Stars like the Sun are remarkably constant. They vary in brightness by only 0.1% over years and decades, thanks to the fusion of hydrogen into helium that powers them. This process will keep the Sun ...

There’s an intense space race back to the Moon underway — between the People’s Republic of China and the United States. Undergirding the PRC’s ambitions is a rocket known as the Long March 2, a ...

A solar storm simultaneously hit Earth, the moon and Mars - the first time an eruption was measured on three planetary surfaces at once. An international fleet of spacecraft detected the outburst, ...

Scientists confirm Earth doesn’t have a permanent second moon, only small quasi-satellites and 'minimoons' that briefly share its orbit. @wirestock/Freepik The idea that Earth might have a second moon ...