The waxing crescent moon will pass less than a degree to the south of Saturn. Catch the pair together in the evening sky. The pair will be difficult to observe as they will appear no higher than 13° above the horizon. They will become visible around 16:23 GMT.
20th Anniversary of Galileo probe flyby of Europa.
Galileo came within 351 kilometers (218 miles) of Europa, and briefly passed behind the frozen moon. After the flight over Europa, Galileo was able to observe another three of Jupiter’s moons: Amalthea, Thebe and Metis.
10th Anniversary of the first live tweet from Space
NASA astronaut T.J. Creamer on the ISS sent the first live, unassisted tweet from space. Astro_TJ, wrote: “Hello Twitterverse! We r now LIVE tweeting from the International Space Station — the 1st live tweet from Space! 🙂 More soon, send your ?s.”
30th Anniversary of the Launch of the Hubble Space Telescope
Hubble Space Telescope launched from shuttle Discovery, weighing approximately 11,355 kg. The first image taken by Wide Field/Planetary Camera was released 20 May 1990. A spherical aberration in the optical system, which severely reduced the quality of the images produced was announced publicly June 27.