1.   Some astronomers have used these data to suggest that our solar system is unusual.

2.   Astronomers have used it to estimate what faraway stars look like.

3.   Astronomers use the network to send huge data sets from telescopes and to manipulate those faraway telescopes.

4.   Astronomers use red shifts to figure out the distance of objects from Earth and thus their age.

5.   Astronomers used the sessions to observe what happens to a comet as it races toward the distant recesses of the solar system.

6.   At the same time, other astronomers could be using the telescope for non-SETI observations.

7.   For that research, astronomers used both the Hubble and the Very Large Array radio telescope near Magdalena, N.M.

8.   For the observations in the last five years, the astronomers used telescopes in California, the Canary Islands and Chile.

9.   For their research, the astronomers used data from galaxies at a distance of two billion to three billion light-years from Earth.

10.   In both cases, astronomers used the orbiting Hubble telescope to record the periodic fluctuations in brightness of stars known as Cepheid variables.