Skip to content

SANParks.org Forums

View unanswered posts | View active topics






Post new topic Reply to topic  Page 2 of 3
 [ 43 posts ]  Go to page Previous  1, 2, 3  Next
Author Message
 Post subject: Re: Best night sky viewing
Unread postPosted: Sat Apr 25, 2009 3:47 am 
Offline
Distinguished Virtual Ranger
Distinguished Virtual Ranger
User avatar
Award: Quiz Whiz of the Year (2013)
Joined: Tue Dec 23, 2008 5:22 am
Posts: 21857
Location: Midway between the infinite and the infinitesimal!
And the Karoo!
But, of course, the best viewing would be to climb a high mountain and look on a clear day. At least another couple of thousand stars would appear.

_________________
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)


Top
 Profile  
 
 Post subject: Re: Best night sky viewing
Unread postPosted: Fri Aug 14, 2009 9:46 am 
Offline
User avatar

Joined: Wed Nov 15, 2006 12:48 pm
Posts: 227
Location: ...now or later on ?
As to date I would have to say Olifants rest camp in KNP, the river view in full moon is awesome & every little flicker of light can be seen in the sky. Having a telescope on hand was the cherry on top...

_________________
Life is what we make of it..we can not control what happens in our life but how we handle it.

The Kruger Park..a place that is close at heart


Top
 Profile  
 
 Post subject: Re: Best night sky viewing
Unread postPosted: Sat Aug 15, 2009 2:32 am 
Offline
Distinguished Virtual Ranger
Distinguished Virtual Ranger
User avatar
Award: Quiz Whiz of the Year (2013)
Joined: Tue Dec 23, 2008 5:22 am
Posts: 21857
Location: Midway between the infinite and the infinitesimal!
deffstes, I'm still blown away by those two brilliant photographs - I love the forethought of composition that went into them. Both are great, but the southern circumpolar one is my favourite - I don't know if you planned to have the Magellanic Clouds where they were perfectly positioned for the photograph, but I think you should win some kind of award ... Really!

_________________
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)


Top
 Profile  
 
 Post subject: Re: Stargazing - Helpful hints and stuff.
Unread postPosted: Sat Aug 15, 2009 12:54 pm 
Offline
User avatar

Joined: Wed Nov 15, 2006 12:48 pm
Posts: 227
Location: ...now or later on ?
A tip to judge the difference between a star and planet in the night sky...
I'm sure all of us are fimiliar with the nursery rhyme "twinkle twinkle little star", remember it the next time you're star gazing.

Due atoms, molecules creating energy and stars being some what smaller than planets they tend to give off flickers of different light...so if it flickers it's a star and if it does not, it's a planet. :wink:

_________________
Life is what we make of it..we can not control what happens in our life but how we handle it.

The Kruger Park..a place that is close at heart


Top
 Profile  
 
 Post subject: Re: Stargazing - Helpful hints and stuff.
Unread postPosted: Tue Aug 25, 2009 8:13 am 
Offline

Joined: Mon Aug 24, 2009 4:33 pm
Posts: 54
Location: MP,South Africa
bentley wrote:
so if it flickers it's a star and if it does not, it's a planet.
A tip to judge the difference between a star and planet in the night sky...
I'm sure all of us are fimiliar with the nursery rhyme "twinkle twinkle little star", remember it the next time you're star gazing.

Due atoms, molecules creating energy and stars being some what smaller than planets they tend to give off flickers of different light...so if it flickers it's a star and if it does not, it's a planet. :wink:


Intersting enuff, what if it shoots, what exactly makes them do that.


Top
 Profile  
 
 Post subject: Re: Stargazing - Helpful hints and stuff.
Unread postPosted: Tue Aug 25, 2009 10:48 am 
Offline
User avatar

Joined: Wed Nov 15, 2006 12:48 pm
Posts: 227
Location: ...now or later on ?
Ahh...the shooting star (fireball), what / how it comes to being ?
Image

A shooting star or falling star is the common name for the visible path of a meteoroid as it enters the earths atmosphere, a shooting star isn't a star at all.

Most of the shooting stars that we can see are known as meteoroids. These are objects as small as a piece of sand, and as large as a boulder. Smaller than a piece of sand, astronomers call them interplanetary dust and the large boulder type are called asteroids.

