On Tuesday, July 2 a total solar eclipse will take place as the Moon crosses in front of the Sun. This will temporarily plunge the sky into darkness as the Sun’s rays are blocked by the celestial orb. This is taking place along a 100-mile-wide path arching across Chile and Argentina.
For those unable to see the eclipse in person, the San Francisco Exploratorium will be live streaming the event.
The Exploratorium’s stream will begin at 1pm PDT (9pm BST) and will conclude at 2pm PDT (10pm BST).
The solar eclipse will be visible over a 125-mile (200km) wide path which spans from coast to coast across Chile and Argentina.
However, the maximum time of four minutes and 33 seconds may be visible only to observers on boats and aeroplanes, as it will be happening over the Pacific Ocean.
Countries nearby such as Brazil, Paraguay, Uruguay and Ecuador will be able to witness a partial eclipse, as only part of the Sun will be blocked.
Totality will first make landfall over Oeno Island, a British territory in the South Pacific Ocean, at 10.24am local time (7.24pm BST).
It will reach the coast of Chile near the city of La Serena at 4:39pm local time (8.39pm BST).
It will skim over Cordoba and Buenos Aires, Argentina, as well as Montevideo, Uruguay, passing just south of these three cities before heading back out to the Atlantic Ocean just before sunset at 5.40pm local time (9.40pm BST).
The Exploratorium is sending a team to NSF’s Cerro Tololo Inter-American Observatory in Chile, in the path of totality.
They will film the lunar phenomenon live and broadcast it to hundreds of countries and millions of people around the world.
You can watch the live streams of the eclipse on the Exploratorium website https://www.exploratorium.edu/video/total-solar-eclipse-live-july-2-2019 and on their free Android and iOS apps.
This is the only total solar eclipse to be taking place in 2019.
Also streaming the event is the European Southern Observatory (ESO) which will switch between three telescopes.
Should there be bad weather this broadcast could be impaired, but currently there is a 40 percent chance of a clear sky.
The ESO webcast will begin at 3.15pm EDT (8.15 BST), which is one hour and 24 minutes before totality occurs.
You can watch it live on their site here or on YouTube.
Website Slooh will also be broadcasting the eclipse live, with commentary by astrophysicist Paige Godfrey via Slooh’s telescope partners in Chile.
However, this live stream is only available via Slooh’s paid membership, which begins at £3.91 ($4.95) per month.