The globular cluster Messier 75 reaches its best visibility of the year tonight. Located in the wilderness between Sagittarius and Capricornus, it’s not an easy object to locate but scanning the area with binoculars first might help the search.
Discovered by Pierre Méchain in 1780, this dense star cluster lies some 67,500 light years away and is thought to be about 67 light years in diameter. It shows a large, bright core when observed through a telescope.
11:02 UT – Venus is stationary prior to beginning retrograde motion. (16% illuminated, magnitude -4.4, diameter 45.3”. Naked eye, Leo, evening sky.)
Mercury leaves Gemini and enters Cancer. (100% illuminated, magnitude -2.0, diameter 5.0”. Not visible.)
The globular cluster M75 culminates at midnight tonight. (Magnitude 8.6. Sagittarius, all night. See images above.)
Events in bold involve objects and/or events that are visible with the naked eye.
All times are in Universal Time (UTC). To convert the time to your timezone, click here.
2015: An Astronomical Year
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