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IMBERBE#13: ASTRONOMY QUIZ (RV) -IPY

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cybeR@NGER
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Unread post by cybeR@NGER » Fri Feb 08, 2008 3:55 pm

Oops, you're quite right, Imb. :redface:

I changed my answer after realising my mistake (it still appeared as Rigel in RSS feed).
Rigel is indeed a blue Supergiant and not as old as the others.

So, how about Aldebaran ?
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Imberbe
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Unread post by Imberbe » Fri Feb 08, 2008 3:59 pm

Yes! Aldebaran is 100%

The three are: Betelgeuse, Aldebaran and Antares.

They are visibly red, even with the naked eye.

Over to you cybeR@NGER!
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Unread post by cybeR@NGER » Fri Feb 08, 2008 4:11 pm

Sorry about that, Imb, my connection at work was playing up, so I didn't see your post, when I changed the answer.

I'll post a question later, from home.
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cybeR@NGER
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Unread post by cybeR@NGER » Fri Feb 08, 2008 6:20 pm

Ok, easy simple one: (baby steps, Freda :wink: )

In which world, other than the Earth, were dust storms observed ?

You gotta be quick on the trigger, on this one. :lol:
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Freda
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Unread post by Freda » Fri Feb 08, 2008 6:44 pm

Mars :?

I even had to google for that, but learnt something new :wink:

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Unread post by cybeR@NGER » Fri Feb 08, 2008 7:13 pm

Freda wrote:Mars :?
:clap:

"In 1971 and 2000, dust storm is Mars grew to immense propotions, covering 100% of the planet and obscuring it's surface from telescopes and spacecraft."
Source: Guiness World Records 2008

Over to you, Freda, and please K.I.S.S. You know the rules ... :wink:
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Unread post by christo » Sat Feb 09, 2008 5:09 am

Thanks for the info on Ceres.

Eish to think I struggle to keep up with all the changes in classification, as man changes his perspective every now and then about what nature has made millions of years ago!
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Freda
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Unread post by Freda » Sat Feb 09, 2008 5:16 am

cybeR@NGER wrote:Over to you, Freda, and please K.I.S.S. You know the rules ... :wink:

:roll:
How can I find north on a clear night by only using the stars?

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Unread post by jonty1 » Sat Feb 09, 2008 5:06 pm

I want to say by using the Southern cross, but i think it is used to find South :?
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Imberbe
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Unread post by Imberbe » Sat Feb 09, 2008 6:06 pm

If you know where South is you probably know where North is as well ... :wink:
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Unread post by Wild about cats » Sat Feb 09, 2008 6:27 pm

I think when its full moon you trace a line (with you finger or in your mind) from the one point to the other and if you keep going in a straight line, it will reach north.

i.e. The moon is like a smile, so you trace (with your finger or in your mind) from one point of the 'mouth' to the other and if you keep tracing the line towards the horizon, where it touched will be north.

B.T.W. This isn't thumbsucked, the guide at Olifants told us on our astronomy drive. :D
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christo
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Unread post by christo » Sat Feb 09, 2008 10:26 pm

Following orions Belt?

180 degrees opposite South?

I gather the above do not count if it is clouded :lol:
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Unread post by Wild about cats » Sun Feb 10, 2008 2:57 pm

Freda wrote:How can I find north on a clear night by only using the stars?


I guess mine doesn't count then... oops :redface:
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Unread post by Karl Jaacks » Mon Feb 11, 2008 7:40 am

You can watch where the sun sets or the moon rises.
The megelini clouds are in the south too.
The zodiac signs rise in the east set in the west.
planets rise in the east set in the west.
If you are in the north and you cant see the southern cross I here you can use the big dipper.

I am sure there are many more ways.

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Unread post by Jeanus » Mon Feb 11, 2008 12:25 pm

To expand on using Orion.

I hope this makes sense because I have no idea how to upload a drawing so I will try to describe it

You take a line down through the three bright stars of Orions belt.You can then form a V or cup by taking a line from the last star up to the faint star off to the side. If you then take a line along the faint stars that make up the scabbard through the V (forming an arrow) to the horizon this indicates north.
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