'This distance used in astronomy is abbreviated pc & is equal to 19.2 trillion miles'
a parsec
AT GREAT LENGTHS: This distance used in astronomy is abbreviated pc & is equal to 19.2 trillion miles
This distance used in astronomy is abbreviated pc & is equal to 19.2 trillion miles
This distance used in astronomy is abbreviated pc & is equal to 19.2 trillion miles
AT GREAT LENGTHS
a parsec
AT GREAT LENGTHS