Antarctica is a landmass.
The Antarctic Peninsula is the northernmost part of the mainland of Antarctica , located at the base of the Southern Hemisphere . Antarctica ( UK English [ ænˈtɑːktɪkə ] or [ ænˈtɑːtɪkə ] , US English [ æntˈɑːrktɪkə ] ) is Earth 's southernmost continent . A continent is one of several very large landmasses on Earth .