If you were looking up just after sunset this week, you may have caught a glimpse of Venus setting just after the sun, weather permitting. But try it again at the same time next week, and Venus will be gone. On Saturday (Jan. 11), Venus will pass between Earth and the sun, an event scientists call an "inferior conjunction." A conjunction occurs when two celestial objects reach the same longitude and appear to line up. The last time we had an inferior conjunction of Venus and the sun was on June 6, 2012.