Australians will be treated to a rare triple treat with three lunar events expected by the end of the year.

Stargazers will get the opportunity to view the moon at its biggest and brightest in what is known as a Supermoon.

Macquarie University astrophysicist Professor Devika Kamath said the moon could appear up to 14 per cent larger and 30 per cent brighter.

"The moon is one of the largest objects in our sky," Professor Kamath said.

"Now, imagine that looking 14 per cent larger and about 30 per cent brighter when you're looking at a full moon."

Supermoons themselves aren't rare, occurring three to four times a year, however, this year marks a special occasion.

The next Supermoon, which will occur on October 7, will be the first in what Professor Kamath called a "rare trio" of three

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