TASK DEFINITION: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
PROBLEM: Category: START SAVING NOW
Clue: This $1.5 billion dollar telescope, seen here, has opened our Earth-bound eyes to undreamed-of splendors

SOLUTION: the hubble space telescope

PROBLEM: Category: DOUBLE TALK
Clue: This word for an inadvisable act is a real double negative

SOLUTION: no-no

PROBLEM: Category: SCIENCE
Clue: The Crookes tube, used to study these rays, led to the creation of the TV picture tube

SOLUTION:
cathode rays