In response to:

Top Scientists Confirm: Humans Suck

jbecker204 Wrote: Oct 05, 2013 2:19 PM
Yes, but this time it's preventable.
jbecker204 Wrote: Oct 05, 2013 9:46 PM
"global cooling" was a minority view at the time.
MudontheTires Wrote: Oct 05, 2013 4:27 PM
"Yes, but this time it's preventable."

Says who? Algore?

You're as stupid as he is.
usmcpgw Wrote: Oct 05, 2013 2:31 PM
Long duration bursts have exclusively been detected from very distant galaxies. Specifically, these bursts reside in heavy star formation regions, perhaps brought on by galaxy mergers. Short duration bursts occur, generally, a bit closer to home but are much more rare.

In general we detect about one burst a day. However, we only detect those bursts which have their radiation beamed in the general direction of Earth, so we are likely only seeing a percentage of the total spread throughout the Universe.

Understanding the distribution of gamma-ray bursts is difficult, since they heavily rely on the density of star forming regions, as well as the age of the galaxy involved (and perhaps other factors as well). But while most seem to occur in distant galaxies, they could happen in nearby galaxies, or even in our own, but would be much more rare.


gamma-ray burst, beamed directly at Earth, happened today? Well, first of all, in that unlikely event, the damage would still depend on how close the burst is. For argument sake, lets assume that it occurred in the Milky Way galaxy, but very far away from our Solar System.

With the gamma-rays beamed directly at us, the radiation would deplete a significant portion of our atmosphere, specifically the ozone layer. Additionally, the photons would cause chemical reactions leading to photochemical smog. This would further deplete our protection from cosmic rays.

And then there is the lethal doses of radiation that surface life would be exposed too. The end result would be mass extinctions.
Elizabeth420 Wrote: Oct 05, 2013 2:31 PM
jbecker: Where is the DEFINITIVE proof of anything they have predicted
thus far? They've been wrong in every single hyperbolic & hysterical cry
of doom & gloom, from Rachel Carson's "Silent Spring" to Ehrlich's woeful
tale of human extinction--whom it should be pointed out, was only an ety-
mologist, with an advanced degree in studying caterpillars & was in no way
a recognized authority on any of the issues he wrote &/or spoke of w/such
passion & pathos. In the 70's they initially predicted an "Ice Age", with global
cooling which then "morphed" into global warming & now "climate change".
usmcpgw Wrote: Oct 05, 2013 2:29 PM
NO!

you claiming man can CONTROL nature? that man can CONTROL the COSMOS?

lesson.

Stars, supernovae and other heavenly bodies radiate away their energy in various forms: gamma-rays, radio waves and neutrinos to name a few. A lot of it depends on the type of object or event and, related to that, the time scale over which the object is radiating.

While objects like our Sun emit light and particles of virtually every type, some events focus their energy onto a specific wavelength of particle. Gamma-ray Bursts (GRBs), some of the most powerful events in the Universe, focus their energy in the gamma-rays (hence the name). Though, some have been shown to have strong emission in the optical band as well.

Our Sun radiates energy in every direction (this is called isotropic radiating), however some objects have very focused, beamed emission.

Usually this is due to how the object is formed, specifically how its magnetic field twists material into beams. This is common in supernova events as well as around supermassive black holes, where accreted material is heated up and spun collimated in energetic jets, which characterize objects like quasars.

Similarly, when two highly magnetized objects, like black holes or neutron stars collide, their magnetic fields couple to form similar jets that collimate the ejected particles and photons and send them streaming across the Universe.

So whether the energy of a Gamma-ray Burst is created due to the collapsing of a supermassive star (the mechanism usually associated with long duration bursts), or the collision of two black holes or neutron stars (associated with short duration bursts), the radiation is likely to be collimated. (However, it is thought that short duration bursts may be less collimated or, in some cases, not collimated at all.)

Collimating the energy of the blast will focus the energy of the event, which can be immense. A long duration GRB (one last more than two seconds)can produce (and focus) roughly 0.05% Solar mass equivalent energy. That is, the same amount of energy created if 0.05% of the Sun were instantaneously turned completely into energy.

Understanding that kind of energy can be difficult. But if that amount of energy were created and beamed directly at us it would be visible to the naked eye on Earth, from more than 7.5 billion light-years away. That is more than halfway across the entire Universe.