A balloon attracted the attention of the public Friday while flying near Denver. The large, white balloon was spotted flying at high altitude near Longmont Friday morning. The balloon is part of the Stratollite high-altitude balloon systems, according to World View Enterprises. The company said the balloon is carrying a payload for NASA that is measuring solar radiation in the stratosphere above the 40th parallel for up to two weeks. The company said the balloon was launched from northern Arizona last Saturday. READ MORE: https://www.9news.com/article/news/local/weather-balloon-longmont-boulder/73-1b72e1a4-ff9f-4b23-a3a4-f24d9c6b2a5a More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: http://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.