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.
exists and is an alternate of . Astronomy is the study of the universe with particular reference to celestial bodies. The planets, the moons, the sun and other stars, galaxies, etc. all fall under astronomy. Astronomy is comparable to a physical geographic study of space. Not to be confused with astrophysics, the study of the physics or composition of celestial bodies.