What is a trophosfera?

Is Hades stronger than Zeus? What life is on Andromeda galaxy? When will robots dominate the world? What makes up the atmosphere of the planet mars? What is Mars position? What tempareture is Rigel? How hot is a K type star? When did john glen go into space? What is the scientific theory behind the use of the periscope? What was the control centre which Apollo 11 took in? Can we see radio waves with the naked eye? Who spent the longest period in space? What are the oldest lunar features called? How is the clarity of a diamond determined? How does a magnifying glass make objects appear bigger? What is the brightest star in Cygnus? Why are there no 4 billion year old rocks? What does it mean if someone is observing you? How do astronauts breathe on the International Space Station? Why must moon shadow and his father leave the company?