light bulb

(a)  

to launch

(a)  

to replace

(a)  

NASA

(a)  

Hubble telescope

(a)  

space shuttle

(a)  

space agency

(a)  

to change

(a)  

(measure word) especially for airplane

(a)  

mirror

(a)  

very; really

(a)  

not…but…

(a)  

control; to control

(a)  

Europe

(a)  

ESA

(a)  

matter; thing; trouble

(a)  

image

(a)  

telescope

(a)  

reparation; to repair

(a)  

to fix; to repair(Character)

(a)  

to fix; to repair(word)

(a)  

in a moment

(a)  

centre

(a)