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:
The June Rebellion, an anti-monarchist uprising of students,
broke out in Paris.
Vietnamese guerrilla leader Trương Định decided to defy
Emperor Tự Đức and the Treaty of Saigon, choosing to fight on
against the Europeans.
American singer Elvis Presley performed "Hound Dog" on The
Milton Berle Show, an appearance that generated many letters of protest.
The arrest of Ayatollah Ruhollah Khomeini for publicly
denouncing Shah Mohammad Reza Pahlavi sparked protests in Iran.
Wiktionary's word of the day:
To make more Danish.
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
Show replies by date