What's an astronaut’s favorite part of a computer?

I fear for the calendar, Its days are. . .

What is an astronauts favorite drink, while being very hard to find in space?

Can't buy me, for I'm just a state of mind,Chasing me means I am hard to find.I am the bright glow that warms you inside.I'm the foe of sorrow, behind a smile,And staying to make life worth your while.What am I?

I have trees but sell no wood, I have grass but grow no farm, people spread their blankets on me eat their lunch and come to calm, kids run wild and dogs run free yet no one owns a single tree and in a city full of rush I am the one green breathing hush. What am I