1.   Astronomers take into account the gravitational pull of the sun and the individual planets during the time the comet is within the orbit of Neptune.

2.   Astronomers take images of the same part of the sky over several minutes and then compare them.

3.   Astronomers now take the entire electromagnetic spectrum into account, not just visible light.

4.   Astronomers then took spectroscopic readings that showed the presence of cesium, proving that the object was not a red giant.

5.   .com. Amateur astronomers take note.

6.   For the first time, astronomers have taken clear pictures of the infant universe.

7.   No sooner had astronomers taken a look at a low-mass star than they found it had a planetary companion.

8.   To get as much brainpower as possible behind the problem, the astronomers have taken the unusual step of making the Hubble data available to scientists around the world.

9.   To avoid such monochromaticity, astronomers took separate pictures of the Eagle through different filters.