Tim Peake and space station crew mates return to Earth

Europe’s LISA Pathfinder mission — a fundamental physics lab launched last year to a point a million miles from Earth — has demonstrated the mind-boggling technology required for a future space-based observatory to listen for faint, low-frequency vibrations emitted by invisible objects in the most distant pockets of the universe, scientists said this week.

By pinning down, for the first time, the three-dimensional motions of individual stars in the nearby Sculptor dwarf galaxy, astronomers have shed new light on the distribution of invisible dark matter that pervades the galaxy.

Fierce flashes of light ripple through delicate tendrils of gas in this new image, from ESA’s Herschel Space Observatory, which shows the dramatic heart of a large and dense cosmic cloud known as Mon R2 in the constellation Monoceros that lies eight degrees east of the Orion Nebula. Mon R2 lies some 2700 light-years away and is studded with hot, newly-formed stars.