Answer:
multiple reasons
Explanation:
satellite telecommunications, GPS, remote sensing, and space access.
Ability to test different fuels they can make for better efficiency it can go on and on my good sir. 
hope this helps
 
        
             
        
        
        
A microscope is to see smaller things that you can’t see and it is a really good tool.
        
             
        
        
        
Answer:
River Mississippi is at Flood stage
Explanation:
Although it was last reported on August 4,2019. That's it's above flood stage for most of 2019.
 
        
             
        
        
        
Answer:
An explosion of a star= Supernova 
The dense remains of a star= Neutron star 
A large mass of gas and dust= Nebula 
Explanation: