New Delhi, Sept. 20 -- A rare celestial event is about to unfold, but Americans will not be able to catch it live. A partial solar eclipse will grace the skies on Sunday, September 21, but only viewers in the Southern Hemisphere will see the moon slip in front of the sun. Here's all you need to know.

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According to a report by USA Today, the eclipse will be visible across Australia, New Zealand, Antarctica, and nearby oceans. Around 16 million people, just 0.2 per cent of the Earth's population, fall within its path. For those in the United States, the event will only be accessible online through live streams and astronomy website...