Something big is about to happen on the sun. According to measurements from NASA-supported observatories, the sun's vast magnetic field is about to flip.
Researchers at the Universities of Leeds and Chicago have uncovered an important mechanism behind the generation of astrophysical magnetic fields such as that of the Sun.
A big problem with the use of electric rocket engines known as Hall thrusters has been erosion of their discharge channel walls, limiting their use to the inner solar system.
Space portals allowing travelers to navigate vast distances between the stars have long been a theme in popular science fictions stories such as Stargate.
Mercury's a bit weird, say NASA scientists, with a different surface composition and magnetic field to other planets.
The inner core of the Earth appears to be simultaneously melting and freezing, because of heat circulation in the rocky mantle that covers it.