International Association of Physics Students is the association behind the PLANCKS. They are an association of physics students and student societies from around the globe, working to promote peaceful collaboration amongst them. Since 1987, IAPS has worked continuously to support friendly relations and collaboration between physics students.
They support their members in academic and professional work, as well as discussing and acting on scientific, social and cultural issues. IAPS is a recognised non-governmental organisation run entirely by students from around the world with a spirit of mutual understanding and equality.
Other than PLANCKS, IAPS runs an annual International Conference for Physics Students (ICPS), visits to global research institutions, summer schools, exchange programmes and multinational meetings all over the world.
If you want to know more, you should check out their website for fresh news.