How do astronauts and cosmonauts combat the degenerative effects of microgravity experience on the international space station?

Which planet has a gas giant and largest rings? How can solar radii be used to describe the sizes of stars including the subgroups of white dwarfsgiants and super giants? Are shadows always there and is darkness a shadow? What are K class stars? What are the names of satellites sent to space by India? What direction pv cells should face in US? How invented the outdoor thermometer? What happens to white dwarfs as they age? Was Tiresius a personal prophet of Apollo? What is Mariner 2? What kind of clouds were out today in Webster? Why does the moon to appear to change shape during the month? How did Neil Armstrong affect space exploration? What is nasas Houston space headquarters called? How many planets are bigger than the moon? Why a cow eating the grass would not gain all the energy that the leaves had absorbed from the sun? What is the date and what is the phase of the moon? Is space travel to Mercury possible? Do clouds create rainbows? Do you use a dark or light color to make something in a picture look farther away?