October 28, 2026

Researchers have mapped the Sun's outer magnetic field in 3D for the first time. Better models of that field feed into space weather forecasts, including the geomagnetic storms that produce auroras.

A video shows Ganymede briefly blocking Io from view on Oct. 20, 2026, a mutual occultation of two of Jupiter's Galilean moons. These events are rare because they need an edge on view of the moons' orbits, which happens about once every six years when Jupiter reaches its equinox. Ganymede also cast its shadow on Jupiter's right side, so this is a chance that does not come around often.

NASA's systems engineering team has outlined the mission architecture for the Habitable Worlds Observatory, a planned telescope meant to search for Earth-like planets around other stars.