This weekend might have three meteor showers active at the same time, combining to provide a celestial firework display almost all through the night.
The Southern Delta Aquariids have been known to throw up some surprises. In 2006, they produced an outburst, with some people observing more than 60 meteors per hour at their peak. No outburst is forecast for this year, but you never know what might happen!
The final shower, the Piscis Austrinids, are perhaps the least studied of the three. Like the Alpha Capricornids, they are a minor shower that yields just a few meteors per hour, even at their peak. Their meteors are of medium speed.The key for observers is to work out when the shower's radiant will be above the horizon. The radiant is the point in the sky from which all the meteors in the shower appear to radiate.
In the case of our midwinter trio, we're quite lucky. All three radiants rise in the early-to-mid evening from Australia, and reach a reasonable altitude by about 10 p.m. By morning, around 5am, local time, on Sunday, July 31, the meteor showers will appear to radiate from the western sky. The planets Saturn, Jupiter, and Mars should be visible too.
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