Saturday: Saturn is about a fist held out at arm’s length to the lower right of the moon at 9:00 p.m. At this time, Jupiter is about one fist above the east-northeastern horizon.
Sunday: Is your favorite astronomy-loving relative asking
for a telescope this Christmas? Before reaching for your credit card, read this
guide to choosing your first telescope, available at http://goo.gl/5oXmGj. If cost is an issue, look
no further than this article about low cost telescopes https://goo.gl/8yyddy. These are not cheap
telescopes. They are simple, low-cost, easy to use telescopes that your future
astronomer will still use for quick observing sessions long after she has
purchased a much larger instrument for richer viewing. If you want to give a gag
astronomy gift to someone who really bugs you, give them a copy of this column.
After such a dud “gift”, you’ll never hear from them again. And that may be the
best gift of all.
Monday: Have you been online shopping all weekend? Do you
need an evening sky break? You deserve a big reward so make it a double. A
Double Cluster, that is. The Double Cluster, also known as h and Chi Persei,
consists of two young open star clusters in the constellation Perseus. Of
course, young is a relative term as these clusters are about 13 million years
old. Each cluster is spread out over an area about the same size as the full
moon. To the naked eye, the Double Cluster shines with a steady, fuzzy glow.
Binoculars resolve dozens of individual stars in the clusters. The Double
Cluster is five and a half fists above the northeastern horizon at 6:00 p.m.,
about a fist below the sideways “W” of Cassiopeia and three fists above the
bright star Capella.
Tuesday: Mercury is one fist above the southeast at 6:45
a.m.
Wednesday: It’s getting too cold to see frogs in the wild.
But this is a great time to see frogs in the sky. Ancient Arabs referred to the
stars that we now call Fomalhaut and Diphda as Ad-difdi al-awwal and Ad-difda
at-tani. This means the first frog and the second frog, respectively. Both
frogs are low in the southern sky at 6:00 p.m. Fomalhaut is nearly one and a
half fists above due south. The slightly dimmer Diphda is two fists above the
south-southeast horizon.
Thursday: Tonight’s December full moon is called the Cold
Moon… for obvious reasons. On the evening of a full moon, the moon rises as the
Sun sets, reaches its highest point in the sky in the south at midnight, and
sets as the Sun rises.
Friday: The bright star Vega is four and a half fists above
the western horizon at 6:00 p.m.
The positional information in this column about stars and
planets is typically accurate for the entire week. For up-to-date information
about the night sky, go to https://nightsky.jpl.nasa.gov/planner.cfm.
All times are Pacific Time unless noted.