Blood Moon: Tonight’s the night
Tonight, September 7, is a night to look up. A rare and breathtaking celestial event is set to unfold: a total lunar eclipse, popularly known as a Blood Moon. This isn’t just a show for professional astronomers; it’s a cosmic spectacle that will be visible to everyone in
Sri Lanka, offering a chance for the entire nation to share a moment of collective awe.
The science behind the Blood Moon
A Blood Moon occurs during a total lunar eclipse, when the Sun, the Earth, and the Moon align perfectly. Our planet moves directly between the Sun and the Moon, casting a shadow that completely covers it. But instead of vanishing into darkness, the Moon takes on an eerie, beautiful red glow.
This dramatic colour is the result of sunlight filtering through Earth’s atmosphere. The shorter blue wavelengths scatter away, while the longer red wavelengths bend and reach the Moon’s surface.
Legends and myths
Before science explained the eclipse, ancient cultures had their own interpretations. In Hindu and Sri Lankan folklore, it is linked to the myth of Rahu and Ketu. The immortal head of the demon Rahu is said to swallow the Sun or the Moon, causing an eclipse. But since he has no body, the Moon reappears, escaping from his severed neck.
The Incas believed a celestial jaguar was attacking the Moon, while in ancient China, people thought a dragon was devouring it. To save the Moon, communities would bang drums, pots, and pans to drive the shadow away.
Watching the eclipse in Sri Lanka
According to Professor Chandana Jayaratne, Head of the Department of Physics and Director of the Astronomy and Space Science Unit at the University of Colombo, Sri Lanka is in a prime position to witness the event in its entirety.
The eclipse will begin with the penumbral phase at 8.58 p.m., followed by the partial eclipse at 9.57 p.m. The total eclipse will start at 11. 01 p.m., reaching its maximum at 11.41 p.m. when the Moon glows in its deepest crimson. The total phase will last for about 82 minutes, before the event concludes at 2.25 a.m. on September 8.
Unlike solar eclipses, no special glasses are required. A lunar eclipse is safe to watch with the naked eye. For the best view, step outside into an open space, rooftops, beaches, or gardens away from streetlights. Binoculars or a telescope will add richer detail, but they are not essential.
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