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ScottW

Sentient Life-form

Joined: 2004-May-10 Location: United States Posts: 45
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Posted: 2004-September-01 at 7:09pm | IP Logged
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I recently finished watching a special on the Science Channel about super massive black holes at the center of all galaxies.
While the Milky Way's black hole is not currently feeding, it seems that some of them are, which result in a quasar (a super-heated disc of gas) at the center of the galaxy and giant gas jets spewing forth.
Which got me to thinking - if you were on a planet in one of these active galaxies, and facing the galactic core, what would the night sky look like? How bright would it be? Granted, you'd be tens of thousands of light years away at the edge of the galaxy, but I imagine it would still be quite a show.
So, get to work, and share your interpretations. Mine is on the way.
-Scott
Edited by ScottW
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Dinyctis

Star-faring Vagabond

Joined: 2003-September-24 Location: United States Posts: 569
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Posted: 2004-September-01 at 8:33pm | IP Logged
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you would see a huuuuuge white stripe in the night sky
As of now, we see a huge white stripe, but covered by the darkness of
some of the arms. This gives it the look of spilled milk, and
that is why our galaxy is called the Milky Way. Of course, most
galaxies look like that, but the Romans didnt know that.
Now, if you were close to the center to the galaxy so that you
wouldnt have the massive light blocked out by the arms, then you
would have a huge white stripe going across the sky.
This of course, considering that you weren't in a city or any other places with high levels of light pollution.
However, all of this would happen if the planet was facing towards the
center of the galaxy. And depending on where on the planet one is
actually looking at the sky
Obviously, this white stripe would have a slight bulge at the center, but barely noticeable.
And its called Quasar
Edited by Dinyctis
__________________ Skyetis
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ScottW

Sentient Life-form

Joined: 2004-May-10 Location: United States Posts: 45
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Posted: 2004-September-01 at 8:49pm | IP Logged
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Check my spelling again, Captian Smarty-Pants...and no, I didn't go and change the spelling after reading your post. (In seriousness, thanks for ponting that out - sometimes my fingers work faster than my brain.)
I realize that the galactic dust blocks most of the light from galaxies like our own - where the black hole at the center isn't feeding - but in an active galaxy, where the black hole is swallowing intense amounts of gas and dust and super-heating massive amounts of gas and dust swirling around it, the light would be intense. Much brighter than a supernova, and those are visible from earth in other galaxies. At the very least, the jets would be visible.
Besides, your planet doesn't have to be at the edge of the galaxy, it can be closer to the center. I just thought it would be an interesting exercise.
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Dinyctis

Star-faring Vagabond

Joined: 2003-September-24 Location: United States Posts: 569
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Posted: 2004-September-01 at 9:54pm | IP Logged
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You gotta take a few things into account.
The pictures of galaxies that you see on the internet, be it from the
hubble or any other telescope, is nothing but the result of the "lens"
being open for a loooooong time. Some galaxy pictures are the
results of lenses being open for 6 hours.
Why? because the longer the shutter is open, the more photons it
catches, and thus the more detail. So the pictures of galaxies
with amazingly bright centers look like that because the shutter was
left open for a long time. Hell, they have to, because they are
too far away, and a simple snapshot would just capture a white
spec. Therefore, you would be able to see quite some detail if
you held any lens open, but even then, there are more things to
consider.
1) You wouldn't be able to see jets. Maybe you'd see something
really faint, but you probably wouldn't see it, especially if you're
sitting at the edge of the galaxy. Why? because galaxies are
rather flat and have just a few thousand light years of height.
So, with all of the galactic dust in the way, you would not see these
jets if you were at the edge of the galaxy. It might look just
like the milky way, but perhaps a bit brighter, with a bulge in the
middle, assuming that you were facing towards the center.
It would be an interesting exercise, for the now generic terragen/space
mix, or photography with top extended and space stuff over it.
Edited by Dinyctis
__________________ Skyetis
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Asmodeus

Planetary Explorer

Joined: 2005-August-28 Location: New Zealand Posts: 438
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Posted: 2005-September-01 at 6:34am | IP Logged
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it's called the milkway beacuse galaxy is the greek word for milk, but i suspose you could say that it does have a spilled milk look
__________________ Immortality is a lonely existence in a universe devoid of life.
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Asmodeus

Planetary Explorer

Joined: 2005-August-28 Location: New Zealand Posts: 438
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Posted: 2005-October-22 at 4:00pm | IP Logged
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further to new updates about the surrounding of sagitarrius a*, our black hole is surrounded by young stars and very large ones
__________________ Immortality is a lonely existence in a universe devoid of life.
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