Hence, a telescope that could magnify with at least 50 power will be needed to see it. Do not look directly at the Sun without a solar filter'. The planet Mercury will appear as a tiny, circular silhouette on the face of the sun as it undergoes an nearly flawless syzygy with the sun and Earth.
How much of the transit you will be able to see will depend on when the sun sets at your location, which will be later for more westerly regions.
As Mercury and Venus lie within the orbit of the earth, they sometimes come exactly between us and the sun, and can be seen crossing the face of the sun for the duration of a few hours.
Those looking towards the sun on Monday may notice a tiny black disc moving across the glowing orb in a rare celestial event.
The previous Mercury transit took place in May 2016, with the next one not taking place until 2032 - so don't miss out this year, Thanz said.
It wrote: 'With the proper safety equipment, viewers almost everywhere on Earth will be able to see a tiny dark spot moving slowly across the disk of the Sun. According to NASA, spectators need to see binoculars or telescope with a Sun filter to witness the phenomenon as Mercury is so small from our perspective on Earth.
Mercury crossing the face of the sun. The safest way to enjoy this event is to reach out to your local astronomy group or club to see if they are organizing any viewing parties. Wearing solar filters, such as solar eclipse glasses and looking into the eyepiece of a telescope that is fit on a screen of its own, can still lead to irreversible eye damage.
The 20-inch Meade RCX 400 telescope, housed at the Ross School on 20 Goodfriend Drive next to the tennis courts, is the largest telescope in a public observatory on Long Island, from which guests will be able to view the astronomical event.
This can attain the centre at about 3.19pm earlier than ending its wander at 6.04pm.