UM-Bot Posted November 25, 2014 #1 Share Posted November 25, 2014 Two astrophysicists have proposed that gamma ray bursts could halt the development of complex life forms. The universe contains an estimated 100 billion galaxies, a seemingly endless supply of opportunities for life to develop, yet according to astrophysicists Tsvi Piran and Raul Jimenez only one in ten of these may be able to accommodate complex life forms like those we see here on Earth. Read More: http://www.unexplained-mysteries.com/news/275097/90-of-galaxies-may-be-hostile-to-life 1 Link to comment Share on other sites More sharing options...
DONTEATUS Posted November 25, 2014 #2 Share Posted November 25, 2014 Thats still leaves a chance right ? Sheww ! I thought we werer alone ! Link to comment Share on other sites More sharing options...
Merc14 Posted November 25, 2014 #3 Share Posted November 25, 2014 It seems like there are a lot of hurdles to overcome for an advanced life form to survive long term. 1 Link to comment Share on other sites More sharing options...
DONTEATUS Posted November 25, 2014 #4 Share Posted November 25, 2014 Its a daunting job to survive ones self`s advancement For sure ! Look at us ! We may not even make it past the next 100 years ! We either destroy our planet or ourselfs ! Link to comment Share on other sites More sharing options...
Sundew Posted November 25, 2014 #5 Share Posted November 25, 2014 And 100% of other galaxies are so far away, we will never know for sure at our current level of technology. 1 Link to comment Share on other sites More sharing options...
paperdyer Posted November 25, 2014 #6 Share Posted November 25, 2014 More speculation. And yet, the Earth rebounded. This article brings to mind a recent Doctor Who episode. Maybe the trees will save us, if we don't kill them all. Link to comment Share on other sites More sharing options...
Dewrot Posted November 25, 2014 #7 Share Posted November 25, 2014 Lets hope... Link to comment Share on other sites More sharing options...
Troublehalf Posted November 25, 2014 #8 Share Posted November 25, 2014 "Two possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying." Also, 1 in 10. Okay that leaves us with only 10 billion galaxies which could hold life. Oh noes. That must mean no alien life then :'( 3 Link to comment Share on other sites More sharing options...
alfonso Posted November 25, 2014 #9 Share Posted November 25, 2014 an estimated 100 billion galaxies.. wow! just wow! 1 Link to comment Share on other sites More sharing options...
Weitter Duckss Posted November 25, 2014 #10 Share Posted November 25, 2014 I do not understand where they lost their star? Galaxies have a up to 400 billion stars, how it is possible one move to delete the possibility of life in each system? Life depends still on more factors. It would be interesting to consider how things are in galaxies that are moving at a speed of 270,000 km / sec? Link to comment Share on other sites More sharing options...
bison Posted November 25, 2014 #11 Share Posted November 25, 2014 (edited) Nine of ten galaxies may be unsuitable for complex life? Not as discouraging as it may sound. Nine out of every ten planets, at least, in our own galaxy are probably similarly unsuitable. We know that our galaxy is fit for complex life, at least in part, or we wouldn't be here. We've barely begun to search for life in our own Milky Way. It is suggested that even our own galaxy was unsuitable for complex life for its first five billion years, also due to gamma ray bursts. So be it ! That still leaves the last 8 & 1/2 billion years for advanced forms of life to develop in our galaxy. Life of any sort on our planet appears to be around 3.7 billion years old. This means that we could be sharing a galaxy with beings about five billion years more advanced than ourselves. And that seems quite enough to be going on with ! Edited November 25, 2014 by bison 1 Link to comment Share on other sites More sharing options...
