Back in 1990, after significant cost overruns and delays, the Hubble Space Telescope was finally carried into orbit aboard the space shuttle. Astronomers rejoiced, but within a few weeks, elation turned to dread. Hubble wasn't able to achieve anything like the results anticipated, because, simply put, its 2.4-meter mirror was ...
题目The new Webb telescope has discovered what appear to be galaxies(星系) that date back to within 600 million years of the Big Bang.The six newly discovered objects suggest that the early universe may have been developing unexpectedly fast to produce these huge galaxies. While the...