The Romany, also known as Gypsies, are associated in popular culture with fortune-telling, with a nomadic caravan lifestyle, and with music and colorful dances. They live all across Europe, but usually remain distinct from other local populations.
supergiant-an extremely bright star of very large diameter and low density. star - (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior.
A supernova remnant is simply what is left over (i.e. the remnant) of a supernova. That probably isn't a very helpful definition, so I'll try to explain what I mean. A supernova is simply the explosion of a star.