1.   Astronomers recently learned that these bursts originated at extragalactic distances, but they were surprised by how far away was the source of this burst.

2.   Aspiring astronomers can also learn more about the universe by attending free monthly lectures hosted by Valley College and JPL.

3.   Astronomers have learned there are stupendous collections of superclusters.

4.   But with ingenuity, astronomers have learned a lot just by staring intently at the point of light.

5.   Early in this century, astronomers learned that the intrinsic brightness of these stars is related to rhythmic changes in their observed luminosity.

6.   It is worth getting to learn about astronomy while learning how astronomers learn.

7.   Still, astronomers have learned little about the nature of these exoplanets.

8.   The radio telescope translates them into images or graphs that let astronomers learn about unseen objects in the distant universe.

9.   Both of these also will be viewed by the three ultraviolet telescopes aboard Endeavour so astronomers can learn more about the life cycle of stars.

n. + learn >>共 1054
child 8.33%
student 6.48%
people 4.39%
official 2.52%
kid 1.97%
company 1.82%
scientist 1.77%
team 1.31%
police 1.31%
authority 1.28%
astronomer 0.15%
astronomer + v. >>共 242
say 12.35%
be 7.04%
believe 4.66%
have 3.36%
think 3.14%
find 3.03%
hope 2.82%
use 2.71%
see 2.38%
know 2.17%
learn 0.98%
每页显示:    共 9