21.   Based on decades of indirect evidence, astronomers are all but certain that dark matter makes up the vast majority of all matter in the universe.

22.   About the only thing that has not astonished astronomers is the discovery itself of another planetary system.

23.   But astronomers are eager to see how well the adaptive optics system works, Wilcots said.

24.   But in recent weeks, astronomers have been partly agog over rumors that planetary catalogers were plotting to send Pluto back to the minor leagues.

25.   But in recent weeks astronomers have been partially agog over rumors that planetary cataloguers were plotting to send Pluto back down to the minor leagues.

26.   But the astronomers are optimistic.

27.   But what astronomers cannot be sure of is the absolute distance from Earth to any very remote object.

28.   Early in the next decade, astronomers may literally be able to observe any successors to the first human on the moon as they carry out their explorations.

29.   Few astronomers were entirely happy about the agreement, and similar agreements have yet to be reached between Motorola and observatories in Europe and Asia.

30.   If the astronomers have been fortunate to catch the supernova still on the rise, its light brightens to a peak a few days after it is first detected.