Its core is 500 miles across and the tail could stretch for between 100 and 150 miles before disappearing, it was discovered back September 2012.
Unlike other comets, this time, the comet may become bright enough to glimpse just by holding up a hand to block the sun’s glare.
It is set to skim just 730,000 miles (1.2 million kilometers) above the surface of the sun on Thanksgiving Day (Nov. 28). The comet has brightened considerably as it has zoomed closer and closer to the sun in recent weeks.
Live countdown clock here and source of photo
Before beginning its long fall toward the sun, the comet resided in the Oort comet cloud, a vast shell of perhaps a trillion icy bodies that extends from the outer reaches of the planetary system to about a third of the distance to the star nearest the sun.
Following ISON’s encounter with the sun, the comet will depart the sun and move toward Earth, appearing in evening twilight through December. The comet will swing past Earth on Dec. 26, approaching within 39.9 million miles (64.2 million km) or about 167 times farther than the moon.
I hope everyone gets a good clear sky so that you can see it.