This blog has frequently lamented the demotion of Pluto. After being expelled from the company of planets, it now resides in the newly-named Plutoids, in the company of Eris, Sedna and other dwarf planets. Another one-time planet suffered a worse, and lonelier, fate one hundred years ago.
The planet Vulcan came into (theoretical) being as a solution to the problem of Mercury‘s orbit, which deviated from the track that Newton’s laws laid down for it. Continue reading →
Status is a funny thing. When Pluto was relisted as a dwarf planet, it was definitely a demotion. For the former asteroid Ceres, however, it was a step up. What had been an unusually large asteroid has moved into a whole new league. This was a bit unfortunate for astrologers, as they had taken the four largest asteroids, all named for Classical goddesses, as a balancing-act for the male-dominated planets.
Continue reading →