The planet’s rotation fluctuates as it travels around the sun, and measurements suggest we’re losing more than a millisecond ...

WASP-121b is unlike anything in our Solar System. This giant planet orbits its star so closely that it completes a full orbit in just 30.5 hours. Its dayside reaches a scorching 3000°C, while the ...

ESA's Solar Orbiter captured a "tube of cooler atmospheric gases snaking its way through the Sun’s magnetic field," according ...