|
Star and Planets dates
|
|
Written by James Barclay
|
|
Wednesday, 28 May 2008 |
|
Best dates for STARS and Planets (Venus, Jupiter or Saturn)
To know what Planets are visible on these dates, go see Moon and Planets page.
2008 dates
Aug 20 - 31
Sep 01 - 06 and 18 - 30
Oct 01 - 05 and 18 - 31
Nov 01 - 04 and 15 - 30
Dec 01 - 04 and 15 - 31
2009 dates
Jan 15 - 31
Feb 14 - 28
Mar 14 - 31
Apr 14 - 30
May 13 - 28
Jun 12 - 26
Jul 11 - 27
Aug 10 - 25
Sep 10 - 23
Oct 09 - 24
Nov 07 - 23
Dec 07 - 23
|
|
Last Updated ( Wednesday, 13 August 2008 )
|
|
|
Star and Planets dates
|
|
Written by Administrator
|
|
Wednesday, 30 May 2007 |
- There are two types of star clusters: Open and Globular.
- OPEN CLUSTERS (OC) are a bunch of stars held in a small space by each othr es gravity. A typical OC has about 100-500 stars and these OC's number in their hundreds and are fairly bright and easy to find and view in a small quality telescope. During our southern winter, many are found scattered along the Milky Way strip between Carina (on the western side of the Southern Cross) through the latter into Scorpio and ending in Sagittarius.
- Because of their nature most of them can be glimpsed in amateur telescopes. Some of the brighter ones like NGC 4755 in Crux ( 'Jewel Box') and NGC 3352 in Carina can be seen fairly well in low power scopes and binoculars, while others require at least a 100mm dia. telescope or bigger to see the more distant and fainter ones. If you look in the Messier catalogue there are dozens of star clusters and these can be found on the Internet. Just type Messier catalogue number 1 - 104 in Google and away you go!
- GLOBULAR clusters on the other hand are not as bright as or numerous as the Open Cluster type. In our southern winter we have Omega Centauri-NGC 5139 which spans 2 degrees of sky (about a finger width) and contains about 4 million stars. In our summer skies we have 47 Tuc (NGC 104) near the Small Magellanic Cloud.
- Best nights to view star clusters is listed under Stars and Planets.
|
|
Last Updated ( Sunday, 10 August 2008 )
|
|
|