Atoms in the Universe A billion years after the big bang, hydrogen atoms were mysteriously torn apart into a soup of ions. Credit: NASA/ESA/A. Felid (STScI)). It’s no secret that the universe is an extremely vast place. That which we can observe (aka. But interestingly enough, it is when you look at that matter on the smallest of scales that the numbers become the most mind-boggling. At this level, it is estimated that the there are between 1078 to 1082 atoms in the known, observable universe. And yet, those numbers don’t accurately reflect how much matter the universe may truly house. The history of the universe starting the with the Big Bang. While a German supercomputer recently ran a simulation and estimated that around 500 billion galaxies exist within range of observation, a more conservative estimate places the number at around 300 billion. On average, each star can weigh about 1035 grams. However, Einstein’s equivalence of mass and energy presents a slight complication to this theory.
Einstein's Big Idea | Time Traveler One of Albert Einstein's greatest insights was realizing that time is relative. It speeds up or slows down depending on how fast one thing is moving relative to something else. How much does it change? Requires the Shockwave plugin Instructions Click on Captain Ein or Major Stein to set their starting ages.Click on the spaceship to set its speed.Click one of the twinkling stars to choose a destination and start the journey.When the spaceship lands, compare Captain Ein's and Major Stein's ages. Suggested experiments What happens if: you change the speed of the spaceship? Also, can you find ways to set the ages, speed, and destination so that Captain Ein and Major Stein are almost the same age when Captain Ein returns from her journey? Why does time change? Ever feel like time moves very quickly and sometimes very slowly? Albert Einstein didn't think so. Imagine you're standing on Earth holding a clock. The twin paradox The trip to the star and back takes 50 years. Not at all. Why?
How Albert Einstein's Brain Worked" In his last years of life, Albert Einstein knew he was ill and refused operations that would save his life. He made his wishes clear: "I want to be cremated so people won't come to worship at my bones" [source: Paterniti]. Einstein died on April 18, 1955, at the age of 76 of a ruptured abdominal aortic aneurism, and he got his wish as far as his bones were concerned; his ashes were scattered in an undisclosed location. But Einstein's brain was a different matter. During the autopsy, conducted at Princeton Hospital, a pathologist named Thomas Harvey removed Einstein's brain -- the brain that had given the world such revolutionary thoughts as E=mc², the theory of relativity, an understanding of the speed of light and the idea that led to the completion of the atomic bomb. Harvey held the brain that produced those thoughts in his hands. Depending on whom you believe, Harvey either did a wonderful thing for science that day, or he's no better than a common grave robber.
Welcome | Virgin Galactic Hydrogen Atom Scale Model [UPDATE: Well, now that I took the page down I've been hearing from teachers who found it useful even if it is a little inaccurate. So, when I get a little time I'm going to put something back here that will hopefully please everyone. Stay tuned.] So I used to have a page here that was a demonstration of how much empty space there is inside a hydrogen atom. The page had a picture of a proton that was one thousand pixels wide, and a little electron that was only one pixel wide, and they were separated by fifty million pixels of empty space - I worked it out that that was eleven miles if your monitor displayed 72 pixels per inch, not uncommon at the time. Keeping it working with various web browsers was a bit of a challenge. The other thing about the page is that it wasn't, strictly speaking, correct, as people who know Real Physics would periodically write and tell me. So, I've taken the page down, at least for now. We are all phantoms.
Sky above 32°29'28"N 0°W at Fri 2011 Sep 9 4:36 Explain symbols in the map. Click in map to aim telescope.View horizon at this observing site. Ephemeris: Azimuth in the above table follows the astronomical convention: zero degrees is South with positive angles toward the West and negative angles toward the East. Back to Sky Maps Up to Your Sky Credits Customise Help Images produced by Your Sky are in the public domain and may be used in any manner without permission, restriction, attribution, or compensation.
Interactive 3D model of Solar System Planets and Night Sky ISS (ZARYA) MUSK WANTS TO MAKE FALCON ROCKETS FULLY REUSABLE - SpaceX chief Elon Musk said last week he is “fairly confident” his company’s Falcon rockets can be made fully reusable within a couple of years, suggesting a renewed emphasis on outfitting upper stages for a scorching re-entry after engineers shelved the idea to focus on landing the launcher’s bigger booster stage. The launch firm revealed a concept to recover and reuse both stages of the Falcon 9 rocket in 2011, but visible technical progress has been limited to the first stage in the last few years. Landing and relaunching the Falcon 9’s first stage presented a lesser challenge to SpaceX’s engineers, and the booster is the most valuable part of the rocket, representing about 70 percent of its total cost. More (Source: SpaceFlight Now - Apr 12) THIS STARTUP WANTS TO BUILD A NANO SATELLITE FLEET FOR THE INTERNET OF THINGS - We're hurtling towards a future where everything from cows to toasters will be internet-connected.