Two nights ago, the globular cluster M 80 was at its best visibility for the year. Tonight it’s the turn of it’s larger, brighter and splashier sibling, M 4. Located close to the bright orange star Antares, M 4 is easily seen with binoculars and, at magnitude 5.9, is within range of keen-sighted naked eye observers under clear dark skies.
Ordinarily, globular clusters often appear as small, fuzzy balls of grey light but M 4 is an exception. It’s large enough for the individual stars to be seen and is a spectacular sight when observed through a telescope.
(Click on an image to enlarge.)
Asteroid 4 Vesta leaves Aquarius and enters Pisces. (Magnitude 7.4. Pre-dawn sky.)
The globular cluster M4 culminates at midnight tonight. (Magnitude 5.9. Scorpius, all night. See images above.)
Events in bold involve objects and/or events that are visible with the naked eye.
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2015: An Astronomical Year
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