Answer:
The meteorite condition in space that is similar to what was most likely present in Earth's early atmosphere is a lack of oxygen. Oxygen is a highly reactive element and would not have been present in significant quantities in the early atmosphere. Instead, the early atmosphere is thought to have consisted mainly of nitrogen, carbon dioxide, and water vapor, along with smaller amounts of other gases such as methane and ammonia. Similarly, many meteorites are also formed under conditions of low oxygen, such as in the outer regions of the solar system or in the presence of reducing agents such as hydrogen. This similarity makes meteorites a valuable tool for studying the conditions and chemical processes that may have occurred in the early Earth's atmosphere.