Occult1 Posted November 25, 2014 #12 Share Posted November 25, 2014 (edited) Nine of ten galaxies may be unsuitable for complex life? Not as discouraging as it may sound. Nine out of every ten planets, at least, in our own galaxy are probably similarly unsuitable. We know that our galaxy is fit for complex life, at least in part, or we wouldn't be here. We've barely begun to search for life in our own Milky Way. I totally agree. Assuming that these researchers are right in their estimates, 10% is still pretty high considering that there can be hundreds of billions of galaxies out there.. That still makes for a 1 and quite lot of 0.. But that's assuming complex life forms can only evolve in conditions similar to Earth.. That may be narrow perception of what life can actually be about. Edited November 25, 2014 by sam_comm 1 Link to comment Share on other sites More sharing options...
Atuke Posted November 25, 2014 #13 Share Posted November 25, 2014 I'm telling you, rare Earth is real. Cherish what we have. 1 Link to comment Share on other sites More sharing options...
Starhunter Posted November 26, 2014 #14 Share Posted November 26, 2014 All galaxies are not only suitable for life but have life in abundance. Link to comment Share on other sites More sharing options...
Merc14 Posted November 26, 2014 #15 Share Posted November 26, 2014 I think I'll concentrate on our little spiral with 300 billion stars that we KNOW can give birth to intelligent life and hope for the best. Link to comment Share on other sites More sharing options...
Aus Der Box Skeptisch Posted November 26, 2014 #16 Share Posted November 26, 2014 Come on extremophiles! 1 Link to comment Share on other sites More sharing options...
aniknonymous Posted November 26, 2014 #17 Share Posted November 26, 2014 i certainly hope there are aliens out there. it would be just unbelievable that earth could be the only planet that complex lifeforms exist. Link to comment Share on other sites More sharing options...
Atuke Posted November 26, 2014 #18 Share Posted November 26, 2014 Nope! This is it. Planet Earth and its Earthlings big and small. We are all special and most likely THE ONLY LIFE IN THE UNIVERSE! The circumstances to how and why we are even here are so insanely hard to comprehend that it's almost easier to dismiss it as a divine creator made all of this. If things wern't to EXACT SPECS no life would exist here, and it means it's nearly impossible to replicate it elsewhere in the universe, even with infintile numbers. Life didn't even exist before THE MOON took residence as our friendly neighbor, causing just the right amount of gravitational pull to help create seasons and temperature change....giving rise to the chemistry of LIFE! This is just one of thousands of reasons why and how we are here and it's almost improbable to replicate. RARE EARTH IS REAL Link to comment Share on other sites More sharing options...
Merc14 Posted November 26, 2014 #19 Share Posted November 26, 2014 (edited) Nope! This is it. Planet Earth and its Earthlings big and small. We are all special and most likely THE ONLY LIFE IN THE UNIVERSE! The circumstances to how and why we are even here are so insanely hard to comprehend that it's almost easier to dismiss it as a divine creator made all of this. If things wern't to EXACT SPECS no life would exist here, and it means it's nearly impossible to replicate it elsewhere in the universe, even with infintile numbers. Life didn't even exist before THE MOON took residence as our friendly neighbor, causing just the right amount of gravitational pull to help create seasons and temperature change....giving rise to the chemistry of LIFE! This is just one of thousands of reasons why and how we are here and it's almost improbable to replicate. RARE EARTH IS REAL You need to approach this subject from a more objective perspective. No one here wants us to be the only intelligent life and I would guess most of us hope there is another civilization out there but none of us think "they" are visiting and building pyramids. I know of only one skeptic here that denies any chance of life off planet so the generalization is way off base. Edited November 26, 2014 by Merc14 Link to comment Share on other sites More sharing options...
Weitter Duckss Posted November 26, 2014 #20 Share Posted November 26, 2014 Radioactive radiation have very short ranges (in terms the size of the galaxy). The rays from the sun barely visible on Pluto. Look at the stars and you will see the range and power of radiation. And a very large emission of gamma radiation can not harm beyond the first narrow strip from the center of the galaxy. Although not stated, it is probably a vertical emission of gamma rays, not horizontal, where the star systems are located. Reasons for exclude the presence of life are not correct. Link to comment Share on other sites More sharing options...
Waspie_Dwarf Posted November 26, 2014 #21 Share Posted November 26, 2014 All galaxies are not only suitable for life but have life in abundance. And you are going to back that up with evidence? Link to comment Share on other sites More sharing options...
