The smallest planet in the solar system is now in the midst of a five-and-a-half hour transit of the sun. From the above image, we can see a tiny black dot, that's Mercury in comparison to the size of the Sun. The next two transits will take place in 2032 and 2039, but these will not be visible from North America. Park entry fees apply.
The President of the Royal Astronomical Society, Professor Mike Cruise was quoted by DailyMail to have said: "Transits are a visible demonstration of how the planets move around the Sun, and everyone with access to the right equipment should take a look".
Although you have to squint a bit to see the planet, we do love the pretty green effect that welder's glass - used as a filter - created in this photo by Flickr user fdecomite.
'That's really close to the limit of what you can see, ' he said earlier this week.
You can see the full range of Mercury transit images on NASA's website here. Venus, on the other hand, has a more peculiar transit pattern.
Earthlings can safely watch Mercury transit from the comfort of their own homes via various live-streams online, including a YouTube stream from the Griffith Observatory in Los Angeles, which begins at 9:15 a.m. EST.
Most of the world caught only a small sliver of the transit.
Today (November 11) astronomers predicted Mercury will fly across the Sun from about 12.35pm GMT and wrap up around 4.15pm GMT here in the UK. Intermittent, passing plunges of starlight show a circling planet.