Venus view: The transit of Venus will start at 1.12pm on June 8 and last around six hours.

Venus will cross the disc of the Sun at around 1pm Tuesday, and the transit will be viewable online at the Space Museum's website or the HK Observatory's website.

The live webcast will start at about 1pm and end at about 6pm. Images will be updated every minute.

During the transit, Venus will come between the Sun and the Earth for the first time in more than a century. From the Earth's perspective, Venus' silhouette will move across the sun's disc.

The last occurrence of the rare astronomical phenomenon was 122 years ago in December 1882. The next transit will occur in June 2012.

Weather permitting, most of the transit will be observable here as the sun will set at 7.09pm.

The best viewing locations should have unobstructed views to the west, such as Pok Fu Lam, Stanley, Lamma Island, Cheung Chau and Tai O.

People must not look directly at the sun with the naked eye or through a telescope or binoculars. A safe method is to project the sun's image onto a piece of white paper or cardboard and view the reflection. For more safety advice, click here.