Planet watchers with a clear view to the west-southwest can find Venus and Mercury tonight through next week. Venus is much brighter and easier to see and located about five degrees (three fingers ...

Four naked-eye planets will appear in line, showing solar system’s plane This week we can observe four of the five naked-eye planets (Venus, Mars, Jupiter and Saturn, but not Mercury) with the added ...

Of the imaginary coordinate lines that astronomers and navigators use in mapping the sky, perhaps the most important one is the ecliptic, the apparent path the sun appears to take through the sky as a ...