The asteroid will be visible for several nights from different parts of the world. We’ll tell you when and where to look, and what equipment you’ll need to spot it. The European Space Agency (ESA) confirmed that this weekend, asteroid (152637) 1997 NC1 will make its closest approach to Earth in 400 years. There's no risk it will hit Earth, but it will be visible through commercial telescopes and astronomical bin... [5466 chars]