019/nasa-s-nicer-mission-maps-light-echoes-of-new-black-hole. Building large rockets to launch to the Moon in the Artemis Moon Program.