Sirius is one...
There are 400 billion stars in our galaxy - we can't name them all.
the sun
The Sun. Seriously, the Sun is a star and we are in the Milky Way.
Sontara (in the Star Wars galaxy) Sontar
sun is the brightest star in the galaxy
The "star" that floats next to Rosalina is called a 'Luma' the Lumas are from Super Mario Galaxy. And Super Mario Galaxy
If by star system you mean more than one star but not a galaxy then Alpha Centauri is the closest star system
The "Milky Way" is the name of the galaxy in which we live.
Denebia (in the Star Wars galaxy). Deneb IV.
galaxy: star and star (your welcome)
A star is one, a galaxy is many.
All of the constellations that we can see are actually in our own galaxy, so we can't really answer your question as it was asked. The closet star to earth other than our own sun is the star Proxima Centauri, we can tell by the name that it is in the constellation Centaurus.