Mysterious bright fireball seen moving across skies above parts of Nevada, California, December 22, 2015

Dozens of people from Las Vegas to Northern California posted videos on social media Tuesday night of a bright light moving across the sky.

Some videos also apparently show what appears to be pieces of the object breaking up as it swoops across the sky. 

@FOX5Vegas Captured an amazing meteor in Las Vegas around 6pm tonight! Saw it breaking up as it fell to earth! pic.twitter.com/xK2ObyL5o9

— BA®®Y™ (@SteeleSoldier) December 23, 2015

The object was also seen flying across California.

@KTLA so this just happened in Ventura.... #ufo pic.twitter.com/hLT8dUVX1G

— Kolbe Gillette (@TheRealKolbabe) December 23, 2015

Not everyone was convinced the flying object was a meteor, however, with Twitter users speculating that it could have been a secret alien visit or military weaponry.

Missile in the Nevada desert? pic.twitter.com/Zh7XPeXkcr

— Jane Ross (@cjrorun) December 23, 2015

According to Sott.net website, local outlet KSNV reported that McArran airport confirmed the object was not an aircraft since it was too high in the sky.
Other than a meteor, Twitter users and experts speculated that the object could have been falling space debris.
Some on Twitter agreed, arguing it was moving too slowly to be a meteor.