Cosmos Definition and 88 Threads

The basic number you hear all the time is that the Hubble expansion rate is 71 km/s per megaparsec So get the google calculator to tell you want actual percentage growth rate that turns out to be. Say over a billion year span of time. Past this blue thing verbatim into the google window...

I've been having a debate with a friend(he has a cognitive science degree and I'm from the philosophy department), and I've hit a roadblock with him in our rudimentary discussions on quantum physics on how normal processes can go on without observers present. I believe the basic question is, how...

I looked through several threads on questions concerning whehter the universe(s?) was infinite or finite. Most of the answers seemed to be focused on our universe. Even though the many models of multiverses are contraversial and still lack significant objective support in the evidence, some sort...

first i have to apologize if my question sounds dumb. but i graduated only recently from high school. so my current knowledge is at best as good as other high school students. here is my question: let's say that i am boarding a spaceship in the northpole. and then the ship takes off. am i...

Hi, First of all I must say, I am a bit ashamed asking this question... Since its been a long time since I studied mechanics of materials and since I never used it in my line of work, I am trying to analyze a problem regarding this subject using COSMOS in solidworks, I have a model and I...

Anyone else getting tired of hearing about books like Road to Reality and Fabric of the Cosmos and everyone and their sister in high school wanting to do string theory? I really wish someone would write one of these books on like emergent phenomena in physics (like many-body stuff). That way...

Hello: It has been said that something on the order of 75% of the known universe is comprised of dark energy. But, unless one is assigning a negative value to the putative mass that would be associated with that dark energy, then I don't quite see how one can come up with the 75% figure --...

Is there any evidence that electromagnetism has played a role in the formation of galaxies, galactic clusters, and super cluster filaments?

Hi there...just got through chapter 6 and I'm having some issues fully grasping the concepts... I hope I can fully convey my question coherently. Please bear with me, I'm not a physicist! This might sound pretty dumb to you who are more experienced... ;) Greene is saying that the "now"...

I was watching a video about the structure of the universe and they had some neat graphics showing a map of the universe and it's relation to this dark matter. Since most of the Cosmos is really far away causing our view of it to be old also, do they take this into account and correct for this...

An Iridium satellite and a dead Russian satellite collided on Feb 10 at 16:56:00 UST. Debris From Satellites' Collision Said to Pose Small Risk to Space Station They hit each other at an angle of 102.46 degrees, giving them a closing speed of about 11.65 km/sec (about 26,000 mph). That's...

I would just like a couple of opinions on a subject I read in Brian Greene's Fabric of the Cosmos. He states that all of time exists. Every event that has happened or will ever happen exists in its own time line. For instance while I write this at the age of forty two the event when I take my...

Hi. I read a book about 2 years ago called The Holographic Universe, written by Michael Talbot. It described David Bohm's theory that the universe is like a Hologram. He describes all matter, and everything really, in an implicate order that we cannot perceive. The implicate order is like an...

Hi all, I am new to the forum and am despreate for the solution for my current task. I am given a canteliver beam with the dimention: L =1250mm W= 75mm D= 30mm E=200 Gpa density = 7800kg/m^3 poison ratio=0.3 and I optained the first five natural frequencies from COSMOSWorks 2007...

question about greene's "the fabric of the cosmos" I have a question regarding the content of chapters 5 and 6 in Brian Greene's "The Fabric of the Cosmos." Although my question results from what I see as an inconsistency in what he has presented, I'm not claiming that my logic is flawless...

Carl Sagan's Cosmos is going to be shown for the last time on the Science Channel on the 22nd in an all day marathon, starting at 10 in the morning.

http://science.discovery.com/convergence/cosmos/cosmos.html Carl Sagan's Cosmos will be airing in its entirety beginning January 8th on the Discovery Science Channel in the US! Website above has clips and some fun interactive stuff. I should really get the DVD box.

Hello Everyone, I'm a new member to this interesting forum, just joined. I was watching a program on the Discovery channel about the Universe. They were talking about the size and said it was "157 billion light years across. I watched the program 2 times to make sure I got it right...

