The year’s second total lunar eclipse is approaching this weekend, and coinciding with a full moon. Total lunar eclipseBig picture view:As NASA explains it , during a total lunar eclipse, the earth lines up between the moon and the sun, hiding the moon from sunlight. FILE - A blood moon lights up the sky during the total lunar eclipse on March 14, 2025 in Ontario, Canada. RELATED: September skygazing guide: Saturn shines bright, Corn Moon and Autumnal equinoxFull blood moonBig picture view:This month’s full moon is the Corn Moon, but you may still see it being referred to as a blood moon. That’s because of the eclipse; a so-called blood moon occurs during a total lunar eclipse because it appears with a reddish hue.