1.   They were so-named two centuries ago because they resembled planets when viewed through the much less powerful telescopes of the time.

2.   ...a telescope so powerful that it can show up galaxies billions of light years away.

3.   Although Upsilon Andromedae is a nearby bright star visible to the unaided eye, the three planets cannot be seen even with the most powerful telescopes.

4.   An amateur astronomer pointed his powerful telescope at the lights and said he saw airplanes.

5.   Astronomers watching the crash-landing site with powerful telescopes on the ground and in space hope to detect a cloud of water vapor.

6.   Asteroids are usually seen only as distant points of light, even in powerful telescopes.

7.   If astronomers trained their most powerful telescope on the moon today, the smallest feature they could see would be something the size of a football field.

8.   Immediately, the most powerful X-ray telescope ever built was able to produce a dazzling image that revealed wispy details never seen in earlier pictures.

9.   In recent years, with much more powerful telescopes, planets have been spotted in distant universes.

10.   Its most powerful telescope can see quasars, the most distant known objects in the universe.