On May 1, 1949, Neptune's moon Nereid was discovered by the Dutch astronomer Gerard Kuiper. [‘On This Day in Space’ Video Series on Space.com] This was the second of 14 moons discovered at Neptune. It was also the last one to be discovered with certainty before NASA's Voyager 2 spacecraft flew by Neptune in 1989.

Hubble Space Telescope imagery Neptune has revealed that the planet's clouds are disappearing. Credit: NASA Goddard Space Flight Center

The James Webb Space Telescope's Near-Infrared camera (NIRCam) captured stunning imagery of Neptune. It is the "clearest view of this peculiar planet’s rings in more than 30 years,” according to ESA/NASA.