Don't Miss The Rare Transit Of Mercury On November 11, 2019


CCSS NAS-4 375 Words 3-Minute Listen
An image of the 2012 Mercury transit taken by NASA's Solar Observatory Spacecraft (Credit: NASA/SDO, AIA//CC BY 2.0 /

On Monday, November 11, 2019, stargazers will be treated to an unusual sight: our solar system's smallest planet, Mercury, passing between the Earth and the Sun. The rare event, called a transit, will be the fourth of just 14 transits of Mercury that will occur during the 21st century. The last one took place on May 8, 2016, and the next will not occur until November 13, 2032. However, it will not be visible from North America, which means the continent's residents will have to wait until May 7, 2049, to observe the celestial delight again.

The transits are a rare event due to Mercury 's eccentric orbit around the sun and its incline to Earth's plane (Credit:

Though Mercury speeds around the Sun every 88 days, it has a highly eccentric orbit that takes it as close as 29 million miles (47 million km) and as far away as 43 million miles (70 million km) from the star. The planet's orbit is also inclined 7 degrees to the plane of the Earth's orbit. The combination of these factors means that the Earth, the sun, and Mercury do not align very often, making transits rare.

The 2019 transit will be visible from most parts of the Earth (Credit: Sky & Telescope)

The planet's 5.5-hour journey in front of the Sun will begin at 4:35 a.m. Pacific Time. However, even those on the US West Coast will have to wait for the sun to rise to view it. The transit will end after sunset for those living in Europe, Africa, western Asia, and the Middle East. Though visible from most parts of the Earth, only residents of eastern North America, Central and South America, southern Greenland, and part of West Africa will be able to view the transit from start to finish.

Mercury, which will be at its closest point to the Sun and farthest point from the Earth, will appear as a black dot on the star's surface. Measuring just about 0.5% of the Sun's diameter, the planet will only be visible through powerful telescopes with a minimum magnification of 50x. Viewers are also required to use special solar filters to protect their eyes from the Sun's harmful ultraviolet rays. Alternatively, experts recommend using the telescope to project the star's image onto a white card or screen. "Because Mercury is so small from our perspective on Earth, you'll need binoculars or a telescope with a sun filter to see it," says NASA.


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  • qertyuiop
    qertyuiopWednesday, February 19, 2020 at 6:08 am
    • x_ashley_x
      x_ashley_xSunday, December 15, 2019 at 7:10 pm
      I MISSED IT DARN IT!!!!!!
      • jkbear
        jkbearMonday, November 30, 2020 at 2:09 pm
        cuz I missed it too
        • jkbear
          jkbearMonday, November 30, 2020 at 2:08 pm
          that's just sad
        • leodawhitetiger
          leodawhitetigerWednesday, December 11, 2019 at 9:40 am
          IM SORRY ABOUT YOUR LOSS OF time sry caps lock
          • moomy2
            moomy2Tuesday, December 10, 2019 at 7:33 am
            But it sas cool
            • cool_chick2000
              cool_chick2000Saturday, December 7, 2019 at 12:28 pm
              • ap3x129
                ap3x129Friday, December 6, 2019 at 11:58 am
                COME ON I MISSED IT!?!?!?!
                • xxdancer5
                  xxdancer5Monday, December 2, 2019 at 12:56 pm
                  wow this is so cool i didn't get the chance to experience this but i'm glad this gave me an idea on what it looks like in real life thank you so much for giving me this opportunity!!
                  • kgowda
                    kgowdaFriday, November 29, 2019 at 6:31 pm
                    I'm glad I can see this rare occasion☺
                    • dragon_queenfox
                      dragon_queenfoxFriday, November 22, 2019 at 6:04 am
                      it was so cool i have a picter of it
                      • cool_chick2000
                        cool_chick2000Saturday, December 7, 2019 at 12:29 pm
                        well I MISSED IT
                      • ryfojijo-157425689274
                        ryfojijo-157425689274Thursday, November 21, 2019 at 7:21 am
                        i love space