How stripped-envelope supernovas lose that outer envelope is not entirely clear.
The ExoMars Trace Gas Orbiter has returned the first images of the Red Planet from its new orbit.
A group of students and researchers at Delft University of Technology are designing a starship capable of keeping generations of crew alive as they cross the gulf between stars - and they've turned to ESA for the starship's life support.
Around four billion years ago, the Moon had a magnetic field that was about as strong as Earth's magnetic field is today.
The first stars in the universe blazed to life about 200 to 400 million years after the big bang.
This view of Cuba looks from east to west and reaches the cities of Santiago de Cuba on its west coast and Havana on its east coast. The sun's glint is reflected off the Caribbean Sea on Cuba's southern coast.
