Astronomers could not tell exactly where the moon would be from one night or day to the next.

VOA: special.2010.07.14

Scientists hope this vehicle could permit them to one day explore the icy oceans on Jupiter's moon Europa.

VOA: special.2009.06.03

President Richard Nixon gave federal government workers the day off to watch the moon landing on television.

VOA: special.2009.07.15

Then he had to seek the correct information in the Nautical Almanac about the moon and stars at that time of night or day.

VOA: special.2010.07.14

For Eleanor Creesy to learn the correct position of the ship each day, she had to be able to see the sun, the moon or stars.

VOA: special.2009.12.23

The new schedule calls for Endeavour to lift off before dawn on Wednesday, the same day that NASA had hoped to launch a separate mission to survey the moon.

VOA: standard.2009.06.16