Archive for : July, 2007

Skywatching Book Review

Skywatching BookSkywatching (ISBN 0002200287) is an all rounder type of astronomy book which claims to be the Ultimate Guide to the Universe. This is the type of book a grandmother or aunt would buy you for your birthday or Christmas once they have learnt that you are interested in astronomy but this is not a bad thing, as Skywatching is a very colourful book with lots of very useful content and images.

 

The first chapter of Skywatching gives a very good guide to sky watching through the ages, including the first sky watchers such as the Babylonians and the Chinese astronomers. This chapter also mentions Copernicus, Kepler and of course Galileo. Milestones during the 20th Century are also nicely covered from Einsteins publishing of relativity in 1905 to 1994 when the periodic comet shoemaker Levy 9 collided with Jupiter.

Chapter two covers stars and galaxies, including dwarf stars, giant and super giant stars. This chapter also covers a wide range of sites to look for in the sky including nebulae, star clusters and galaxies such as M31, M33, M81 and M87.

There is also a chapter on Skywatching Tools and Techniques; this covers naked eye astronomy, observing techniques such as using red lights for outdoor viewing and measuring sizes and distances using your hands. This chapter also takes you through using binoculars for astronomy and the different types of binoculars. It also contains information on the different types of telescopes and which is the right one for you. There is also a small section on eyepieces and on astrophotography and large telescopes.

Chapter four entitled Understanding the Changing Sky, takes you through how to map the stars and how the earth spins and how the seasons are created. This chapter also discusses the phases of the moon, star brightness and colour, and solar and lunar eclipses, it also covers shooting stars and other lights in the sky such as rainbows and aurorae and haloes.

Chapter five is a very large chapter which shows you how to use starfinder charts and it then goes on to describe each constellation in turn with a page for each, including a description and what to look for as well as a sky chart for each and what other exciting sites can be found in that constellation.

Chapter six is a tour of the solar system and there are some great pictures and write ups about each planet and our moon, this chapter also covers comets and asteroids.

This version of Skywatching that I am reviewing was reprinted in 1996, so that is quite an old book, but a lot of the content is still the same today, we still have the same constellations and planets to view, it maybe that we have now discovered more in the sky and technology has now improved, but Skywatching from Collins is still a very good book, what makes it especially good is because it is so readable and gives you the information without bogging you down in science, plus the number and quality of images in the book are great.

Skywatching is the type of book for amateur astronomers who would go back and use the book as reference again and again.

Skywatching is available at Waterstones

Setting Circles – Good, Bad or Ugly?

As a very amateur astronomer I find it hard to locate objects in the sky, it could be me or my Meade Bresser 130N, but anyway, I tried polar aligning the telescope last night to Polaris and set the latitude to about 52 degrees, then reset the declination to 90 degress, or on my scopes mount 9 – is this right? I then set the RA to 0 – is this also correct??

I then chose a close star in Ursa Major (Plough) and moved the telescope using the dials on the mount to the correct RA and Dec as seen in Starry Night Pro, but on arriving at my star I found my telescope to be pointing in the wrong location, after manually correcting the telescope myself onto the star, I then looked down to the mounts RA and Dec settings to find that the Dec was correct but the RA was about 2hours out – well I think it was two hours as the main points on it are I think in hour segments and within those are 6 markings, which I imagine to be ten second markings. Maybe I was not correctly on Polaris in the first place – who knows!

It appears to me that the mount is ok for losely pointing you in the direction of the sky you need to be in, but the settings are so exactly shown in Starry Night Pro, but you just can’t get this sort of precision with these mounts. Agree / Disagree?

Has anyone else had fun setting up and using setting circles, can anyone give me advice on setting up and using them?

Ordered a Canon 400D SLR from Comet

Now I must be really getting the astronomy bug, as just a few days after ordering a Philips SPC900 webcam, I have jumped in with both feet and ordered a Canon 400D SLR Digital Camera from Comet, which was a good price as they gave me £40 off by using a code – ‘SUMMER40’ if I spent over £400 (or SUMMER30 if you spend over £30, and SUMMER20 if you spend over £20 – but that ends Friday 13th July), plus there is a cashback off on at the moment of £50 when you buy a Canon, so that should make the camera £389 with free delivery.

I went for the 400D instead of the 350D, as I thought with me constantly taking off the camera lens and adding the telescope adaptors that dust may get into the chip, but the Canon 400D has a shake clean mechanism to remove dust from the sensor, plus alot of other astronomers and amateur photographers seem to have this camera – although that does not make it good!

I then just need to purchase a nice tripod, case, remote control, memory card and of course the all important t adaptors in order to rig it up to the telescope – does this spending on this new hobby ever end?

Ordered a Philips SPC900 Webcam from Amazon

I finally went for it and ordered a Philips SPC900 webcam from Amazon, which is actually being sold through Pixmania, but the postage is less through Amazon than purchasing it direct with Pixmania – strange.

Philips SPC900NC webcamThe Philips SPC900 is costing me £46 delivered. Now after trying my Logitech Pro4000 webcam I can actually compare both the webcams when it comes to astronomy use, and luckily the webcam adaptor that I purchased for the Logitech Pro4000 webcam will still fit on the Philips SPC900.

I also noticed on my travels that you cannot buy the Logitech Quickcam Pro4000 anymore as it has been superseded by the Logitech Quickcam Pro5000, but I imagine after looking at the logitech website that the CCD chip and insides are the same as the 4000, the best price though if you are looking at the 5000 does seem to be PCWorld at around £30.

As soon as I get it and get a clear night, I shall try it out and report back with comparative images from both webcams.

As Seen on ScopesNSkies Web Site

As I live close to the ScopesNSkies store, I popped down there the other day to purchase a webcam adaptor and a 4x ImageMate to use with my Logitech Pro 4000 webcam.

I have now noticed on their website that I now have been caught on film and can actually be seen in the showroom looking round – at last I’m famous and can be found on their site!

Me at ScopesNSkies

That’s me on the left hand side in the nice stripey shirt.