Task: Analyze the tweet's sentiment and assign it to either 'neutral or no emotion' or one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Tiangong 1, China's first space laboratory, will come to a fiery end in late 2017. The average decommissioned satellite either burns ...
This tweet contains emotions: 