TWO mysteriously off-course spacecraft and the biggest puzzle in physics today – the nature of dark energy – could have a common explanation. If so, be prepared to accept that our sun is putting on some weight.
Hans Fahr at the University of Bonn in Germany and Michael Heyl at the German Aerospace Centre, also in Bonn, set out to solve a puzzle that has been vexing cosmologists ever since it was first noticed that the expansion of the universe is accelerating. This acceleration has been attributed to dark energy, which many think is the inherent energy of space-time, described by the…
