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Explosions in the Sky: Supernovae Imminent?
SpaceRef ^ | 09/30/2004 | NASA

Posted on 10/01/2004 12:59:05 PM PDT by cogitator

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To: cogitator
What the Hell!

The EPA may me junk my 69 Super Nova for excessive X and Gamma ray emissions.... how come these guy get by?

101 posted on 10/01/2004 3:10:04 PM PDT by tophat9000 (Kerry's foreign policy..........."Mommy may I ?")
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To: Junior
Obiwan ( Admin Moderator), is our ONLY hope!


102 posted on 10/01/2004 3:13:10 PM PDT by JOE6PAK (The Pajamaheddin. The gadflies of the truth, the guerrillas of the ugly fact.)
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To: Jeremiah Jr

G-g-gamma ray PING!


103 posted on 10/01/2004 3:15:41 PM PDT by Thinkin' Gal
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To: Quix

Ping!


104 posted on 10/01/2004 3:19:31 PM PDT by Las Vegas Dave ("Let's roll" in 2004 ----- Vote for President Bush!)
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http://www.garabandal.org/warning.shtml

Only believers need apply.

I deliberately didn't put it as a hyperlink so mockers have to work a little harder to get there.

105 posted on 10/01/2004 3:25:10 PM PDT by steve86
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To: RadioAstronomer

Thanks!


106 posted on 10/01/2004 4:16:18 PM PDT by RightWingAtheist (<A HREF=http://www.michaelmoore.com>disingenuous filmmaker</A>)
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How many special people change
How many lives are living strange
Where were you when we were getting high?
Slowly walking down the hall
Faster than a cannon ball
Where were you while we were getting high?

Some day you will find me
Caught beneath the landslide
In a champagne supernova in the sky
Some day you will find me
Caught beneath the landslide
In a champagne supernova
A champagne supernova in the sky

Wake up the dawn and ask her why
A dreamer dreams she never dies
Wipe that tear away now from your eye
Slowly walking down the hall
Faster than a cannon ball
Where were you when we were getting high?

Some day you will find me
Caught beneath the landslide
In a champagne supernova in the sky
Some day you will find me
Caught beneath the landslide
In a champagne supernova
A champagne supernova in the sky

Cos people believe that they're
Gonna get away for the summer
But you and I, we live and die
The world's still spinning round
We don't know why
Why, why, why, why

How many special people change
How many lives are living strange
Where were you when we were getting high?
Slowly walking down the hall
Faster than a cannon ball
Where were you while we were getting high?

Some day you will find me
Caught beneath the landslide
In a champagne supernova in the sky
Some day you will find me
Caught beneath the landslide
In a champagne supernova
A champagne supernova in the sky

Cos people believe that they're
Gonna get away for the summer
But you and I, we live and die
The world's still spinning round
We don't know why
Why, why, why, why

How many special people change
How many lives are living strange
Where were you when we were getting high?
We were getting high
We were getting high
We were getting high
We were getting high


107 posted on 10/01/2004 4:19:07 PM PDT by Diddle E. Squat
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To: My2Cents
A clear justification for pre-emption.

... Unless there's a Galactic Test which should be applied.

108 posted on 10/01/2004 4:30:09 PM PDT by VadeRetro (A self-reliant conservative citizenry is a better bet than the subjects of an overbearing state.)
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To: RadioAstronomer

Might a gamma ray burst from a billion LY out be redshifted into the X-ray spectrum? If so, the X-rays could be nothing more than redshifted cosmic rays from a very distant receding supernova or collapsing black hole.


109 posted on 10/01/2004 4:31:20 PM PDT by longshadow
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To: RockinRight

i think we're both wrong. the moon reflects only 7% of the sunlight that hits it, but it sends out approximately 400,000 times less light (14 magnitudes dimmer). I had to get someone smart to explain it to me.


