[net.astro] StarDate: December 13 The Geminid Meteor Shower

dipper@utastro.UUCP (Debbie Byrd) (12/13/85)

One of the year's best meteor showers peaks tonight!  More on the
Geminid meteor shower -- after this.

December 13  The Geminid Meteor Shower

Tonight -- if you're looking in a dark-enough sky -- you'll probably
see some meteors, or shooting stars.  The Geminid meteor shower peaks
around midnight tonight.  Some meteors should be visible in dark
country skies throughout the night -- as the Earth moves through a
region of space filled with bits of dust.

Viewing conditions for the shower will be ideal.  The cooler air at
this time of year can be crystal clear, and luckily the moon is mostly
absent from the night sky.  Seventy-five meters per hour may be seen at
maximum tonight night.  The meteors will appear to radiate from the
area near Castor and Pollux -- the Gemini Twins -- but they'll be seen
all over the night sky.

Most meteors start out only as large as a grain of sand.  They orbit
the sun at various angles and in different directions, forming a vast
sphere of dust around the sun.  Earth's intersection with distinct
meteor streams within this sphere results in about a dozen major meteor
showers per year.  When the meteors collide with Earth's atmosphere,
they're vaporized by friction with the air.  They appear as a blazing
streak -- a meteor, or shooting star.

A handful of meteors per hour are visible on most nights.  But the
Geminid shower is one of the best.  Last year, 30 meteors per hour were
seen in the light of a last quarter moon.  But you must look for the
meteors from a country location -- away from the glare of city lights.
Give it a try!

Script by Holly Clark
(c) Copyright 1984, 1985 McDonald Observatory, University of Texas at Austin