This Day In Astro History

Minos Linea on Europa
False color image of the Minos Linea region on Europa. Image by Galileo Spacecraft.

Neptune's Great Dark Spot
Neptune's Great Dark Spot and the "scooter". Image by Voyager 2

Saturn, by Voyager 2
Voyager 2 snaps a picture of Saturn

August 25

2000 - The journal Science reports findings from the Galileo spacecraft's  magnetometer data that provide the strongest evidence yet of a salty liquid water ocean beneath the surface ice of Europa, one of Jupiter's moons. 

ACE spacecraft logo1997 - Advanced Composition Explorer (ACE) launched on a McDonnell-Douglas Delta II 7920 launch vehicle from the Kennedy Space Center in Florida. The prime objective of ACE was to measure and compare the composition of several samples of matter, including the solar corona, the solar wind, and other interplanetary particle populations, the local interstellar medium (ISM), and galactic matter.

1989 - Voyager 2 Neptune Flyby  

1981 - Voyager 2 Saturn Flyby.  
1609 - Galileo Galilei demonstrates his first telescope to Venetian lawmakers. Galileo telescope
A replica of the earliest surviving telescope attributed to Galileo,on display at the Griffith Observatory. (Image by Michael Dunn)

Every Year - Northern Iota Aquarids Meteor Shower Peak 
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It is my conclusion that human evolution and the motions of matter in space are intrinsically linked. The observation and understanding of the complexity of biological history on Earth cannot be complete without the tandem observation and understanding of a dynamic greater cosmos. - SpaceGene