The literary device used in this sentence is a metaphor. It compares taking a small step to represent a significant achievement for humanity.
The literary device used in this sentence is parallelism, where two phrases have a similar structure for emphasis and rhythm.
antithesis
antithesis
Antithesis .
antithesis
antithesis
antithesis
The literary device in this sentence is personification. This is because it attributes human traits, such as visibility, to the "east edge of the earth."
onomatopoeia
This sentence uses onomatopoeia, a literary device where words sound like the noise they describe. The word "clicking" imitates the sound of the timer in this sentence.
In order to identify the literary device used in a sentence, I would need to know the specific sentence you are referring to. Literary devices can include metaphors, similes, personification, imagery, alliteration, etc. Each device conveys meaning in a unique way.
Antithesis <3