Waspie_Dwarf Posted November 26, 2014 #22 Share Posted November 26, 2014 (edited) Radioactive radiation have very short ranges (in terms the size of the galaxy). The rays from the sun barely visible on Pluto. Look at the stars and you will see the range and power of radiation. And a very large emission of gamma radiation can not harm beyond the first narrow strip from the center of the galaxy. Although not stated, it is probably a vertical emission of gamma rays, not horizontal, where the star systems are located. Reasons for exclude the presence of life are not correct. More word soup. More nonsense. More pretending to know what you are talking about when you really, REALLY don't. Radioactive radiation have very short ranges (in terms the size of the galaxy). Electromagnetic radiation diminishes with distance accurring to an inverse square law. If you double the distance you receive a quarter of the radiation. Triple the distance and you receive a third of the radiation, and so on. What this means is that although the intensity diminishes rapidly the range is theoretically infinite. Light and other electromagnetic radiationThe intensity (or illuminance or irradiance) of light or other linear waves radiating from a point source (energy per unit of area perpendicular to the source) is inversely proportional to the square of the distance from the source; so an object (of the same size) twice as far away, receives only one-quarter the energy (in the same time period). More generally, the irradiance, i.e., the intensity (or power per unit area in the direction of propagation), of a spherical wavefront varies inversely with the square of the distance from the source (assuming there are no losses caused by absorption or scattering). Source: Wikipedia How distant from the object the radiation will remain lethal depends entirely on the intensity of the radiation at source. Let's examine the following claim of yours shall we? The rays from the sun barely visible on Pluto. Have you ever actually gone out on a dark night and looked at the sky? Try it some time. You will see these things called stars. They are objects like our sun. They are many millions of times further away than Pluto is from the Sun and yet they are clearly visible. Instead of pretending to know what we are talking about (and demonstrating we don't) let's do a little maths. From the Earth the Sun is around 400,000 times brighter than the Moon Example: Sun and MoonWhat is the ratio in brightness between the Sun and the full moon? The apparent magnitude of the Sun is -26.74 (brighter), and the mean apparent magnitude of the full moon is -12.74 (dimmer). Difference in magnitude : x = m_1 - m_2 = (-12.74) - (-26.74) = 14.00 Variation in Brightness : v_b = 2.512^x = 2.512^{14.00} = approx 400,000 The Sun appears about 400,000 times brighter than the full moon. Source: Wikipedia Pluto is on average 40 times further from the Sun than Earth is. Let's apply the inverse square law I mentioned earlier to find out how much dimmer the Sun appears on Pluto: 1/402 = 1/1600 So the Sun is only 1/1600 as bright on Pluto. Lets compare that to the brightness of the full Moon as we see it on Earth: 400,000/1,600 = 250 The Sun from Pluto is approximately 250 times brighter than the full Moon from Earth. If you think that an object 250 brighter than the full Moon is, "barely visible" then you need to get to an eye specialist immediately. Edited November 26, 2014 by Waspie_Dwarf 2 Link to comment Share on other sites More sharing options...
Starhunter Posted November 26, 2014 #23 Share Posted November 26, 2014 And you are going to back that up with evidence? No. Common science has no evidence. Sorry. Link to comment Share on other sites More sharing options...
Waspie_Dwarf Posted November 26, 2014 #24 Share Posted November 26, 2014 No. Common science has no evidence. Sorry. The problem is that this IS the science section. Science requires evidence. Claiming something as fact when it has no supporting evidence is a scientifically dishonest thing to do. Link to comment Share on other sites More sharing options...
Starhunter Posted November 26, 2014 #25 Share Posted November 26, 2014 The problem is that this IS the science section. Science requires evidence. Claiming something as fact when it has no supporting evidence is a scientifically dishonest thing to do. I have evidence but not supported by your world of science, so I won't post in the wrong section again. Link to comment Share on other sites More sharing options...
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