What is the sequence of objects in a solar eclipse

In a solar eclipse, the order of the celestial bodies is Sun, Moon, Earth.

Multiple approaches independently resulted in a similar conclusion.

Darwin was writing up his theory in 1858 when he received an essay from Alfred Russel Wallace, who was in Borneo, describing Wallace's own theory of natural selection. Joint publication of Darwin's essay together with Wallace's paper was immediately prompted but received little notice from the public.

The public's disregard of their work spurred Darwin to write an abstract of his work which was published in 1859 as his book "On the Origin of Species".