Sorry. In Christmas week, I was so busy so I couldn't posted on blog.
Between the Mars and the Jupiter, there are many asteroid. So this zone called "Asteroid belt". They are about 2.2AU~3.2AU from the Sun. Most of astronomers think asteriods were some dwarf planets. Those dwarf planets' size were maybe simillar or smaller than the Moon. Maybe the Jupiter's gravity disturbance creation of one planet. Many asteroids were made by crash of many dwarf planets.
1.How do asteroid belt was discovered?
Giuseppe Piazzi found one planet at 1801. This planet was about 2.8AU(predicted by Bode's law) from the Sun, and its orbital period is about 4.6years. This planet was so samll. The Moon's radius is 5times bigger than this planet. This planet was named by Ceres, the goddess of Sicily. And Heinrich Olbers found Pallas in 1802. Juno was found at 1804 and Vesta was found at 1807. And many small planets were discoverd. At 1872, about 100 small planets were discovered. Those planets are so small, so planets that radius is bigger than 100AU are only 33. Those planets started called by asteroid, and this zone was called "Asteroid belt"
Between the Mars and the Jupiter, there are many asteroid. So this zone called "Asteroid belt". They are about 2.2AU~3.2AU from the Sun. Most of astronomers think asteriods were some dwarf planets. Those dwarf planets' size were maybe simillar or smaller than the Moon. Maybe the Jupiter's gravity disturbance creation of one planet. Many asteroids were made by crash of many dwarf planets.
1.How do asteroid belt was discovered?
Giuseppe Piazzi found one planet at 1801. This planet was about 2.8AU(predicted by Bode's law) from the Sun, and its orbital period is about 4.6years. This planet was so samll. The Moon's radius is 5times bigger than this planet. This planet was named by Ceres, the goddess of Sicily. And Heinrich Olbers found Pallas in 1802. Juno was found at 1804 and Vesta was found at 1807. And many small planets were discoverd. At 1872, about 100 small planets were discovered. Those planets are so small, so planets that radius is bigger than 100AU are only 33. Those planets started called by asteroid, and this zone was called "Asteroid belt"
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