A glowing red 'Blood Moon' in July will be the longest lunar eclipse in a century — here's how to see it

Matt Cardy/Getty Images
  • A blood moon – and the longest lunar eclipse of the 21st century – will occur on the morning of July 28.
  • The total eclipse is set to last for 1 hour and 43 minutes.
  • The eclipse will only be visible in the Eastern Hemisphere.

July is shaping up to be an excellent month for astronomy fans.

In the early morning of July 28, skywatchers in the Eastern Hemisphere will be treated to the longest lunar eclipse set to occur in the 21st century, EarthSky reports.

Astronomers expect the total eclipse to last for a full 1 hour and 43 minutes, with the partial eclipse – which occurs before and after the total eclipse phase – lasting for 3 hours and 55 minutes.

A lunar eclipse occurs when the Sun, Earth, and Moon are directly aligned, and the moon’s orbit brings it directly into Earth’s shadow. This particular eclipse will last so long because the moon will pass directly into the darkest region of Earth’s shadow, known as the umbra, which will also give the moon a reddish “blood moon” sheen.

July’s full moon will happen at the same time as the moon’s apogee – which is when the moon hits its furthest point from Earth in its monthly orbit, according to EarthSky. It will be the smallest and furthest full moon of the year, which means the moon will take more time to pass through Earth’s dark shadow, making the eclipse last longer.

The longest possible lunar eclipse is 1 hour and 47 minutes, according to EarthSky.
Here’s when to catch it in Australia (times in AEST):

  • 3.14am: The penumbral eclipse begins when the Earth’s penumbra starts to touch the moon
  • 5.30am: The total eclipse can be seen when the moon is fully red
  • 6.21am: Maximum eclipse
  • 7.13am: Total eclipse ends and moon will set in the west-southwest

Just a few days after the lunar eclipse, Mars will pass by Earth at its closest point to since 2003. On July 31, the red planet will be only 35.8 million miles away from Earth, making it clearly visible to the naked eye.

Stargazers in the Eastern Hemisphere will easily be able to see both Mars and the blood moon on July 28 and 29.

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