Deneb

What level of devastation will there be when Deneb explodes shortly (in
astronomical terms)?

"St.George" wrote in message
...
What level of devastation will there be when Deneb explodes shortly (in
astronomical terms)?


Who said Deneb was going to explode?

RM

"St.George" wrote in message
...
What level of devastation will there be when Deneb explodes shortly (in
astronomical terms)?


Who said Deneb was going to explode?

RM

If U mean on Earth, none.
It seem to be more than 3000 ly away (most distant of all bright stars in
sky)
Vega is much more "dangerous" in this case (only 25 ly), but still we speak
hypotetycally

Mysak


"St.George" wrote in message
...
What level of devastation will there be when Deneb explodes shortly (in
astronomical terms)?

If U mean on Earth, none.
It seem to be more than 3000 ly away (most distant of all bright stars in
sky)
Vega is much more "dangerous" in this case (only 25 ly), but still we speak
hypotetycally

Mysak


"St.George" wrote in message
...
What level of devastation will there be when Deneb explodes shortly (in
astronomical terms)?

In message , Ron Miller
writes

"St.George" wrote in message
...
What level of devastation will there be when Deneb explodes shortly (in
astronomical terms)?


Who said Deneb was going to explode?

Isn't it a good candidate for a supernova? (it's an A class giant,
70,000 times as bright as our Sun) I'd guess it will go in a few million
years.
But at 3000 light years it's too far away to be anything but a fantastic
spectacle. The FAQ (hint) says it would have to be within 30 light years
(10 parsecs) to be a danger, and there aren't any candidates that close.
But if it was that close, I'd guess you'd get a lot of high-energy stuff
hitting the upper atmosphere with bad effects lower down -climate
changes, mass extinctions, and so on.
--
"Forty millions of miles it was from us, more than forty millions of miles of
void"
Remove spam and invalid from address to reply.

In message , Ron Miller
writes

"St.George" wrote in message
...
What level of devastation will there be when Deneb explodes shortly (in
astronomical terms)?


Who said Deneb was going to explode?

Isn't it a good candidate for a supernova? (it's an A class giant,
70,000 times as bright as our Sun) I'd guess it will go in a few million
years.
But at 3000 light years it's too far away to be anything but a fantastic
spectacle. The FAQ (hint) says it would have to be within 30 light years
(10 parsecs) to be a danger, and there aren't any candidates that close.
But if it was that close, I'd guess you'd get a lot of high-energy stuff
hitting the upper atmosphere with bad effects lower down -climate
changes, mass extinctions, and so on.
--
"Forty millions of miles it was from us, more than forty millions of miles of
void"
Remove spam and invalid from address to reply.

Ron Miller wrote:

"St.George" wrote in message
...
What level of devastation will there be when Deneb explodes shortly (in
astronomical terms)?


Who said Deneb was going to explode?

Presumably it will eventually, and being a very luminous supergiant
its lifespan must be pretty short on the scale of such things,
measured in millions rather than billions of years. But it would be
expected to go through a red-giant stage first; while its slight
variability may be a sign that it's beginning to depart from the main
sequence, its green/white type-A spectrum indicates that it's at no
more than early middle age.

At any rate I wouldn't expect the solar system, at a distance on the
order of a kiloparsec, to experience anything like "devastation". The
supernova will likely be bright enough to be seen in the daytime, and
will give us a slightly higher than usual dose of X-rays, but I doubt
the earth would be otherwise affected.

Nearing the end of its life at a distance of four to five hundred
light-years, Betelgeuse would seem to be much more of an imminent
threat than Vega; another red supergiant 'in the terminal ward' is
Antares, at some 500-800 LY.

--
Odysseus

Ron Miller wrote:

"St.George" wrote in message
...
What level of devastation will there be when Deneb explodes shortly (in
astronomical terms)?


Who said Deneb was going to explode?

Presumably it will eventually, and being a very luminous supergiant
its lifespan must be pretty short on the scale of such things,
measured in millions rather than billions of years. But it would be
expected to go through a red-giant stage first; while its slight
variability may be a sign that it's beginning to depart from the main
sequence, its green/white type-A spectrum indicates that it's at no
more than early middle age.

At any rate I wouldn't expect the solar system, at a distance on the
order of a kiloparsec, to experience anything like "devastation". The
supernova will likely be bright enough to be seen in the daytime, and
will give us a slightly higher than usual dose of X-rays, but I doubt
the earth would be otherwise affected.

Nearing the end of its life at a distance of four to five hundred
light-years, Betelgeuse would seem to be much more of an imminent
threat than Vega; another red supergiant 'in the terminal ward' is
Antares, at some 500-800 LY.

--
Odysseus

Is Vega big enough to produce a supernova? I would guess it will produce
a nice quiet red giant.

In message , Mysak writes
If U mean on Earth, none.
It seem to be more than 3000 ly away (most distant of all bright stars in
sky)
Vega is much more "dangerous" in this case (only 25 ly), but still we speak
hypotetycally

Mysak


"St.George" wrote in message
...
What level of devastation will there be when Deneb explodes shortly (in
astronomical terms)?

--
"Forty millions of miles it was from us, more than forty millions of miles of
void"
Remove spam and invalid from address to reply.