Mysterious hot spots observed in Betelgeuse

On a side note, one of my goals in life is to have a life long enough to
see Betelgeuse explode as a supernova. It must be spectacular to be able
to see an astronomical object besides the Sun during the daylight hours!
Betelgeuse may be the only star close enough to become bright enough to
see in the daylight. I don't know if anything like this was ever seen on
Earth before, but if it was, then it must've been the dinosaurs or the
amoebas who saw it back then. If it was the dinos, then they must've
been simply puzzled by the good nocturnal hunting conditions that were
suddenly available. If it was the amoebas & algaes, then they must've
just been surprised by how easy it was to photosynthesize at night.

The hot spots appear on opposite sides of Betelgeuse, separated by about half the star’s visual diameter. They have a temperature of about 6700°–8500° Fahrenheit (3700°–4700° Celsius), much higher than the average temperature of the star’s radio surface (some 1700° F [930° C]) and even higher than the 6000° F (3300° C) visual surface. The arc of cool gas lies almost 4.5 million miles (7.4 billion kilometers) away from the star — about the same as Pluto’s farthest distance from the Sun. Scientists estimate the gas has a mass almost two-thirds that of the Earth and a temperature of only –190° F (–123° C).

Mysterious hot spots observed in Betelgeuse - Astronomy Magazine
http://www.astronomy.com/~/link.aspx...f-ae413109c481

Yousuf Khan

On Fri, 26 Apr 2013 20:31:11 -0400, Yousuf Khan
wrote:

On a side note, one of my goals in life is to have a life long enough to
see Betelgeuse explode as a supernova. It must be spectacular to be able
to see an astronomical object besides the Sun during the daylight hours!
Betelgeuse may be the only star close enough to become bright enough to
see in the daylight. I don't know if anything like this was ever seen on
Earth before, but if it was, then it must've been the dinosaurs or the
amoebas who saw it back then. If it was the dinos, then they must've
been simply puzzled by the good nocturnal hunting conditions that were
suddenly available. If it was the amoebas & algaes, then they must've
just been surprised by how easy it was to photosynthesize at night.

The 1054 supernova that produced the Crab Nebula was visible during
the day for about three weeks. Betelgeuse is about one tenth the
distance of the Crab Nebula, so if it's a similar supernova it would
be 100 times brighter.

On Fri, 26 Apr 2013 20:39:42 -0500, Mark Sieving
wrote:

On Fri, 26 Apr 2013 20:31:11 -0400, Yousuf Khan
wrote:

On a side note, one of my goals in life is to have a life long enough to
see Betelgeuse explode as a supernova. It must be spectacular to be able
to see an astronomical object besides the Sun during the daylight hours!
Betelgeuse may be the only star close enough to become bright enough to
see in the daylight. I don't know if anything like this was ever seen on
Earth before, but if it was, then it must've been the dinosaurs or the
amoebas who saw it back then. If it was the dinos, then they must've
been simply puzzled by the good nocturnal hunting conditions that were
suddenly available. If it was the amoebas & algaes, then they must've
just been surprised by how easy it was to photosynthesize at night.

The 1054 supernova that produced the Crab Nebula was visible during
the day for about three weeks. Betelgeuse is about one tenth the
distance of the Crab Nebula, so if it's a similar supernova it would
be 100 times brighter.


If Betelgeuse goes supernova there is a pretty good chance you can say
bye bye to life on earth

On 4/26/13 7:31 PM, Yousuf Khan wrote:
On a side note, one of my goals in life is to have a life long enough to
see Betelgeuse explode as a supernova. It must be spectacular to be able
to see an astronomical object besides the Sun during the daylight hours!
Betelgeuse may be the only star close enough to become bright enough to
see in the daylight. I don't know if anything like this was ever seen on
Earth before, but if it was, then it must've been the dinosaurs or the
amoebas who saw it back then. If it was the dinos, then they must've
been simply puzzled by the good nocturnal hunting conditions that were
suddenly available. If it was the amoebas & algaes, then they must've
just been surprised by how easy it was to photosynthesize at night.

The hot spots appear on opposite sides of Betelgeuse, separated by
about half the star’s visual diameter. They have a temperature of
about 6700°–8500° Fahrenheit (3700°–4700° Celsius), much higher than
the average temperature of the star’s radio surface (some 1700° F
[930° C]) and even higher than the 6000° F (3300° C) visual surface.
The arc of cool gas lies almost 4.5 million miles (7.4 billion
kilometers) away from the star — about the same as Pluto’s farthest
distance from the Sun. Scientists estimate the gas has a mass almost
two-thirds that of the Earth and a temperature of only –190° F (–123° C).

Mysterious hot spots observed in Betelgeuse - Astronomy Magazine
http://www.astronomy.com/~/link.aspx...f-ae413109c481


Yousuf Khan

You don't count Kepler's Supernova?
http://en.wikipedia.org/wiki/Kepler's_Supernova

On 4/26/13 8:46 PM, wrote:
On Fri, 26 Apr 2013 20:39:42 -0500, Mark Sieving
wrote:

On Fri, 26 Apr 2013 20:31:11 -0400, Yousuf Khan
wrote:

On a side note, one of my goals in life is to have a life long enough to
see Betelgeuse explode as a supernova. It must be spectacular to be able
to see an astronomical object besides the Sun during the daylight hours!
Betelgeuse may be the only star close enough to become bright enough to
see in the daylight. I don't know if anything like this was ever seen on
Earth before, but if it was, then it must've been the dinosaurs or the
amoebas who saw it back then. If it was the dinos, then they must've
been simply puzzled by the good nocturnal hunting conditions that were
suddenly available. If it was the amoebas & algaes, then they must've
just been surprised by how easy it was to photosynthesize at night.

