Skygazers who missed out on January’s super blue blood moon have a good chance of watching the next celestial wonder as the eclipse will be visible for most of the world.
Europe, Africa, South America, Asia and Australia will all be able to see at least a partial eclipse – although sadly US residents will miss out this time.
A blood moon is the same name for a total lunar eclipse and gets its name from the reddish tinge the moon takes on during the full eclipse.
EarthSky’s Bruce McClure says next month’s eclipse will offer skywatchers one hour and 43 minutes of totality, compared to the previous on January 31, which lasted one hour and 16 minutes.
When is the next blood moon?
Get your diary at the ready – the next blood moon of 2018 is on Friday, July 27.
In the UK, the partial eclipse starts at 7.24pm BST, before the total eclipse begins at 8.30pm.
The peak of the eclipse will happen at 9.22pm, followed by the finish of the total eclipse at 10.13pm and close of the partial one at 11.19pm.
The best viewing opportunities will be around midnight Local time for Madagascar and the Middle East.
Why are blood moons red?
A blood moon happens when the earth comes between the sun and the moon, blocking any direct sunlight from reaching the moon.
Some sunlight will still reach the moon’s surface indirectly, refracted by the Earth’s atmosphere, but some of the colours are filtered out.
As red wavelengths are the least affected, this makes the moon appear to have a reddish glow.
Known as Rayleigh Scattering, the event is also the reason why we have red sunrises and sunsets.
Why is July’s lunar eclipse so long?
Next month’s eclipse will be especially long because the moon will pass almost directly through the middle of the Earth’s shadow.
Coupled with that is the July lunar apogee when the moon is at its most distance point from the Earth in the month.
According to EarthSky.org, this means “this smaller and slower-moving full moon takes more time to cross the Earth’s shadow than does a full moon that’s closer to Earth and moving faster in orbit.
“That’s why a full moon at or near lunar apogee adds to the duration of a total lunar eclipse.”
READ MORE: How to photograph full moons
Source : EXPRESS