An international research team led by the Paul Scherrer Institute PSI has measured the radius of the nucleus of muonic helium ...

Nucleus close nucleusA cell component found in most cells which contains the genetic material (DNA) of the organism and controls the cell’s activities.: In the model, this is the grape.

A comet primarily consists of a nucleus, coma, hydrogen envelope, dust and plasma tails. Scientists analyze these components to learn about the size and location of these icy bodies, according to ESA.