Transit Of Venus: Last Chance To See This Extremely Rare Astronomical Event Until 2117
Fri 1 Jun, 2012 10:30 AM IST - Who Knew? 2:06 | 15,908 views
One of the rarest celestial events, the transit of Venus is on Tuesday. If you miss seeing the far-off planet crossing in front of the sun, you might be out of luck: it won't happen again until 2117.