A meteoroid becomes a meteor when it strikes the atmosphere and leaves a bright tail behind it, bright line that we see in the sky is caused by the ram pressure, heat and gas carried in the meteor and the cold tempreture of the atmosphere. It burns up and disintergrates due to the above factors mentioned...like taking a piping hot glass out the oven and emersing it a high speed into ice cold water, it shatters on contact..now combine it with gas.

When a meteoroid is larger, the streak in the sky is called a fireball or bolide. These can be bright, and leave a streak in the sky that can last for more than a minute. Some are so large they even make crackling noises as they pass through the atmosphere.

If any portion of the meteoroid actually survives its passage through the atmosphere, astronomers call them meteorites.

Some of the brightest and most popular meteor showers are the Leonids, the Geminids, and the Perseids. With some of these showers, you can see more than one meteor (or shooting star) each minute.

_________________
Life is what we make of it..we can not control what happens in our life but how we handle it.

The Kruger Park..a place that is close at heart


Top
 Profile  
 
 Post subject: Green laser pointers
Unread postPosted: Fri Oct 02, 2009 12:19 pm 
Offline
Junior Virtual Ranger
Junior Virtual Ranger
User avatar

Joined: Tue May 19, 2009 2:15 pm
Posts: 1902
Location: Johannesburg - too far from the closest Sanpark
Hi guys, I'm thinking of buying a green laser pointer for star gazing. Does anyone have experience with green laser pointers? Anyone have any advice?

I'm probably going to get a 20mW or 50mW unit.

_________________
The 'mite formerly known as joshilewis

FGASA Level 1 Guide

Glen Reenen TR

15-18 June: Berg-en-dal


Top
 Profile  
 
 Post subject: Re: Green laser pointers
Unread postPosted: Sat Oct 03, 2009 11:40 pm 
Offline
Distinguished Virtual Ranger
Distinguished Virtual Ranger
User avatar

Joined: Wed Aug 31, 2005 12:28 am
Posts: 14306
Location: Pretoria, RSA
They are great and works excellently.

But they are rather expensive.

If you are going to use them regularly, it might be worth the money. Otherwise a good torch with a concentrated light does the same basic job. The green pointers does have the professional image though.
:wink:

_________________
Imberbe = Combretum imberbe = Leadwood = Hardekool = The spirit of the Wildernis!

Want to know more about the SANParks Honorary Rangers? Visit www.sanparkshr.org


One positive deed is worth more than a thousand critical words.


Top
 Profile  
 
 Post subject: Re: Green laser pointers
Unread postPosted: Sun Oct 04, 2009 8:30 pm 
Offline
Senior Virtual Ranger
Senior Virtual Ranger
User avatar

Joined: Sun Jul 22, 2007 6:10 pm
Posts: 1230
Location: New Brunswick, Canada
green laser pointers? :huh:
I'm lost guys...Is this a special telescope to view the heavens? :redface:

_________________
CC & Lockie's Travel Tale


Top
 Profile  
 
 Post subject: Re: Green laser pointers
Unread postPosted: Sun Oct 04, 2009 8:34 pm 
Offline
Distinguished Virtual Ranger
Distinguished Virtual Ranger
User avatar

Joined: Wed Aug 31, 2005 12:28 am
Posts: 14306
Location: Pretoria, RSA
:lol: No

It is a:

1. Green
2. Lazer
3. That you use to point with.

It gives a nice long and visible green light, and makes pointing at the stars fun.

_________________
Imberbe = Combretum imberbe = Leadwood = Hardekool = The spirit of the Wildernis!

Want to know more about the SANParks Honorary Rangers? Visit www.sanparkshr.org


One positive deed is worth more than a thousand critical words.


Top
 Profile  
 
 Post subject: Re: Green laser pointers
Unread postPosted: Sun Oct 04, 2009 8:41 pm 
Offline
Senior Virtual Ranger
Senior Virtual Ranger
User avatar

Joined: Sun Jul 22, 2007 6:10 pm
Posts: 1230
Location: New Brunswick, Canada
just googled it Imberbe :redface:
I guess some of them should be used with caution :naughty: , as I read they can burn plastic :shock: and some military use the more powerful ones to disarm enemies? :big_eyes:
laser pointers were banned from some schools here as the students were using them in 'not for use' ways :roll:
If you feel this post is too serious...please delete

_________________
CC & Lockie's Travel Tale


Top
 Profile  
 
 Post subject: Re: Green laser pointers
Unread postPosted: Sun Oct 04, 2009 9:01 pm 
Offline
Senior Virtual Ranger
Senior Virtual Ranger
User avatar

Joined: Sun Jul 22, 2007 6:10 pm
Posts: 1230
Location: New Brunswick, Canada
Quote:
What are these lasers that everyone is raving about? In case you were wondering - "name of supplier" isn't in regular low power (5mW) presentation or key chain laser pointers. We sell the highest powered green laser pointers in the world. Our green lasers are so bright and powerful they can burn, slash and melt plastic or, if you are so inclined, light your smoke. The green lasers create a beam you can see for miles in dark conditions. Our high-powered green laser pointers are used by the US military to disorient and intimidate the enemy.

