- Astronomers have discovered some stars that seemingly orbit around an empty space. Astrometric binaries are relatively nearby stars which can be seen to wobble around a point in space, with no visible companion. The same mathematics used for ordinary binaries can be applied to infer the mass of the missing companion. The companion could be very dim, so that it is currently undetectable or masked by the glare of its primary, or it could be an object that emits little or no electromagnetic radiation, for example a neutron star.
- The Two Towers (Wikipedia)
The Two Towers is the second volume of J. R. R. Tolkien’s high fantasy novel The Lord of the Rings. It is preceded by The Fellowship of the Ring and followed by The Return of the King. The volume’s title is ambiguous, as five towers are named in the narrative, and Tolkien himself gave conflicting identifications of the two towers. The narrative is interlaced, allowing Tolkien to build in suspense and surprise. The volume was largely welcomed by critics, who found it exciting and compelling, combining epic narrative with heroic romance.