The Heisenberg's uncertainty principle shows us a glimpse of how ignorant we are about the quantum world and hence the cosmos itself.It's a wonderful reminder of how humble we are in this vast emptiness filled with great wisdom and wonder.
Basically,the uncertainty principle is an in-equation which contains the variables as uncertainty in position and mass & velocity (that is momentum) of the particle.That is 
(ħ is the reduced Planck constant, h / 2π).This states that the position and velocity of any particle cannot be simultaneously and precisely determined.
(ħ is the reduced Planck constant, h / 2π).This states that the position and velocity of any particle cannot be simultaneously and precisely determined. 
As the value of the certainty of position increases the uncertainty of momentum increases and vice versa.
This wonderful relation that's been the foundation of quantum mechanics can be experimentally verified right at your home.That's the humbleness of science.Watch the below video to get your head around this.
