NASA announced it will be releasing blue-green and red vapor into the night sky to form artificial clouds.
NASA says the clouds are not harmful to people, animals or the environment.
The scheduled launch of the vapors will take place between 9:04 and 9:19pm, Tonight, after it was postponed from an original launch, Monday night.
Live coverage of the mission is scheduled to begin at 8:30 p.m. on the Wallops Ustream site. A Facebook live is also planned beginning at 8:50 p.m. on www.facebook.com/NASAWFF. Launch updates also are available via the Wallops Facebook and Twitter sites.