A notable collision is occurring on Earth, or at least one that appears imminent. The object that could be coming to a stop is travelling at 18,000 MPH! This is what it looks like!NASA has raised alarm about a large asteroid approaching Earth. It measures between 318 to 720 feet in height, roughly the same size as the Taj Mahal or the Great Pyramid Of Giza.It even has a name: 2008 G020.It's all relative when we talk about near-collision. It is supposed to be as close to Earth as possible at 2.8 million miles. It's called an Apolo in NASA-ese, which is a "near Earth" designation.For context, Mars is 236.5 million kilometers away from Earth. The Moon is 238,855 km away. The middle is somewhere.It won't be the closest encounter we have with G020. It was 1,000,000 miles away from Earth in 1901.