61.   By looking very, very deep into the universe, the astronomers were able to measure the rate of expansion early in the universe history.

62.   Ever since, astronomers have been wary of predicting a spectacular sky show.

63.   Romero said the Cambridge astronomers are pioneers in the cutting-edge telescope technology that will be used at Magdalena Ridge.

64.   The object is so close to Earth that astronomers will be able to closely monitor each step in its evolution.

65.   Astronomers are unable to explain the source of the emissions, and are equally puzzled by rapid changes and strength in the X-rays coming from the comet.