Sun activity for September 22 is moderate, with an M8.7 flare and CME. Earth's geomagnetic field has quietened, but may become active over the next two days.
We know there is water ice on the moon. But a new study suggests there is less of it in the moon's permanently shadowed regions than we previously thought.
Day and night are mostly equal on the equinox. There's a bit more daylight because the sun is a disk, not a point, and Earth’s atmosphere refracts sunlight.
The Psyche mission will launch on October 5, 2023, on a mission to explore the metal-rich asteroid Psyche. Learn more about the mission and asteroid here.