Skywatchers in Hawaii will have a choice view of a one in a lifetime celestial phenomenon — the so-called “transit of Venus.” 

Over the course of about six and a half hours on Tuesday afternoon, the planet will glide across the sun. The next such transit won’t happen for another 105 years.

Huffington Post reports:

Skygazers who want the full experience are flocking to Hawaii, considered one of the prime viewing spots since the whole transit will be visible. From the world-famous Waikiki Beach on Oahu to the summit of Mauna Kea on the Big Island, eclipse glasses will be passed out so that people can safely see Venus crossing without damaging their eyes.

Just remember to have patience.

“There’s no one big climactic moment. It takes longer to happen” than a solar or lunar eclipse, said Larry O’Hanlon, who does outreach at the W.M. Keck Observatory on the Big Island.

Here are some tips for how to safely watch the event. (hint: don’t stare straight into the sun)