The 1054 supernova that produced the Crab Nebula was visible during
the day for about three weeks. Betelgeuse is about one tenth the
distance of the Crab Nebula, so if it's a similar supernova it would
be 100 times brighter.


If Betelgeuse goes supernova there is a pretty good chance you can say
bye bye to life on earth


No--Too far away. But it will be bright in the sky.

On 4/26/13 8:46 PM, wrote:


If Betelgeuse goes supernova there is a pretty good chance you can say
bye bye to life on earth



See: http://stars.astro.illinois.edu/sow/betelgeuse.html

If it were to explode today, it would become as bright as a gibbous
Moon, would cast strong shadows on the ground, and would be seen
easily in full daylight. Birthplace was far away. The star's motion
shows it to be a runaway member of the Orion OB1 association,
particularly the subgroup that involves the stars up and to the right
of the Belt.

On Fri, 26 Apr 2013 22:19:51 -0500, Sam Wormley
wrote:

On 4/26/13 8:46 PM, wrote:
On Fri, 26 Apr 2013 20:39:42 -0500, Mark Sieving
wrote:

On Fri, 26 Apr 2013 20:31:11 -0400, Yousuf Khan
wrote:

On a side note, one of my goals in life is to have a life long enough to
see Betelgeuse explode as a supernova. It must be spectacular to be able
to see an astronomical object besides the Sun during the daylight hours!
Betelgeuse may be the only star close enough to become bright enough to
see in the daylight. I don't know if anything like this was ever seen on
Earth before, but if it was, then it must've been the dinosaurs or the
amoebas who saw it back then. If it was the dinos, then they must've
been simply puzzled by the good nocturnal hunting conditions that were
suddenly available. If it was the amoebas & algaes, then they must've
just been surprised by how easy it was to photosynthesize at night.

The 1054 supernova that produced the Crab Nebula was visible during
the day for about three weeks. Betelgeuse is about one tenth the
distance of the Crab Nebula, so if it's a similar supernova it would
be 100 times brighter.


If Betelgeuse goes supernova there is a pretty good chance you can say
bye bye to life on earth


No--Too far away. But it will be bright in the sky.

so you think that we are too far away for a GRB to have any effect on
us? you may want to check your information about gamma ray burst

On 4/26/13 10:44 PM, wrote:
On Fri, 26 Apr 2013 22:19:51 -0500, Sam Wormley
wrote:

On 4/26/13 8:46 PM, wrote:
On Fri, 26 Apr 2013 20:39:42 -0500, Mark Sieving
wrote:

On Fri, 26 Apr 2013 20:31:11 -0400, Yousuf Khan
wrote:

On a side note, one of my goals in life is to have a life long enough to
see Betelgeuse explode as a supernova. It must be spectacular to be able
to see an astronomical object besides the Sun during the daylight hours!
Betelgeuse may be the only star close enough to become bright enough to
see in the daylight. I don't know if anything like this was ever seen on
Earth before, but if it was, then it must've been the dinosaurs or the
amoebas who saw it back then. If it was the dinos, then they must've
been simply puzzled by the good nocturnal hunting conditions that were
suddenly available. If it was the amoebas & algaes, then they must've
just been surprised by how easy it was to photosynthesize at night.

The 1054 supernova that produced the Crab Nebula was visible during
the day for about three weeks. Betelgeuse is about one tenth the
distance of the Crab Nebula, so if it's a similar supernova it would
be 100 times brighter.


If Betelgeuse goes supernova there is a pretty good chance you can say
bye bye to life on earth


No--Too far away. But it will be bright in the sky.

so you think that we are too far away for a GRB to have any effect on
us? you may want to check your information about gamma ray burst


The spin axis for Betelgeuse is in the wrong direction to bath earth
in gamma radiation. Furthermore Betelgeuse mass is too low.

Yousuf Khan posted Sat, 27 Apr 2013 13:34:29 -0400



On 26/04/2013 9:46 PM, wrote:
If Betelgeuse goes supernova there is a pretty good chance you can say
bye bye to life on earth

Only if the GRB it produces is pointed towards us. That means that its
polar jets need to be pointed towards us within 2 degrees. The most
recent study done shows that its polar jets are pointed away from us by
about 20 degrees, so we're safe.

What about expected radiation spectrum ?

Even sourcee weaker then Sun
can have unpleasant high energy spectrum part.


--
Poutnik

On 26/04/2013 9:46 PM, wrote:
If Betelgeuse goes supernova there is a pretty good chance you can say
bye bye to life on earth

Only if the GRB it produces is pointed towards us. That means that its
polar jets need to be pointed towards us within 2 degrees. The most
recent study done shows that its polar jets are pointed away from us by
about 20 degrees, so we're safe.

Yousuf Khan