Search found 176 matches

by Empeda2
Wed Nov 23, 2005 12:41 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: History of the Universe
Replies: 27
Views: 7053

S. Bilderback wrote:There is dialog ongoing about most stars having an Fe shell over the core, there are traces of Fe that raises questions - the evidence hasn't grabbed me but it also hasn't been ruled out.
Presumably that's only for later generation stars - got any links? Sounds interesting :)
by Empeda2
Wed Nov 23, 2005 12:35 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Solar Journey
Replies: 9
Views: 2970

Hi again harry,

You keep bringing up this stars being ejected from black holes thing - but have yet to produce anything to support it - for a number of cosmological and stellar models it just doesn't add up.

I'm open minded - but I like to see statements backed-up :wink:
by Empeda2
Wed Nov 23, 2005 12:32 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Question about black holes
Replies: 14
Views: 5476

hmmm..surely the higher density part is more likely to be attracted to the black hole.?
by Empeda2
Wed Nov 23, 2005 12:30 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: stella core
Replies: 49
Views: 8904

Why can't fusion reactions happen in the core? Also, are you saying that 'normal' matter cannot condense enough to produce the gravity required to hold even a small star like our sun together - what are you proposing that compact objects such as neutron stars are composed of? It's all very interesti...
by Empeda2
Wed Nov 23, 2005 12:25 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: The Andromeda Galaxy
Replies: 35
Views: 10268

Billions may have been an exagerration - try millions:

http://www.anzwers.org/free/universe/universe.html

Incidently - this is a well cool map that I think everyone would be quite interested in 8)
by Empeda2
Wed Nov 23, 2005 12:23 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Open Cluster of stars (APOD 18/11/05)
Replies: 21
Views: 7168

Yeah, not entirely convincing :!:
by Empeda2
Wed Nov 23, 2005 12:20 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Non-Abelian Gravity
Replies: 3
Views: 1727

:? I might be able to offer an answer but I don't understand the question :!:
by Empeda2
Tue Nov 22, 2005 4:29 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Travelling Light Year Distances
Replies: 83
Views: 25775

Exactly - unfortunately wouldn't your mass also be infinite - therefore requiring an infinite force to propel it to that stage?
:?
by Empeda2
Tue Nov 22, 2005 4:27 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: The Ring Galaxy
Replies: 5
Views: 2727

True - but if it passes through the middle, it'll initially be dragged on way, and then the other producing a more ripply type effect?
by Empeda2
Tue Nov 22, 2005 1:42 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: History of the Universe
Replies: 27
Views: 7053

Re: History Of The Universe.

Our sun may last over 5 billion years but! its IRON shell will be due to be expelled by the great ineternal forces of the sun's core. Plus, Iron is the most stable element - the suns does not have anywhere near the internal pressure to fuse iron - yes, there might be trace amounts as it's a second ...
by Empeda2
Tue Nov 22, 2005 1:39 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: The Ring Galaxy
Replies: 5
Views: 2727

Maybe - but a ripple on a pond moves perpendicular to the distrubance that caused it.
by Empeda2
Tue Nov 22, 2005 1:37 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: stella core
Replies: 49
Views: 8904

Yes, but there's a slight insufficient pressure inside the core of the sun to produce fusion reactions - we have to employ the uncertaintly principle and quantum tunnelling to explain that - so surely there is no where near enough density in the other layers to produce fusion reactions? Also, these ...
by Empeda2
Tue Nov 22, 2005 1:33 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: At the Center of the Milky Way
Replies: 47
Views: 14100

Re: Time travel

Light allows us to communicate. We can see objects in the past. If we move away from planet earth at the speed of light the time clock receiving info from earth will remain constant. Hi harry, that's not strictly true though is it? We enter all sorts of relativity problems here do we not? Light tra...
by Empeda2
Tue Nov 22, 2005 1:26 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: The Andromeda Galaxy
Replies: 35
Views: 10268

there are an awful lot more than 9 superclusters....try 9 billion at least... The universe is expanding in the sense that the medium of our universe is expanding - we're not expanding into anything, everything is exanding away from everything else. You cannot think of the big bang as an explosion - ...
by Empeda2
Tue Nov 22, 2005 1:16 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Open Cluster of stars (APOD 18/11/05)
Replies: 21
Views: 7168

Cheers Harry - they're really cool :D I still haven't seen anything mind about Stars being ejected from BHs, there's the mass ejection that we all know about, and there's talk of this ejection shockwave triggering star formation, but nothing about actual stars being ejected. It's a weird and wonderi...
by Empeda2
Tue Nov 22, 2005 1:12 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: The Missing Craters APOD Nov.21, 2005
Replies: 13
Views: 4526

That would imply that it is very new and this is unlikely?
by Empeda2
Tue Nov 22, 2005 1:10 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Asteroid Itokawa Formed By Slow Collision Of Two Asteroids?
Replies: 4
Views: 2758

Sounds like an interesting idea - it would imply a very low density I would have thought - this istrue for a lot of asteroids but is it low enough?
by Empeda2
Mon Nov 21, 2005 2:12 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: At the Center of the Milky Way
Replies: 47
Views: 14100

Re: Wormhole

harry wrote: But!!!!! worm holes and time travel are not possible.
You seem very sure of that - do you have a direct line? :wink:
by Empeda2
Mon Nov 21, 2005 2:08 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Open Cluster of stars (APOD 18/11/05)
Replies: 21
Views: 7168

But do you have any links (as in studies, reports, investigation results) about this theory? I have to admit that it's not one that I've come across...

I'm not sure that this theory would explain dusty nebulae, re: Pillars of Creations (and the new Spitzer Mountains of creation of course).
by Empeda2
Fri Nov 18, 2005 12:44 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Open Cluster of stars (APOD 18/11/05)
Replies: 21
Views: 7168

How would you explain the dust clouds around young clusters - for example the Pleiades?
by Empeda2
Fri Nov 18, 2005 12:42 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Travelling Light Year Distances
Replies: 83
Views: 25775

that's a very small galaxy..... :!:
by Empeda2
Fri Nov 18, 2005 12:41 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Core of a star
Replies: 6
Views: 2838

Is that just an opinion of yours?

How would that explain the Helium content of stars?
by Empeda2
Fri Nov 18, 2005 12:36 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Lunation
Replies: 14
Views: 5899

You reckon? To quote D. Adams:

About 13 Billion years ago the universe was created suddenly in a big bang. This made a lot of people very angry and is wildly regarded as a bad move.....

:lol:
by Empeda2
Thu Nov 17, 2005 9:39 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Lunation
Replies: 14
Views: 5899

The orbit of the Moon has about a 10 degree inclination in relation to the Equator, most other naturally orbiting bodies stay with in 1 or 2 degree of the host object's rotation, so in this respect it probably quite rare. Is this partly why they believe that the moon may once have been part of the ...
by Empeda2
Mon Nov 14, 2005 12:40 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: spirit tracks missed!
Replies: 2
Views: 1928

They're towards the centre/right of the panorama in the slightly darker 'basin'-type area....you'll have to scroll horizontally on the APOD site to see the whole image (or click on the image of course) :wink: