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. Latitude and Longitude of a Point. 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. It was based on something called the "Bohr model" of the atom, where you imagine the atom as a nucleus with electrons orbiting around it - kind of like a tiny solar system.
The Bohr model has been obsolete for ages, but they still teach it in schools because it's a simple introduction to quantum physics and you can move on to more accurate models later. Keeping it working with various web browsers was a bit of a challenge. People who make web browsers don't often start with the assumption that their browser should be able to display a web page eleven miles wide, as this is an uncommon size. We are all phantoms. Gravity - From Newton to Einstein - The Elegant Universe. Gravity in terms of space-time. 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? In this feature originally designed for students in 1996, "Captain Ein" and "Major Stein" have volunteered to help you find out. Send Captain Ein on a round-trip journey to a star and then compare her age with Major Stein's on Earth. —Jenny Lisle 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? The twin paradox. 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. Proof of the existence of God set down on paper. 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. Earth View. Space, NASA Information & News | Outer Space Flight Videos & Pictures | Astronomy, Solar System Images. Welcome | Virgin Galactic. Infographic shows how high Virgin Galactic’s SpaceShipTwo will actually go. My Solar System 2.03. 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. Interactive 3D model of Solar System Planets and Night Sky. Simple Satellite Tracking from Spaceweather.com.