I suppose it depends on where you define the edge to be, but Wikipedia says a radius of 50,000 to 60,000 light years.starsurfer wrote:I thought the radius of the Milky Way was approximately 100,000 light years?Ann wrote:Well, that depends.ta152h0 wrote:how far does " nearby " have to be to not be " nearby " anymore ?
Since the approximate radius of the Milky Way is about 50,000 light-years, a supernova 7,000 light-years away is pretty nearby.
Ann
APOD: Supernova Remnant Puppis A (2014 Sep 12)
Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)
- rstevenson
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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)
The diameter of the Milky Way is about 100,000 to 120,000 ly.starsurfer wrote:I thought the radius of the Milky Way was approximately 100,000 light years?
Rob
Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)
Nope. diameter is 100k. Radius is 50k.starsurfer wrote:I thought the radius of the Milky Way was approximately 100,000 light years?Ann wrote:Well, that depends.ta152h0 wrote:how far does " nearby " have to be to not be " nearby " anymore ?
Since the approximate radius of the Milky Way is about 50,000 light-years, a supernova 7,000 light-years away is pretty nearby.
Ann
Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)
starsurfer wrote:
I thought the radius of the Milky Way was approximately 100,000 light years?
Wikipedia wrote:
The Milky Way is a barred spiral galaxy some 100,000–120,000 light-years in diameter, which contains 100–400 billion stars.
That would be 50-60 thousand light-years in radius.
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk. — Garrison Keillor
alive to the gentle breeze of communication, and please stop being such a jerk. — Garrison Keillor
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Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)
Oh I must have got the two mixed up!
Re: APOD: Supernova Remnant Puppis A (2014 Sep 12)
I admit, you had me confused. I had to go look to make sure.
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk. — Garrison Keillor
alive to the gentle breeze of communication, and please stop being such a jerk. — Garrison Keillor