People can fall: â  from the edge of a completed roof; â  from the edge where work is being carried out; or â  through openings or gaps. Edge protection Unless the roof parapet provides equivalent safety, temporary edge protection will be required during most work on flat roofs.
Why is astronomy considered the original science? Astronomy is the oldest science for our ancients either drew or made structures according to seasons or movements of celestial bodies in our Universe.
In answer to the OP â yes, absolutely. Astronomy is often considered a subfield of physics (many people prefer to call it âastrophysicsâ). Just as in other physics subfields, astronomers make falsifiable predictions that they test in controlled experiments. I think thatâs an acceptable threshold for âhard science.â.