In astronomy, an open cluster family is a group of approximately coeval (age range 30 Myr) young open star clusters located in a relatively small region of the Galactic disk (radius 250 pc).
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Famous quotes containing the words open, cluster and/or family:
“[Let] the Union of the States be cherished and perpetuated. Let the open enemy to it be regarded as a Pandora with her box opened; and the disguised one, as the Serpent creeping with his deadly wiles into paradise.”
—James Madison (1751–1836)
“the green hells of the sea
Where fallen skies and evil hues and eyeless creatures be;
On them the sea-valves cluster and the grey sea-forests curl,
Splashed with a splended sickness, the sickness of the pearl;”
—Gilbert Keith Chesterton (1874–1936)
“While one family is well-fed and clothed, a thousand others grumble.”
—Chinese proverb.