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A deep partial lunar eclipse occurred on 28 August 2026, with greatest eclipse at 04:12 UTC (09:42 IST) and about 96% of the Moon's disc inside Earth's umbra.
Its umbral magnitude was 0.932, meaning roughly 93% of the Moon's diameter was covered - deep enough to look almost total, but not a total eclipse.
The eclipse was not visible from India: the Moon was below the horizon over the country through the umbral phases, which fell in Indian daytime.
It was fully visible across North and South America and was seen setting over western Europe and western Africa.
It was the lunar half of the eclipse season that also produced the total solar eclipse of 12 August 2026 over eastern Greenland, Iceland and northern Spain.
Earth casts a two-part shadow into space. The umbra is the dark inner cone from which the Sun is completely blocked; the penumbra is the lighter outer cone from which only part of the Sun is hidden. A lunar eclipse is classified by how far the Moon penetrates this shadow: total (the whole Moon inside the umbra), partial (only part of the Moon inside the umbra), or penumbral (the Moon passes only through the outer penumbra and merely dims, often imperceptibly). Eclipses can happen only when Sun, Earth and Moon are nearly in line, so a lunar eclipse always falls on a full moon and a solar eclipse always on a new moon. They do not happen every month because the Moon's orbit is tilted about 5 degrees to the plane of Earth's orbit, and the alignment is close enough only when a full or new moon coincides with a lunar node. That is why eclipses arrive in seasons, with a solar eclipse roughly a fortnight before or after a lunar one. The shadowed part of the Moon glows red rather than going black because Earth's atmosphere scatters short blue wavelengths away and refracts longer red and orange wavelengths into the umbra - the same physics that reddens a sunrise, projected onto the Moon.
Simple Analogy: Stand under a floodlight and your shadow has a hard black core and a soft grey fringe. The Moon crossing the black core gives a partial or total eclipse; grazing only the grey fringe gives a penumbral one you can barely notice.
| Type | What the Moon passes through | What an observer sees |
|---|---|---|
| Total | The entire Moon enters the umbra | The Moon is fully shadowed and can turn coppery red |
| Partial | Only part of the Moon enters the umbra | A dark bite out of the disc; the rest stays brightly lit |
| Penumbral | The Moon passes only through the lighter penumbra | A slight dimming that is often hard to notice at all |
GS Paper 1 > Physical Geography > Earth-Sun-Moon system; Prelims General Science
General Awareness > Geography and General Science
General Awareness > Basic Science
The term 'Goldilocks Zone' is often seen in the news in the context of
Answer: search for the Earth-like planets in outer space
What is the purpose of 'evolved Laser Interferometer Space Antenna (ELISA)' project?
Answer: To detect gravitational waves
"The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilometres long, with lasers shining between the craft." The experiment in question refers to
Answer: Evolved LISA
The dark inner cone of Earth's shadow from which sunlight is completely blocked.
The lighter outer part of Earth's shadow where only part of the Sun is blocked.
The fraction of the Moon's diameter covered by the umbra at greatest eclipse; 0.9319 on 28 August 2026.
A period of about 18 years and 11 days after which a nearly identical eclipse recurs; this eclipse was member 29 of Saros 138.
A point where the Moon's tilted orbit crosses the plane of Earth's orbit; eclipses occur only when a full or new moon falls near a node.