The phrase "a significant atmosphere" is correct and usable in written English.
It can be used to describe an important or impactful environment or mood in a particular context, such as literature, film, or events.
Example: "The film created a significant atmosphere that kept the audience on the edge of their seats throughout the entire story."
Alternatives: "a notable ambiance" or "an impactful environment."
In this view, the early environment on Mars, when it did have a significant atmosphere, may have resembled Antarctica's.
A planet as small and as hot as Mercury has no possibility of retaining a significant atmosphere, if it ever had one.
But the new measurements — based on observations from multiple telescopes in different parts of South America — indicate that Makemake, like another dwarf planet, Eris, does not have a significant atmosphere.
Saturn's moon Titan is distinguished from all other moons in the solar system by the presence of a significant atmosphere, one that is denser than that of any of the terrestrial planets except Venus.
The aim of the Venus Entry Probe TRS is to study approaches for low-cost in situ exploration of Venus and other planetary bodies with a significant atmosphere.
Bodies that lack a significant atmosphere and internal magnetic fields, such as the Moon and asteroids, can to a first approximation be considered passive absorbers of the solar wind.
Mercury is too small and hot for its gravity to retain any significant atmosphere over long periods of time; it does have a "tenuous surface-bounded exosphere" containing hydrogen, helium, oxygen, sodium, calcium, potassium and others.
However, the absence of any significant atmosphere, the unlikelihood of bodies of liquid, and the intense solar radiation make the prospect for life on Mercury remote.
On Mercury, Mars, and the Moon, the absence of water and any significant atmosphere has left the craters unchanged for billions of years, apart from disturbances produced by infrequent later impacts.
Although the Moon lacks any significant atmosphere and ionosphere there are many interesting features to this seemingly simple solar wind interaction.
Such an airglow is excited when molecular oxygen is dissociated by electron impacts, evidence of a significant neutral atmosphere composed predominantly of O2 molecules.
