# 1เลือกประเภทWhat model of the solar system places the Earth at its center?GeographicGeometricGeocentricHeliocentric
# 2เลือกประเภทWhat model of the solar system places the Sun at its center?GeographicGeometricGeocentricHeliocentric
# 3เลือกประเภทWhy is Venus known as Earth's twin sister?Because they are almost the same in size.Because they have the same gravity.Because they developed at the same time.Because they were discovered at the same time.