TheExplorer

Sir Edmund Halley believed that the Earth was hollow. While the Earth being hollow would explain many stories in ancient cultures, would it change physics? Is it scientifically impossible?

I am interested in cosmology/astronomy, but only as a hobby. I constantly find some very helpful sites to further my knoledge in the subject and am going to post them here for anyone to view, so there in one place. Hope its useful. If anyone wants to post any useful links too, please do. This is the best website ever. They have textbooks and academic reads in every subject. http://www.freebookcentre.net/ Mainly for kids, but has astronomy games and info. www.kidsastronomy.com Free online astronomy courses on Coursera. https://www.coursera.org/courses?search=astronomy ASTRONOMY TODAY www.universetoday.com I have found three different simulations of the cosmos that are awesome: 1.) Google Sky. http://www.google.ca/sky/ 2.) World Wide Telescope (WWT) http://www.worldwidetelescope.org/ 3.) NASA'S Skyview virtual Observatory

It used to be thought that once something went into a black whole, it was lost forever, but then Steven Hawking said that information could leak out. Then he renounced his theory because it did not agree with quantum mechanics, however apparently there is a new theory. Here is an excerpt from space.com about it, The newly proposed scheme, in a nutshell, says space-time is bigger than was thought, and so there's room for the information to reappear. "Information only appears to be lost because we have been looking at a restricted part of the true quantum-mechanical space-time," said Penn State's Abhay Ashtekar, who has come up with the idea. "Once you consider quantum gravity, then space-time becomes much larger and there is room for information to reappear in the distant future on the other side of what was first thought to be the end of space-time." Does this mean, if I jumped into a black whole, I wouldn't be gone forever? and also what about the big crunch? if the whole universe collapses into a black whole? would it come back? More about the new theory here: http://www.space.com/5346-idea-solve-black-hole-information-mystery.html

I know that the Big Bang theory came to be after Edwin Hubble discovered the expanding universe. Since the universe was expanding, it had to originate from one point back in time. What caused the universe to expand? was it the energy from the dense universe? or perhaps the compacted universe was but a star in a sea of universe, and there was a force that acted like anti gravity, pulling the atoms away from each other. Was it that the individual atoms expanded away from each other? I read on a physics forum someone say, that the universe is not really 14 billion years old, it is 14 billion years from the oldest time our theories can make an accurate prediction. Are their different interpretations of the math in the big bang theory? What do we really know about the big bang theory? How is it that the universe was super dense and super small? how did all the atoms fit into such a small space if there was the same amount of atoms then, then there is now. Also, if Higgs bosons give mass to matter, can some other particle take it away? Is there a Devil particle? Thanks, Read more: < advertising link removed> This means that when we say 'the Universe is 14 Billion years old' what we really mean is that it is 14 Billions years from the oldest time our theories can make an accurate prediction. At some point as we wind the clock back and the Universe becomes more and more dense and hot we reach a point where we don't know how stuff behaves at those densities and temperatures. Our theories stop working, and we describe this as a 'singularity' but that is a description of an equation, not a physical 'thing'.

Hello, my name is TheExplorer, and well, I like to explore new concepts and ideas. If you ever want to have a nice scientific conversation with me, feel free to message me. My two favorite areas of science are astronomy and the medical sciences, but more astronomy. Sometimes, I cant sleep at night because I can't stop but think about things I can't comprehend. Like what time is, or what gravity is, or how is it that life exists at all. Today is my first day on this forum, but to be honest, it feels quite homy here. I love science, but hardly anyone I know does, so its awesome to see all my fellow nerds here. Thanks, Sincerely, TheExplorer.

You are completely right about that article. I didn't mean to put that one. I read it, disregarded it, but when I was doing my sources I accidently included it. That was stupid of me. However it is quite concerning, that that article is displaying a different definition of a zombie star, and perhaps more troubling is how how unscientific and unspecific the title "zombie star" is when referring to the possible fate of white dwarfs companion star in a binary system. I thought the term "zombie star" was merely an alternative name for the phenomenon, a result of popular media, but after looking around the internet, I can find no trace of a real scientific name. http://www.iflscienc...ind-zombie-star You should read this article from my list. Near the bottom, there is a recounting of zombie stars found in supernova SN2012Z in the galaxy NGC1309, which is what you mentioned above. The definition I provided was partly from that account, and partly from a few other sources. Now there are many names of specific companion stars, and although a zombie star is indeed the companion star of a white dwarf it should not be called that. I am actually quite surprised by the lack of information regarding these so called zombie stars, but I am sure with more time, some more concrete and less confusing facts will surface on the internet. I have only found news articles, blog posts, and news related findings on the topic, and no wikipedia, fact-styled pages and concrete findings. But I will include anymore info I find about the topic here.

I never understood how the forces of nature came to be. Like what is gravity really? I know no one knows this for sure, but I have read that it is possible that matter is given to objects by higgs boson particles and that gravity could actually be a particle called a gravitron? How exactly does the whole forces might be particle theory work?

How do memories work? how are we able to imagine, think, learn. What is the substance of thought?

To answer your question, I present the beautiful story of the creation of a zombie star: To us humans, youth and life are the most beautiful, joyous things and old age and death, well.. not so much. However, as we observe the stars from our small earth, it makes no difference whether they are newly born stars in a stellar nebula or old white dwarfs. They are ALL beautiful. A white dwarf star is essentially a dead star, and what 99% of all stars will become when nuclear fusion stops producing the fuel in a star. The only way zombie stars form is if a white dwarf star is orbiting another star in a binary system, and either the white dwarf star steals away all the mass from the other star so that its core reaches the temperature required for carbon fusion, or it merges with its companion star, increasing its temperature beyond fusion point, so that a powerful runaway reaction occurs, producing either a normal type Ia supernovae (which doesn't result in zombie stars) or the more rare type Iax supernovae in a fantastic explosion as bright as 1 billion suns, killing the white dwarf star, and leaving its companion star as a helium core, otherwise known as a zombie star. Whoever said death was inevitable, ain't never heard of a zombie star. I hope this helps you understand. If you want to read more about zombie stars, here are my sources: http://www.palmbeachpost.com/news/technology/astronomers-may-have-discovered-zombie-star/ngzFs/ http://www.nature.com/nature/journal/v512/n7512/full/nature13615.html http://www.universetoday.com/90854/new-nasa-mission-hunts-down-zombie-stars/ http://en.wikipedia.org/wiki/Type_Ia_supernova http://www.cnet.com/news/nasa-discovers-zombie-star-haunting-the-universe/ http://www.iflscience.com/space/weak-supernova-leaves-behind-zombie-star