VOA慢速英语:Possible Earth-Like Planet Next Door?

exoplanet – n. a planet that orbits a star other than our sun

galaxy – n. any one of a very large group of stars that make up our universe

guess – n. an opinion or answer on something you do not know much about

astounding – adj. causing a feeling of great surprise or wonder

concrete – adj. solid, like the hard strong material of concrete

wobble – n. a very small movement

habitable – adj. something than can support life