The Jupiter trojans are a large group of asteroids that share the orbit of the planet Jupiter around the Sun. The first one discovered, 588 Achilles, was spotted in 1906 by German astronomer Max Wolf. By convention they are named after mythological figures from the Trojan War. Around 1 million of them are larger than 1 km in diameter. No firm evidence of any specific compound on their surface has been obtained, but it is thought that they are coated in tholins, organic polymers formed by the Sun's radiation. They are clustered in elongated, curved regions around Jupiter's two stable Lagrangian points: L4, lying 60° ahead of the planet in its orbit, and L5, 60° behind. Jupiter trojans are thought to have been drawn into their orbits during or before the migration of the giant planets. Mars and Neptune also have trojans, and the first Earth trojan was discovered in 2010.

Read more: https://en.wikipedia.org/wiki/Jupiter_trojan

_______________________________ Today's selected anniversaries:

1832:

The June Rebellion, an anti-monarchist uprising of students, broke out in Paris. https://en.wikipedia.org/wiki/June_Rebellion

1862:

Vietnamese guerrilla leader Trương Định decided to defy Emperor Tự Đức and the Treaty of Saigon, choosing to fight on against the Europeans. https://en.wikipedia.org/wiki/Tr%C6%B0%C6%A1ng_%C4%90%E1%BB%8Bnh

1956:

American singer Elvis Presley performed "Hound Dog" on The Milton Berle Show, an appearance that generated many letters of protest. https://en.wikipedia.org/wiki/Hound_Dog_(song)

1963:

The arrest of Ayatollah Ruhollah Khomeini for publicly denouncing Shah Mohammad Reza Pahlavi sparked protests in Iran. https://en.wikipedia.org/wiki/June_5,_1963,_demonstrations_in_Iran

_____________________________ Wiktionary's word of the day:

Danicize: To make more Danish. https://en.wiktionary.org/wiki/Danicize

___________________________ Wikiquote quote of the day:

Americans are apt to be unduly interested in discovering what average opinion believes average opinion to be; and this national weakness finds its nemesis in the stock market.   --The General Theory of Employment, Interest and Money https://en.wikiquote.org/wiki/The_General_Theory_of_Employment,_Interest_and_Money