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by Pfc_Parts 1807 days ago
Well, originally astrophysics involved staring at the sky for long periods and coming up with hypotheticals and maybe even theories about the movement of celestial bodies? it was very inexpensive and led to the fame of people like Galileo. Later, staring at the night sky was eclipsed a little. Folks like Gerard P. Kuiper used telescopes and made more detailed observations. The feild then rapidly became more complicated, but staring at the sky and eventually mastering the skill of designing and building your own detectors (what we in the feild refer to as "remote sensing") remains a proven method.

I wish you all the good luck in the universe :)