A star, sometimes called a sun, is a celestial body which is orbited by planets in Star systems. A star is a fusion of hydrogen and various other elements, which are incredibly hot and bright.
In an attempt to destroy Apophis's fleet, SG-1 launched a Stargate which had dialed P3W-451 into the sun orbiting Vorash, causing it to lose some of its mass and supernova. (SG1: "Exodus")
A neutron star was capable of disrupting the systems on the Odyssey. It is currently unknown if the Asgard improvements are capable of countering this effect. (SG1: "Company of Thieves", "Unending")
On ancient Earth, many cultures worshiped the sun as a god, and many of the Goa'uld impersonated sun gods, including Ra and Amaterasu.
powers itself from the intense energy of a star's corona
. It prefers red dwarfs
, but can recharge from other types of stars. (SGU