By Inara Pey – Inara Pey: Living in a Modem World. Visit Space Sunday: 100+ planets, taking a balloon to orbit, and budgets for original post.
When is a planet not a planet – or more precisely, when should what is not regarded as a planet be a planet? Right now, according to the International Astronomical Union (IAU), our solar system comprises eight formally recognised planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. That’s been the case since 2006, […]