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Fraser
2005-Nov-30, 07:00 AM
SUMMARY: This image taken by the Chandra X-Ray Observatory shows the ongoing expansion of supernova SN 1970G, which exploded more than 35 years ago. Astronomers estimate that the shockwaves from the supernova will crash into shells of material shed by the star about 25,000 years ago, completing its transition into a supernova remnant.

View full article (http://www.universetoday.com/am/publish/sn_1970g_supernova.html)
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trinitree88
2005-Nov-30, 09:44 PM
Always glad to hear about supernovae. Let's see...about 8 Solar masses of dust, ~ 8 million times the mass of the Earth. Who's going to sweep up all this stuff? Save the platinum, gold, silver, iridium, and other valuables please. Ciao. Pete.

Don M.
2005-Dec-01, 12:20 PM
SUMMARY: This image taken by the Chandra X-Ray Observatory shows the ongoing expansion of supernova SN 1970G, which exploded more than 35 years ago. Astronomers estimate that the shockwaves from the supernova will crash into shells of material shed by the star about 25,000 years ago, completing its transition into a supernova remnant.

View full article (http://www.universetoday.com/am/publish/sn_1970g_supernova.html)
What do you think about this story? post your comments below.

Can anyone tell me the location of this supernova? 35 years ago I was looking up in the sky and I saw something that looked like a star exploding. It was a brightning and expansion of a circle of light in the sky. It grew for about 5 seconds, then just faded into black. Is it possible that I saw this (or another) supernova happening? (I was in a very dark sky location at the time).

trinitree88
2005-Dec-01, 01:42 PM
Can anyone tell me the location of this supernova? 35 years ago I was looking up in the sky and I saw something that looked like a star exploding. It was a brightning and expansion of a circle of light in the sky. It grew for about 5 seconds, then just faded into black. Is it possible that I saw this (or another) supernova happening? (I was in a very dark sky location at the time).
Don, you more likely saw a small comet, minicomet. They impact the upper atmosphere and do just as you described. Used to make the NORAD guys very nervous. Pete.

Dave Mitsky
2005-Dec-01, 02:19 PM
Has there ever been a verified naked-eye sighting of a minicomet impact? I've never heard of one.

http://www.badastronomy.com/bitesize/minicomet.html

Don,

Perhaps it was a point (head-on) meteor that you saw.

http://www.stargazing.net/kevin/phenomena.htm

It could have also been a flare from a satellite. (Yes, satellites other than the Iridium series can flare too.)

Supernovae don't suddenly flare into visibility and then disappear. At any rate, there hasn't been a bright naked-eye supernova (SN 1987a in the Large Magellanic Cloud reached a relatively modest 2.9 magnitude) in four centuries.

http://www.daviddarling.info/encyclopedia/S/supernova_1987A.html

I've seen dozens of supernovae in other galaxies through telescopes but they rarely are brighter than 13th or 14th magnitude.

http://www.rochesterastronomy.org/snimages/

Dave Mitsky

NEOWatcher
2005-Dec-01, 02:46 PM
Can anyone tell me the location of this supernova? 35 years ago I was looking up [snip]
Don, you more likely [snip]
Sounds more like a HaHa... Don's probably 34 1/2 yrs old. :shifty:
Now lets see, 5 seconds at the speed of light... a ring with diameter under 3million miles, at a distance of 35 light years... very distinguishable:)

HesDeadJim
2005-Dec-02, 03:51 AM
Hi Folks

I'm new
I'm a professional musician
Please excuse anything I might add or subtract as I am not very knowledgable
but I am great at partys with dip.......


....supernovas? I'm waiting for Betelgeuse to go....THAT will be the ultimate light show!!!....


Inset pic looks like some kind of grav lensing going on, doesn't it?


...yeah yeah, I know: DON'T give up my night job :)