Short answer
During a solar eclipse, the Moon moves between Earth and the Sun, blocking sunlight for some observers on Earth. During a lunar eclipse, Earth moves between the Sun and Moon, so Earth’s shadow darkens the Moon. The eclipsed object in the name tells you which appearance changes for an Earth observer. 1 2
Different alignments of the same three bodies; the shadow falls on Earth for a solar eclipse and on the Moon for a lunar eclipse.
On this page
At a glance
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| Question | Solar eclipse | Lunar eclipse |
|---|---|---|
| Alignment | Sun–Moon–Earth | Sun–Earth–Moon |
| Moon phase | New moon | Full moon |
| Shadow effect | Moon’s shadow reaches Earth | Earth’s shadow reaches Moon |
The table summarizes the cited definitions and the article’s stated scope. 1 2
What each thing is
Solar eclipse. An event in which the Moon passes between Earth and Sun and blocks some sunlight from observers on Earth. 1
Lunar eclipse. An event in which Earth lies between Sun and Moon and Earth’s shadow falls on the Moon. 2
Key differences
A solar eclipse is visible only along a comparatively limited path on Earth, while a lunar eclipse can be seen across much of the nighttime side where the Moon is up. Neither happens every new or full moon because the Moon’s orbit is tilted relative to Earth’s orbit. 1 2
For a solar eclipse, the Moon blocks the Sun from the perspective of particular places on Earth, and the Moon’s shadow sweeps over a narrow terrestrial region. For a lunar eclipse, Earth casts a shadow toward the Moon, so many people on the nighttime half of Earth can observe the same lunar event. 1 2
How to tell them apart
Look at what is obscured: darkening of the Sun from Earth is solar; darkening or reddening of the Moon is lunar. Check alignment rather than assuming that any dark sky event is an eclipse. 1 2
Where they overlap
Both require the Sun, Earth and Moon to line up sufficiently for one body to cast a shadow on another. 1 2
Edge cases
There are partial, total and other eclipse forms; the basic names do not specify completeness. Solar eclipses also vary by observer location; even a total eclipse is only total inside its path. 1 2
The Moon crosses the plane of Earth’s orbit only near two nodes. Most new and full moons occur with the bodies offset enough that no eclipse is seen. “New moon means solar eclipse” and “full moon means lunar eclipse” are therefore statements of necessary phase, not a schedule of every lunar month. 1 2
Why the distinction exists
The distinction encodes which body appears eclipsed and the geometry of the shadow. It also explains why they occur at different lunar phases. 1 2
Common misconceptions
A lunar eclipse is not the Moon covering the Sun, and a solar eclipse does not occur at full moon. 1 2
Examples
If the Moon’s shadow crosses part of North America, observers in its path see a solar eclipse. When Earth’s shadow falls across a full Moon, nighttime observers see a lunar eclipse. 1 2
Sources
Sources checked October 3, 2026.
- NASA Science — Why Do Eclipses Happen?. Eclipse geometry.
- NASA Science — Eclipses and the Moon. Solar and lunar eclipse explanation.