One of the fun things about winter is the night sky. Cold, clear, winter skies are characterized by a lack of humidity and if you live in the country there is very little urban light pollution creating some spectacular opportunities for star-gazing.
December brings a couple of meteor showers to the night skies. The more prolific of the two is the Geminids with as many as 120 shooting stars per hour. Shooting stars are most often associated with the Earth’s passage thru the debris field of a comet. Gritty debris burns-up as it collides with the upper atmosphere. The Geminids are a bit of a mystery as they are related with an extinct comet which also happens to be a near-earth asteroid named 3200 Phaethon.
The Geminid meteor shower began December 4th and will remain active thru the 17th. It will be producing meteors at its peak rate this Saturday and Sunday evenings.
Each meteor shower is named after its radiant - that point where the shower appears to come from. In this case the constellation Gemini - The Twins. A meteor shower's radiant needs to be above the horizon before any of the action begins. And you don't have to look directly at the radiant to see meteors; shooting stars will be visible across the sky once the radiant has risen.
Find the easily recognizable belt of the three bright stars in Orion the Hunter. From Orion's belt (or from Rigel, his foot, through the belt), follow an imaginary line towards the northeast (up and left). Continue this line until you see two bright stars close together - Castor and Pollux - the heads of Gemini.
For the duration there will be a chance of seeing Geminid meteors whenever the shower’s radiant point – found in the constellation Gemini – is above the horizon. The number of visible shooting stars increases as the radiant point rises to its highest point in the night sky.
December also brings the Ursid meteor shower with 5 to
10 shooting stars per hour as the Earth passes thru the debris field of Comet
8P/Tuttle.
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Although not as spectacular as the Geminids peak action coincides with
the solstice the evening of the 21st and 22nd. This year the new moon occurs a few days before the Ursids peak, so you'll enjoy dark skies. Best time is before dawn with 10-15 meteors per hour.
Mark your calendar and if your
catch a cold, clear, winter sky bundle-up and take some time to sit outside and
observe the heavens.
There’s no
mosquitoes this time of year!



