Why tonight's lunar eclipse moon is called blood moon???

 Tonight is the last lunar eclipse of the year 2025.

Lunar eclipse happens only on FULL MOON DAY. 

Lunar eclipse happens on full moon day. 

But not on every full moon day   !!! 

When Earth comes between Sun and moon that means all of them are in straight line,  lunar eclipse happens. 

As Earth comes between Sun and moon,  Earth blocks the sunlight falling on moon. 

At this time, some of the sunlight do fall on moon as Sun is larger than Earth. 

But these sunlight has to pass through Earth's atmosphere first before falling on moon. 

That time ultra violet rays before falling on moon gets refracted. 

Shorter blue wavelength of sunlight scattes away and longer red wavelength of sunrays enter moon's surface. 

MOON APPEARS   RED    !!!