snowballs
That's a description sometimes given to comets.
Planetesimals made from ice and sometimes rock are called comets.
.... errr - well comets.
Jan Hendrik Oort suggested that comets come from the Oort Cloud. This is sometimes called the Oort Hypothesis.
A telescopetelescopes of course
short period comets
Asteroids, some comets, and dwarf planets are classified as minor planets. Stars and galaxies are much larger than planets There are dwarf planets and these are Ceres Pluto and Eris.
long period comet
Comets are called this because of the ice and dust inside the nucleus. Now go look up everything else on your own.
The small bodies of water that travel through space are called comets. Comets are icy bodies that release gas and dust as they orbit the Sun, creating a glowing coma and sometimes a visible tail.
Dirty snowballs
Its called FRICTION