a person trained to travel in a spacecraft
the study of stars to predict the future
the environment as it relates to living organisms
Account or study of myths
instrument permitting those in a submarine a view of the surface
a drawing that explains something
a design composed of letters, usually the first letter of a name.
a type of camera lens that makes it possible to take a close-up picture of a distant object.
A word that means the same as another word
word that sounds like another but differs in meaning and spelling
the most powerful members of a society
people who study stars, planets, and other heavenly bodies
the path of an object as it revolves around another object in space
a magnifier of images of distant objects
a collection of things (goods or works of art etc.) for public display