periastron
noun
peri·as·tron
¦perē¦astrən,
-ˌsträn
plural periastra
-strə
: the point in the orbit of a star or other celestial body where it is nearest to the primary star with reference to which it is revolving
the periastron of a comet
compare apastron
Dictionary Entries Near periastron
Cite this Entry
“Periastron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/periastron. Accessed 22 Nov. 2024.
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