VOA慢速英语:阿罗科思：有史以来最遥远的太空物体

dwarf – adj. smaller than normal size

solar system – n. our sun and the planets that move around it

building blocks – n. an important part that is grouped together with many other similar things to form something larger — usually plural

nebula – n. a group of stars that are very far away and look like a bright cloud at night

disk – n. a flat, thin, round object

thrilling – adj. very exciting

author – n. a writer

passionate – adj. filled with emotion