A new experiment tests how dust grains coalesced into planetesimals in the early solar system.
New measurements suggest that most deuterium was produced in the aftermath of the big bang.
A new satellite records the first global pictures of the Earth's plasmasphere. A new theory suggests that in some regions of space time might run backwards. New images recorded by the Galileo spacecraft map the fast spray of sodium atoms coming from Jupiter's moon Io. Radio maps of the core of galaxy M87 show the place where a massive jet originates. A pendulum helps scientists to understand the gravity generated by the gravitational field itself.