%2d outputs a decimal (integer) number that fills at least 2 character spaces, padded with empty space. %6.2f outputs a floating point number that fills at least 6 character spaces (including the decimal separator), with exactly 2 digits after the ., padded with empty space. Good for dollar and pound currency amounts.
Asteroid hurtles towards earth. Scientists were today, January 4th, 2014, warning of a possible asteroid collision with the Earth.
In the image below, artist Don Davis has imagined what a very large asteroid impacting Earth might look like. The target, Earth in this case, will survive the impact intact. But the surface will be forever changed by the energy of the event, and the massive impact crater formed as a result.