Because I noticed in the course of my studies as one, I learnt
the 2 things that you mentioned. 
Astronomy---->Sometimes at night, I lie down and stare into the
night sky, and ask myself, why the hell am I studying engineering?

Time travel---->Sometimes I ponder, if I didn't do this, this,
this, and that in the past, would I be doing that, that, that, and
this now!?!?! 
Thats why my reply to you in the previous post. 