Worlds of the approximate size of Earth appear to dominate our Milky Way.
A quasar is observed to act as a gravitational lens for the first time, which allows an estimate of the mass of the galaxy hosting the quasar.
A star with 265 times the mass of our Sun is discovered, the heaviest one discovered to date.
The Planck spacecraft, designed to observe the cosmic microwave in unprecedented detail, releases its first all sky map.
Astronomers verify that a supposed directly imaged exoplanet is indeed a planet.
The Earth and Moon may have been formed over a hundred million years later than previously thought.
The science team for the Kepler spacecraft announces the discovery of 306 new extrasolar planets.
Some characteristics of Titan's atmosphere is consistent with the existence of methane-based life, although there are likely other explanations.
An exoplanet discovered last year appears to be in the process of being eaten by its parent star.
The same astronomer that observed an impact on Jupiter in 2009 manages to observe another one.
