ESA’s Mars Express takes us on a journey across the southern highlands of Mars, including a flight around Flaugergues Crater.
In the early 1960s, Dutch astronomer Adriaan Blaauw observed stars moving at unusually high speeds moving through the Milky Way. These stars, as it turned out, were unbound objects that had been kicked out of the Milky Way and periodically looped back and forth through the disk. Blaauw proposed that these stars originated in binary systems and were ejected when the companion star collapsed and exploded off its outer layers in a supernova. By 2005, even faster runaway stars were observed, leading to the designation "hypervelocity stars."