110 posted on 10/01/2004 5:03:39 PM PDT by the herald (i still like pudding; vanilla best)
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To: My2Cents
A series of earthquakes in California; hurricanes in Florida; Mt. St. Helens about to erupt; a near-miss with a killer asteroid the other day; and now the sky is exploding. What's up?

You forgot the giant fireball burning in the middle of our solar system.

111 posted on 10/01/2004 5:16:56 PM PDT by Harmless Teddy Bear (There is no Chaos. Only very complicated Order. (Presenting Lady Snuggles of the Lethal Yew in PJ's!)
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To: 50sDad
We better grab our towels and get off this rock!

Don't forget the Babel fish.

112 posted on 10/01/2004 5:22:02 PM PDT by reformed_democrat ("If it's not close, they can't cheat." -- Some very smart FReeper.)
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To: cogitator

hmmmm..dint these supernova happen like 1000s of years ago and we are only now detecting it?


113 posted on 10/01/2004 5:23:23 PM PDT by OhGeorgia
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To: cogitator

Where's Marvin the Martian and his Earth-shattering "KA-BOOM" when you need him?

(sigh)


114 posted on 10/01/2004 5:27:15 PM PDT by roaddog727 (The marginal propensity to save is 1 minus the marginal propensity to consume.)
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To: the herald
i think we're both wrong. the moon reflects only 7% of the sunlight that hits it, but it sends out approximately 400,000 times less light (14 magnitudes dimmer). I had to get someone smart to explain it to me.

To put it another way, only 7% of the sunlight that hits the moon gets reflected. But of that 7%, only a tiny portion gets reflected such that it intersects with the earth since it is radiated in all directions, so we only capture a very tiny percent of that 7%.

By analogy, it would be the difference in light between staring into a flashlight at night and seeing the light of that same flashlight reflected off a not-particularly-reflective distant object.

115 posted on 10/01/2004 5:32:04 PM PDT by tortoise (All these moments lost in time, like tears in the rain.)
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To: tortoise
To put it another way, only 7% of the sunlight that hits the moon gets reflected. But of that 7%, only a tiny portion gets reflected such that it intersects with the earth since it is radiated in all directions, so we only capture a very tiny percent of that 7%.

And yet, on a clear enough night, one can see the filled-in outline of the circle on the dark side of a crescent moon. The area beyond the terminator is shining by ... reflected Earthshine. This is VERY dim, but often noticeable.

Which is to say you have an object (Earth) shining by reflected sunlight. We know from photographs taken on the moon thirty years ago that it is glowing as a big blue ball in the Lunar sky. Some little bit of that light finds its way back to Earth.

The distances involved and the inverse square law dictate that the losses should be incredible. They are. Nevertheless, the original source, the sun, is bright enough that you can still see SOMETHING brighter than the background on the dark side of a crescent moon if you look closely on a very clear night.

116 posted on 10/01/2004 5:52:56 PM PDT by VadeRetro (A self-reliant conservative citizenry is a better bet than the subjects of an overbearing state.)
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To: cogitator

Eta Carinae - This is the one to watch.
100X as massive as the sun
Brightened in the 1800's to be the 2nd brightest star in
the sky for decades, ejecting the plume observed by Hubble
8,000 light years away
It has probably already blown and we are just waiting for the shout.
117 posted on 10/01/2004 6:01:18 PM PDT by UnbelievingScumOnTheOtherSide (Give Them Liberty Or Give Them Death! - Islam Delenda Est! - Rumble thee forth...)
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To: Rutles4Ever
Quick! Did Bush reduce spending on NASA last year?

Bush could have opted to keep Earth safe. Instead, he gave us this lousy tax cut!

118 posted on 10/01/2004 6:47:32 PM PDT by kcar (theUNsucks.com)
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To: kcar

LOL!


119 posted on 10/01/2004 7:07:58 PM PDT by BenLurkin (We have low inflation and and low unemployment.)
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To: UnbelievingScumOnTheOtherSide

120 posted on 10/01/2004 7:11:37 PM PDT by BenLurkin (We have low inflation and and low unemployment.)
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