Table: star_data
Columns: star
stellar_classification
distance_from_earth_ly
constellation
dust_or_debris_temperature_k
system
dust_or_debris_location_au
cool_dust_10_au
stellar_age_myr

Question: Name number of stellar classification for 3 neptune planets < 1 au
SQL: SELECT COUNT("stellar_classification") FROM star_data WHERE "system" = '3 Neptune planets < 1 AU'

Question: Name the system for aries
SQL: SELECT "system" FROM star_data WHERE "constellation" = 'Aries'

Question: Name the stellar age for f3v
SQL: SELECT "stellar_age_myr" FROM star_data WHERE "stellar_classification" = 'F3V'

Question: Name the dust for star being hd 69830
SQL: SELECT "dust_or_debris_location_au" FROM star_data WHERE "star" = 'HD 69830'

Question: Name the dust for star being η corvi
SQL: SELECT "dust_or_debris_temperature_k" FROM star_data WHERE "star" = 'η Corvi'