|
Welcome to 2007
I hope you had a good Christmas and New Year and perhaps even managed to get
out and enjoy the skies and natural world. We had a few clear nights but the
weather hasn't yet got crisp enough to give those clear sparkling nights that
show so many more stars. I took a William Optics 66mm refractor home to try over
the holiday period and enjoyed showing some friends the Moon at New Year. It's
the same one I took to Turkey for the solar eclipse and is easy to carry and
store. I used it on a camera tripod which works fine, but I prefer one with
slow-motion controls to make it easier to align. Next time I'll take home one of
our alt-az mounts as well.
How far can you see?
This is one of the most common questions that beginners ask when buying a
telescope and it's difficult to answer in a way that is meaningful to them.
Cosmic distances are generally beyond our comprehension and certainly beyond our
experience. One of the easier stepping stomes to starting to understand
distances is to find the Andromeda Galaxy and contemplate that the light
entering your eyes has been travelling through space for more than two million
years. This is the most distant object you will see with your naked eye and most
people are amazed when told that it is considered to be a 'local' galaxy and is
quite close in the greater scheme of things. At two recent star parties I helped
people find it in binoculars using a laser pointer. They were able to pick up
the laser beam then follow it to the galaxy. It's a most effective tool and
always impresses.
Favourite Constellation?
I expect most astronomers have a favourite constellation and if I had to
guess I would say that Orion is the most popular of all. It hangs there
throughout the Winter dominating the sky and is easy to recognise. Within it is
the great nebula, the horsehead nebula and many other worthy sights. Betelgeuse
and Rigel have such contrasting colours they make a good example when showing
newcomers that stars do have different colours. If you are new to astronomy and
feel there is too much to take in and don't know where to start, why not set out
to become more familiar with Orion. Concentrate on learning what is where within
the 'hourglass' figure, then move outwards to find nearby constellations such as
Taurus, Gemini and the two hunting dogs, Canis Major and Canis Minor.
Welcome back Saturn
Saturn has been visible in the night sky for quite some time now but for most
people its return is noticed when it's easily visible in the evening sky. It
rises around 7:30 pm so you don't need to stay up too late to observe it. Look
for it in Leo where the backwards question mark is distinctly recognisable. If
you're not sure where to look start with the pointers in the Plough and follow
them in the opposite direction to Polaris. Saturn is quite bright and easy to
spot close to Regulus, the bright star at the bottom of the question mark.
Besides looking at the rings why not follow the movement of Titan, Saturn's
largest Moon. It makes almost two orbits around Saturn in a month. Also see if
you can identify Iapetus which is fainter and moves more slowly than Titan. This
month's Astronomy Now has a large feature on Titan which is well-worth
reading. It helps bring to life that little point of light that you see in your
telescope.
Christmas Aftermath
Christmas was very busy for us and we're now taking stock and replenishing
the shelves. We're also busy with courses and the free course we offer with
every ETX and LX90 is heavily subscribed. The beginners' courses are also
proving popular as recipients of telescope presents decide to learn more
about the subject. At the time of writing there are no places left on the ETX
course next Saturday but we will be arranging another one when the demand builds
up again. Please let us know if you are interested.
Astrofest 2007 - 9th and 10th February 2007
Our next big task is to prepare for Astrofest which is held in
Kensington Town Hall on 9th and 10th February 2007. A new room has been brought into
use which we shall share with Cape Instruments. It is on the lower floor and
we hope you will be able to visit us there. At present we are looking at ways of
keeping the showroom open as well but may have to close for the two days. Please
check before coming to the showroom during Astrofest in case we are closed.
Keeping a Log
Serious astronomers always stress the importance of keeping a log or record
of your observations. Beginners usually think it's not worthwhile because they
don't yet know what they are doing and don't know what to record. However,
keeping a log from the very beginning is a useful discipline to develop and adds
its own interest, especially when you look back at earlier entries. Any exercise
book will do but if you want help to get started then we recommend The Night
Sky Tracker. This is a combined handbook and logbook which contains a lot
of good basic information laid out is a form that is simple to read and
assimilate. It comes with a glow-in-the dark cover to make it easier to find
when you want to make an entry and has pages laid out with the basic information
you should record. It costs £12.99.
And Finally...
We've decided to continue the Tuesday Night Star Parties until the end of
February. The next one is on 9th January 2007 from 7 pm to 10 pm then every
other Tuesday. Dates are on the web site.
Best wishes and Clear Skies
Neil
|