VOA慢速英语:天文学家发现第一颗恒星的证据

dark matter – n. material yet to be observed by astronomers, but something they think exists in the universe because of observed gravitational effects

antenna - n. a device for sending or receiving radio or television signals

deserve – v. to have earned because of something

wavelength – n. the distance from one wave of energy to another as it is traveling from point to point

ultraviolet – n. used to describe light that cannot be seen and that has shorter wavelengths than violet light

specific – adj. special; exactly stated

frequency – n. the number of waves of sound or energy that pass by a point every second

absolute zero – n. the temperature that is believed to be the lowest possible temperature

signature – n. an identifying mark or quality