This is what I was referring to joshilewis. I will NOT be posting where this quote was taken from. The price quoted was US$99 for 20mW
I agree it would be a useful tool for stargazing, but in the wrong hands and for the wrong purpose...a weapon!

_________________
CC & Lockie's Travel Tale


Top
 Profile  
 
 Post subject: Re: Green laser pointers
Unread postPosted: Sun Oct 04, 2009 9:16 pm 
Offline
Junior Virtual Ranger
Junior Virtual Ranger
User avatar

Joined: Tue May 19, 2009 2:15 pm
Posts: 1902
Location: Johannesburg - too far from the closest Sanpark
I was agreeing with you :)
Most reviews I've read online claim that manufacturer's claims are usually exaggerated, i.e. the lasers can't burn plastic or pop balloons etc. They're still very dangerous though.

_________________
The 'mite formerly known as joshilewis

FGASA Level 1 Guide

Glen Reenen TR

15-18 June: Berg-en-dal


Top
 Profile  
 
 Post subject: Re: Green laser pointers
Unread postPosted: Mon Oct 05, 2009 8:34 am 
Offline
Junior Virtual Ranger
Junior Virtual Ranger
User avatar

Joined: Tue May 19, 2009 2:15 pm
Posts: 1902
Location: Johannesburg - too far from the closest Sanpark
Lockie wrote:
I knew you agreed with me and thanks josh, I just wanted to drive my 'point' home :lol:
I was amazed by the Southern Sky both in the daylight, but especially at night! EVERYTHING was so different from what we were used to, and at time I was kicking myself I didn't include an astronomy book with the rest of the bird, reptile, mammals books we had used while visiting that most beautiful spots most of you call home

Yeah it is very different. I've made a point of looking at N Hemisphere stars on two occasions, both in deserts (in Israel and India) and our stars are much more impressive.

I'm slowly starting to get into the finer aspects of guiding/ecology etc, including star gazing (I wouldn't quite call it astronomy yet).

For book recommendations check this topic.

I wonder if there's a market for a 'safari book' rental service?

_________________
The 'mite formerly known as joshilewis

FGASA Level 1 Guide

Glen Reenen TR

15-18 June: Berg-en-dal


Top
 Profile  
 
 Post subject: Re: Green laser pointers
Unread postPosted: Wed Nov 04, 2009 2:40 pm 
Offline
Junior Virtual Ranger
Junior Virtual Ranger
User avatar

Joined: Tue May 19, 2009 2:15 pm
Posts: 1902
Location: Johannesburg - too far from the closest Sanpark
Preliminary review: I've been playing with my pointer over a few nights, but I haven't had a chance to do some decent star gazing due to the weather and light pollution in Jo'burg.

So far I am very impressed. The laser dot can be seen clearly at 50m away in twilight, and possibly more (I haven't had the chance to check further distances yet). The beam can be seen indoors with curtains closed (assuming decent curtains). The beam can also be seen clearly while pointed at a full moon.

All in all, I am very impressed.

The only real downside is it seems to eat batteries (rechargables); and the beam intensity drops after a few minutes of continuous usage (not sure if its batteries, heat or a low quality unit).
I paid under USD20 for mine from Amazon (with a traveling relative kindly bringing it back).

I can't wait to try it out 'for real'.

I'll try taking some photos and posting them soon, when the weather here clears a little.

_________________
The 'mite formerly known as joshilewis

FGASA Level 1 Guide

Glen Reenen TR

15-18 June: Berg-en-dal


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 43 posts ]  Go to page Previous  1, 2, 3  Next



Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group

Webcams Highlights

Addo Nossob Orpen Satara
Addo Nossob Orpen Satara
Submitted by Lorinda at 17:36:15 Submitted by Lorinda at 20:15:52 Submitted by Lorinda at 20:21:36 Submitted by Karin Mitton at 08:52:42