Astronomers will have their telescopes fixed on the sun on Tuesday as a rare event takes place.
Mercury will transit the sun, an event that won't be seen again until November 13 2032.
How to see five planets all at the same time
Stargazers on earth can only see two planets transit our sun - Mercury and Venus and the opportunity to watch Mercury orbit past the sun occurs around 13 times a century.
During the transit Mercury becomes a tiny silhouette against the backdrop of the sun and to see it will require high-powered visual aids.
The transit will take around five and a half hours and the best time to see it is during the day. Watchers in New Zealand will be able to see at least part of the transition on Tuesday morning.
The east coast of North America, South America, western Europe and parts of Africa will be the best places to view the whole thing.
Mercury orbits the sun every 88 days, but because the planet's orbit is tilted compared to Earth's, it usually passes either above or below the sun from our line of sight.
Nasa uses planets transiting their suns to identify them. The Keplar mission identified over 2000 planets across the galaxy by watching them pass by their sun.
Watchers are advised to use the correct equipment and not look directly at the sun.
If you can't watch it live Nasa will be live streaming it along with Virtual Telescope.
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