Astronomers Still Look to Hubble Space Telescope - Luyện nghe tiếng anh
Nếu không xem được bạn bấm vào đây để tải video và phát âm về The Hubble Space Telescope continues to make valuable discoveries after more than twenty years in orbit around Earth. Hubble recently showed a fourth moon orbiting Pluto. Astronomers temporarily named it P4. The moon is the smallest to be discovered around the icy dwarf planet. Astronomers estimate that the moon is from thirteen to thirty-four kilometers across. They first saw it in a Hubble photo taken on June twenty-eighth. The American space agency NASA launched the Hubble Space Telescope in nineteen ninety. Reaching that day took years of work. Ed Weiler is NASA’s chief astronomer. Mr. Weiler has worked closely with the Hubble program since nineteen seventy-nine. ED WEILER: “The Hubble, when it was launched, represented an increase in capability of other telescopes on the ground by a factor of ten. The last time in human history in astronomy that we leaped a factor of ten, in one step, was when Galileo ...