Answer:

Explanation:
Since the system is in international space station
so here we can say that net force on the system is zero here
so Force by the astronaut on the space station = Force due to space station on boy
so here we know that
mass of boy = 70 kg
acceleration of boy = 
now we know that


now for the space station will be same as above force




Answer:
The Earth Revolves around the sun because the Earth Tilts<u>,</u> we have night and day.
Explanation:
Hope this helps! <3
The sun?? It stays in one spot, but from our point of view, it travels around the earth...