PlanetZ forums - scopeusers.com

Posted: **Thu Dec 16, 2004 7:54 am**

http://www.jb.man.ac.uk/~pulsar/Educati ... ounds.html

Posted: **Thu Dec 16, 2004 10:34 am**

"The surface of this star is moving at about 1/7 of the velocity of light "

Can we do that with Flexor?

<font size=-1>[ This Message was edited by: wayne on 2004-12-16 10:35 ]</font>

Posted: **Thu Dec 16, 2004 10:38 am**

Woaw! The Vela Pulsar really rocks!

Posted: **Thu Dec 16, 2004 10:56 am**

i just pushed on that button to here the sound of it and... welll.... i'm at work right now and the speakers of my laptop went berserk

my boss asked if i had a backup of my latest devs

he got worried!

Posted: **Thu Dec 16, 2004 11:11 am**

"The surface of this star is moving at about 1/7 of the velocity of light and illustrates the enormous gravitational forces which prevent it flying apart due to the immense centrifugal forces."

Gnnnnnaaaarrrrgggghhhh!!!!

*pub physics mode: ON*

There are no centrifugal forces. Any point on the surface of the pulsar wishes to move away tangentially and it's a centripetal force (its gravity) which holds it all together.

*pub physics mode: OFF*

Royston

Posted: **Thu Dec 16, 2004 11:15 am**

Where can I buy a radio telescope

Posted: **Thu Dec 16, 2004 11:26 am**

Build one!

http://my.integritynet.com.au/purdic/ra ... escope.htm

There's quite a lot of info out there on t'web.

I built myself a 12" reflector when I was a kid, but as our school had quite a big radio telescope project running I used that rather than try to make my own.

(The reflector was much harder, though!)

Royston

<font size=-1>[ This Message was edited by: Counterparts on 2004-12-16 11:27 ]</font>

Posted: **Thu Dec 16, 2004 11:59 am**

That is very cool, but in my "urban dwelling" one can only pick up power transformers 60Hz hums, which is not fun at all.

Posted: **Thu Dec 16, 2004 12:47 pm**

On 2004-12-16 11:11, Counterparts wrote:

Any point on the surface of the pulsar wishes to move away tangentially

Royston

Hey Royston, centrifugal forces are exactly that....
They exist, and are balancing centripetal opposite ones, otherwise it would collapse (probably) in a black hole...

Posted: **Thu Dec 16, 2004 2:13 pm**

There are som nice ones here as well, if you'll excuse the announcer voice on some of the stuff.

Some of it has been used by the Kronos quartet, must have sounded weird; as it is very hard to relate to these sounds, my brain keeps saying "OK - bad amateur recording from someones backyard near a railway intersection in gale force winds, mid 70's"

Stubbe

Posted: **Thu Dec 16, 2004 5:09 pm**

I'll probably use the voice of Professor Don Gurnett on that one. I like the way he sounds.

Posted: **Thu Dec 16, 2004 5:27 pm**

On 2004-12-16 11:26, Counterparts wrote:
...I built myself a 12" reflector when I was a kid, ...

(The reflector was much harder, though!)

oh yeah

I tried an 8 inch Newton those years, even made the curve of the mirror myself, which took an aweful lot of time in the cellar...
when it was finished for alloy coating, some student offered a readymade 2nd hand instrument of the same size for half the price of the coating...

cheers, Tom

Posted: **Thu Dec 16, 2004 10:13 pm**

Posted: **Thu Dec 16, 2004 10:16 pm**

Yet I wanne know who has right, CP or Alfonso...

Posted: **Mon Dec 20, 2004 6:50 am**

(psst! epic work in progress as we speak...I didn't spend three years getting a degree in Astronomy & Physics for nothing, y'know...)

Posted: **Mon Dec 20, 2004 8:45 am**

So I hope you remember Newton's third law of motion....

Posted: **Mon Dec 20, 2004 12:22 pm**

Not only that, I understand it too...

Posted: **Mon Dec 20, 2004 1:28 pm**

http://www.glenbrook.k12.il.us/gbssci/p ... u2l4a.html

From a guitar vid to bashing Michael Hedges to Newton. Gotta love the Z!

PlanetZ forums - scopeusers.com

The Sound of Pulsars