About Mercury Transit 2019


Watch as the innermost planet, Mercury, appears to glide silently across the disk of the Sun on November 11, 2019. Known as a transit, this is a special celestial event you don’t want to miss!

We get to see the passage of planets in front of the sun only when they are aligned perfectly between the Earth and the sun. However, from our vantage point here on Earth we can only see transits of Mercury and Venus since these are the only two neighbouring worlds that have orbits that hug the sun tighter than Earth.
As a result, during a transit skywatchers on Earth get to see a small black dot travel across the face of the Sun.

Create an event and take your telescope out with friends, family, or your local astronomy club.

Mercury is very small compared to the Sun (only 1/158 of its apparent diameter), so viewing with a solar telescope is recommended. A telescope with at least 50x magnification capability is all that is needed to pick out the small, black dot-like appearance of Mercury.

*CAUTION: Looking at the Sun directly or through a telescope without proper protection can lead to serious and permanent vision damage. Do not look directly at the Sun without a solar filter.

Post a Member Report about this Program

Share your activities with others around the world by posting a Member Report for the worldwide astronomy community to see! Your reports help Astronomers Without Borders show sponsors how successful our programs are, too!

Program Goals

  • Reach out to show and share the wondrous sight of a Mercury Transit
  • Celebrate the last Mercury transit visible anywhere on Earth until the year 2032!

Register and get a chance to win a Mercury Globe, courtesy of Sky & Telescope!

MercGlobeRegister your event so others know where to find you, and earn a personalized participation certificate and a chance to win a Mercury Globe, courtesy of Sky & Telescope. Read more about the Mercury Globe

Your event will also be featured on the AWB world map.

Together we’ll make Mercury Transits the Sun a HUGE success.

It's all about sharing!

Have visitors take their pictures the Mercury Transit, the "star" of the event. Project a live image of the transit on a wall from a telescope if you can. Project a photo of the transit from a computer. Print a photo and tape it up. Make a banner of the event. Be creative! Create a "Photo Booth" for photos of your visitors with the transit as a souvenir of this historic event.

Share your photos from this exciting event with us and the world on Facebook, or Tweet using #OnePeopleOneTransit hashtag

What: Show the Mercury transit to everyone so that they can share in viewing this rare celestial event.

When: November 11, 2019
Mercury crosses the edge of the Sun and into view at 7:36 a.m Eastern Standard Time (EST) or 12:36 Universal Time (UT). The planet will slowly make its way across the face of the sun, reaching mid-point at approximately 1:04 p.m. EST (18:04 Universal Time), and finally leaving the solar disk at 2:42 p.m. The entire 5.5-hour path across the sun will be visible across the Eastern North America. South America and far-western Africa.

Where: The transit will be observable across the Americas, the Atlantic and Pacific Oceans, New Zealand, Europe, Africa and western Asia. Unfortunately anyone in central and eastern Asia, Japan, Indonesia, and Australia will miss the entire event. Here's a map