In spanish only the Earth (f), the Sun (m), and the Moon (f) kept the pronouns (and the definite article). Mars, Jupiter, etc. are used as proper nouns, withou

In spanish only the Earth (f), the Sun (m), and the Moon (f) kept the pronouns (and the definite article). Mars, Jupiter, etc. are used as proper nouns, without a definite article nor a gender. If any, we use the male gender, as in "the (m) planet Venus".