I’d be grateful if someone could shed some light on how we know the expansion of the universe is accelerating by the luminosity of supernova types 1a? I'm currently reading 'The Extravagant Universe' by Robert Kirshner and he talks extensively about searching for supernova. While this is done in...

There will be an inaugural conference to celebrate the opening of the new Institute for Gravitation and the Cosmos, on 9 - 11 August at Penn State http://www.gravity.psu.edu/igc/ http://www.gravity.psu.edu/igc/conf_files/prelim_agenda.html Here's a sample from the program. I'll skip most of...

Announcement of the inaugeral conference of the IGC in August. http://www.gravity.psu.edu/igc/ description of what the new institute is to be like and what the purpose is http://www.gravity.psu.edu/igc/igc-web.pdf ==quote== Abhay Ashtekar, holder of the Eberly Chair in Physics and the...

Hi I am reading 'The Fabric Of the Cosmos' by Brian Greene. I am not able to understand a particular part of it.I have a doubt as below. In one of the chapters he says that suppose there are two observers. One on the Earth and the other one on a planet (lets call it planetA ) which is 10...

What do you believe to be the most shared philosophy of intelligent civilizations throughout the universe?

I have only one question at the moment which I am pondering over. Now I am aware the the Laws of Physics govern most happening in the Cosmos, but what made these laws? I mean how did the speed of light end up at 3*10^8, How did gravity come about, what started time and when/how and what did the...

In case anyone is interested, here is a new paper just out. Any comment? http://arxiv.org/abs/astro-ph/0603637 The Mass of the Cosmos Charles Hellaby 6 pages, 9 graphs in 3 figures "We point out that the mass of the cosmos on gigaparsec scales can be measured, owing to the unique...

episode of Carl Sagan's "Cosmos" series An episode of Carl Sagan's "Cosmos" series "One Voice In the Cosmic Fugue" will be on tonight at 9pm CST on the Discovery Channel. I see other episodes are on the Science Channel. I haven't seen this in years, I bought the entire collection on VHS...

1)According to Paul Davies, most physicists who work on fundamental physics believe the laws of physics have some independent existence to the universe 2)The laws of physics are propositions if they exist independently to the universe 3)Propositions are semantic-based structures 4)We are...

http://www.logosjournal.com/issue_4.3/smolin.htm

Is it used to explain gravity as an effect caused by parallel moving like charges? Is it simply a theory that puts an electric field everywhere present in space? is it a valid theory or is it more of a hypothesis?

Books like "The Fabric of the Cosmos" and "Parallell Worlds" and "The Elegant Universe" Are there any new books out similair to these? I have finished all three of them, and have the taste for more. Please recommend some books, thanks!

This has been bugging me for some time and I'd love to get a clearer picture. We know that photos from the various moon missions show a black sky without stars, and that has been explained to me before as resulting from the fact that those photos were taken in broad daylight, plus maybe the...

"Astronomers have recaptured the sounds of the early Universe showing it was born not with a bang but a quiet whisper that became a dull roar. Mark Whittle of the University of Virginia has analysed the so-called background radiation that was born 400,000 years after the Big Bang. Ripples in...

Is Cosmos Homogeneous, Isotropic ? Is the universe really homogeneous and isotropic? The answer is hidden within the structure of spacetime.

I'm sure this question is elementary for most of you, but I want to make sure I'm on the same page as everyone else. 1. The cosmos is everything that exist. 2. The universe is a subset of the cosmos and contains all of the galaxies and other stuff that has mass, including areas that have not...

I have a copy of Brian Greene's Fabric of the Cosmos in my hand, just starting to read it.

"Cosmos" - A Critique “Cosmos”, by Carl Sagan A Critique by MirabileAuditu Note: Carl Sagan was a scientist and teacher at Cornell University. Unfortunately, he demonstrated an extremely left-wing bias, while contradicting himself and saying things that were either untrue or patently...

All, Is anyone aware of any theories or studies examining the relationship between the behaviour of the cosmos and that of human beings? For example: The gravitational pull of large (or small) bodies in nature causes them to be attracted to or repelled from each other, human beings are...

http://www.cnn.com/2003/TECH/space/06/20/dark.energy.ap/index.html