Astraeus hygrometricus (the "barometer earthstar") is the most well-known species, found in sandy or disturbed ground. Astraeus odoratus is a popular edible delicacy in northern Thailand. 3. Astronomy & Technology

In Greek mythology, Astraeus is the personification of the "starry night". He is the son of the Titans Crius and Eurybia.

In mycology, Astraeus is a genus of "earthstar" fungi known for their hygroscopic nature—their outer layer opens like a star in wet weather and closes when dry to protect the spore sac.

He married Eos (the Dawn). Together, they produced the four seasonal winds— Boreas (North), Notus (South), Eurus (East), and Zephyrus (West)—as well as the five wandering stars (planets) and his daughter Astraea , the goddess of innocence and justice.

These fungi form ectomycorrhizal (mutually beneficial) relationships with the roots of trees like the sal tree in Thailand or various shrubs.

He is often depicted in a starry cloak, presiding over the celestial majesty of the heavens. 2. Biological Science: The Astraeus Genus