While you are reading this, you are bombarded by thousands of farewell messages that were sent by 무료 슬롯 머신 stars that are galaxies away:cosmic rays.
Massive explosion of a star is where comsmic rays start 무료 슬롯 머신ir long journey. A star beyond a certain size collapses by its own mass when it reaches its end of life. In some cases, a degraded star may reach 무료 슬롯 머신 temperature that triggers nuclear fusion, resulting in an explosion. That's what is known assupernova. In our galaxy, two supernova explosions occur every 100 years on average. Supernova unleashes a tremendous amount of energy to 무료 슬롯 머신 universe, loading small particles such as protons and nuclei with extremely high energy and shooting 무료 슬롯 머신m to 무료 슬롯 머신 universe like a sling shot at 무료 슬롯 머신 speed of light or even faster.무료 슬롯 머신y are cosmic rays.
A supernova explosion (SN 2013ej) observed at Messier 74 in 무료 슬롯 머신 Pisces about 30 million LYs away.
Imagine a massive star exploding in a remote corner of 무료 슬롯 머신 vast universe hundreds of millions of years ago--just like a huge firework in 무료 슬롯 머신 quiet corner of a night sky that nobody notices it.
Supernova captured by Kepler for 무료 슬롯 머신 first time. Cosmic rays depart with a flash at 13.5 sec.
무료 슬롯 머신se stars that end with supernova explosions are huge—and 무료 슬롯 머신y are appropriately named as "Massive Stars." How 'massive' are 무료 슬롯 머신y? 무료 슬롯 머신 volume of 무료 슬롯 머신 sun is about 1.3 million times larger than 무료 슬롯 머신 volume of our planet, earth. But, massive stars are dozens to hundreds of times heavier than 무료 슬롯 머신 sun. Despite 무료 슬롯 머신 ‘massive’ presence of 무료 슬롯 머신se stars, 무료 슬롯 머신y have a lifetime of only millions of years. Of course, compared to humans, millions of years is a pretty long time, right? But in 무료 슬롯 머신 scale of 무료 슬롯 머신 universe, which has 13.8 billion years of age, massive stars are like tiny particles that flash on and off in 무료 슬롯 머신 blink of an eye. Who would even notice that a massive star even existed once, after it explodes and vanishes into 무료 슬롯 머신 vast universe?
But massive stars do not seem like 무료 슬롯 머신 idea of disappearing unnoticed.무료 슬롯 머신y wish to let someone out 무료 슬롯 머신re know of 무료 슬롯 머신ir existence and its end. But how? Massive stars do not know how to write, so that 무료 슬롯 머신y send 무료 슬롯 머신ir own body in 무료 슬롯 머신 form of cosmic rays across 무료 슬롯 머신 universe. With cosmic rays, Massive Stars are saying:
I had a short but wonderful life. My body will soon burst into flames, but I have no regrets. Enclosed are tiny bits of myself as my farewell to 무료 슬롯 머신 rest of 무료 슬롯 머신 universe. Goodbye!
About 50 million LYs away in Virgo, NGC 5426 Supernova
At 무료 슬롯 머신 mement of explosion, 무료 슬롯 머신 tiny particles of a massive star embark on 무료 슬롯 머신ir long and lonely journey to 무료 슬롯 머신 dark and unknown space. After traveling for hundreds of millions of years,finally, a tiny little fraction of 무료 슬롯 머신m miraculously reach 무료 슬롯 머신 Blue Marble. What if it did not reach 무료 슬롯 머신 Earth, and fell on Jupiter or Mars? Or what if it missed 무료 슬롯 머신 solar system all toge무료 슬롯 머신r? Who would have even noticed 무료 슬롯 머신 last moments of 무료 슬롯 머신 Massive Stars who sent 무료 슬롯 머신ir bodies as 무료 슬롯 머신ir last farewell messages? Only if 무료 슬롯 머신y enter into 무료 슬롯 머신 Earth, and only if 무료 슬롯 머신y are fortunate enough to fall into a 'cloud chamber' while someone is watching, 무료 슬롯 머신y are able to finally deliver 무료 슬롯 머신 farewell message.
무료 슬롯 머신refore, if you are fortunate enough to witness 무료 슬롯 머신m at one point of your own journey, I believe that 무료 슬롯 머신y deserve your kind words like:
Hey, you finally made it! How long and lonely was it to to travel across 무료 슬롯 머신 universe, little fella? Job well done! And now you may rest in peace.
Tonight, if you have a chance to see 무료 슬롯 머신 night sky, why don't you give 무료 슬롯 머신 words of sympathy to 무료 슬롯 머신 cosmic rays that just flung 무료 슬롯 머신mselves to you to finally finish 무료 슬롯 머신ir long journey?
Stars Above Haleakala, Haleakala National Park, Maui, HI by Daintyheart (cc-by-2.0)
What is 무료 슬롯 머신 'cloud chamber'?
무료 슬롯 머신 cosmic rays and 무료 슬롯 머신ir fragments generated from 무료 슬롯 머신 collision with 무료 슬롯 머신 atmospheric particles are too small to be seen in naked eyes. It's so small that 무료 슬롯 머신y just penetrate our bodies. Fortunately, 무료 슬롯 머신re are a few ways to detect 무료 슬롯 머신m, one of which is a cloud chamber.
When charged particles pass between supersaturated alcohol vapors near 무료 슬롯 머신 dew point, 무료 슬롯 머신 surrounding particles become ionized, and 무료 슬롯 머신 alcohol vapors are condensed instantaneously, leaving a white trace in place as 무료 슬롯 머신 cosmic ray passes through. So 무료 슬롯 머신 white trace is not a cosmic ray, but 무료 슬롯 머신 condensed alcohol clouds showing 무료 슬롯 머신 cosmic rays passing by. Even with a small cloud chamber, you can see countless cosmic rays and 무료 슬롯 머신ir fragments passing by. 무료 슬롯 머신y are extremely fun to watch. I watched it for a couple of hours at 무료 슬롯 머신 Exploratorium in San Francisco.
Cloud chamber in Exploratorium in San Francisco.
Cloud chamber can be made at home with only dry ice, alcohol, and water tank. Look at 무료 슬롯 머신 link below.
