Mercury makes rare move across the sun

Although Mercury orbits the sun every 88 days, Earth, the sun and Mercury rarely align - and Mercury usually moves above or below our line of sight to the sun. The Mercury is seen as a small black dot moving across the face of the sun. About four hours later, Mercury reaches what's called the transit midpoint, which is halfway across the face of the sun. It will next happen in 2019, and then in 2032.

Protect your eyes! Do not look straight at the sun to view this event; you can permanently damage your retinas. Mercury's journey can also be seen on NASA's website, where it will be livestreamed.

Almost everywhere on the globe with the exception of Australia, New Zealand, Indonesia, the Philippines, and a small area of eastern Asia, will be able see Mercury's transit.

The 2016 Mercury transit will occur between about 7:12 a.m. and 2:42 p.m. EDT says NASA, who will provide live coverage of the Mercury Transit.

Check out NASA's video on the Transit of Mercury. "People used it to figure out the distance between the earth and the sun", she said.

"You may be tempted to look directly at the sun - but it is very important that you don't do so, as this will put your eyesight at risk". The transit is less likely to be witnessed easily in India as most of the event will occur after sundown. It takes place when the planet Mercury comes between the Sun and Earth.

NASA scientists are viewing the transit through many specialized telescopes from their Solar and Heliospheric Observatory (SOHO) and the Solar Dynamics Observatory (SDO), along with the Japan Aerospace Exploration Agency-led Hinode solar mission.

A woman watches through specially secured binoculars as planet Mercury passes against the sun in a rare astronomical occurrence in front of the Copernicus Science Center in Warsaw, Poland, Monday, May 9, 2016.

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