The long hunt for new objects in our expanding solar system
- Written by The Conversation Contributor
Artist's impression: Looking back 12.9-billion km towards the sun and the inner solar system from Sedna, one of the recently discovered minor planets in the Kuiper belt.NASA, ESA and Adolf SchallerRecognise these planet names: Vulcan, Neptune, Pluto, Nemesis, Tyche and Planet X? They all have one thing in common: their existence was predicted to...






