LROC Image Browser :: Homepage > Images :: LROC Browse Gallery « Previous 1 2 3 4 5 6 7 8 9 … 70 71 Next » Displaying images 1 - 9 of 632 in total One in a Million Mounds Swept Slopes of Herigonius Small Clearing Lavoisier Pyroclastics Distal Edges Rockin' Autumni Young Crater Walls Faulted Kipuka Stratification in a Tranquil Sea Primordial weirdness: Did the early universe have one dimension? Scientists outline test for theory That's the mind-boggling concept at the heart of a theory that University at Buffalo physicist Dejan Stojkovic and colleagues proposed in 2010. They suggested that the early universe -- which exploded from a single point and was very, very small at first -- was one-dimensional (like a straight line) before expanding to include two dimensions (like a plane) and then three (like the world in which we live today). The theory, if valid, would address important problems in particle physics. Now, in a new paper in Physical Review Letters, Stojkovic and Loyola Marymount University physicist Jonas Mureika describe a test that could prove or disprove the "vanishing dimensions" hypothesis. Because it takes time for light and other waves to travel to Earth, telescopes peering out into space can, essentially, look back into time as they probe the universe's outer reaches. Gravitational waves can't exist in one- or two-dimensional space.
NASA-engineered collision spills new Moon secrets Scientists led by Brown University are offering the first detailed explanation of the crater formed when a NASA rocket slammed into the Moon last fall and information about the composition of the lunar soil at the poles that never has been sampled. The findings are published in a set of papers in Science stemming from the successful NASA mission, called LCROSS for Lunar CRater Observing and Sensing Satellite. Peter Schultz and graduate student Brendan Hermalyn analyzed data from bits of the Moon’s surface kicked up by a NASA-engineered collision. They found unexpected complexity — and traces of silver. Credit: Mike Cohea/Brown University Mission control at NASA Ames sent the emptied upper stage of a rocket crashing into the Cabeus crater near the Moon’s south pole last October. “This place looks like it’s a treasure chest of elements, of compounds that have been released all over the Moon,” Schultz said, “and they’ve been put in this bucket in the permanent shadows.”
Are We Really All Made of Stars? | Cosmos, Moby’s Song ‘We Are All Made of Stars’, Universe & Solar System | Life's Little Mysteries The theory that everyone and everything on Earth contains minuscule star particles dates back further than Moby's popular 2002 song "We Are All Made of Stars." In the early 1980s, astronomer Carl Sagan hosted and narrated a 13-part television series called "Cosmos" that aired on PBS. On the show, Sagan thoroughly explained many science-related topics, including Earth's history, evolution, the origin of life and the solar system. "We are a way for the universe to know itself. His statement sums up the fact that the carbon, nitrogen and oxygen atoms in our bodies, as well as atoms of all other heavy elements, were created in previous generations of stars over 4.5 billion years ago. "All organic matter containing carbon was produced originally in stars," Impey told Life's Little Mysteries. How star stuff got to Earth When it has exhausted its supply of hydrogen, it can die in a violent explostion, called a nova. "It's a well-tested theory," Impey said. Cosmic connections Got a question?
List of airlines of the United States This is a list of airlines which have an Air Operator Certificate issued by the Federal Aviation Administration of the United States. Cities in bold indicate the airline is headquartered nearby. Contents: Top - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z See also SkyWest Airlines (as Delta Connection) CRJ-700 References[edit] See also[edit] Lunar Reconnaissance Orbiter Camera How to be in two places at the same time - physics-math - 19 July 2011 An ambitious experiment to make a glass sphere exist in two places at once could provide the most sensitive test of quantum theory yet. The experiment will place a sphere containing millions of atoms – making it larger than many viruses – into a superposition of states in different places, say researchers in Europe. Physicists have questioned whether large objects can follow quantum laws ever since Erwin Schrödinger's thought-experiment suggested a cat could exist in a superposition of being both alive and dead. The idea is to zap a glass sphere 40 nanometres in diameter with a laser while it is inside a small cavity. The experiment will have to be carried out in high vacuum and at extremely low temperatures so that the sphere is not disturbed by thermal noise or air molecules, says lead author Oriol Romero-Isart from the Max Planck Institute of Quantum Optics in Garching, Germany. No overlap This will be particularly valuable in providing tests for quantum mechanics, the researchers say.
Interactive 3D model of Solar System Planets and Night Sky How Old is the Milky Way ? eso0425 — Science Release VLT Observations of Beryllium in Two Old Stars Clock the Beginnings 17 August 2004 Observations by an international team of astronomers [1] with the UVES spectrometer on ESO's Very Large Telescope at the Paranal Observatory (Chile) have thrown new light on the earliest epoch of the Milky Way galaxy. The age of the Milky Way How old is the Milky Way? Globular clusters and the ages of stars Modern astrophysics is capable of measuring the ages of certain stars, that is the time elapsed since they were formed by condensation in huge interstellar clouds of gas and dust. Stars belonging to a globular cluster were born together, from the same cloud and at the same time. Still, those cluster stars were not the first stars to be formed in the Milky Way. Despite intensive searches, it has until now not been possible to find less massive stars of this first generation that might still be shining today. Beryllium to the rescue Galactic cosmic rays and the Beryllium clock Notes
SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids Time Travel Impossible, Say Scientists — Hong Kong physicists say they have proven a single photon cannot travel faster than the speed of light. — This demonstrates that time travel is impossible, they say. Hong Kong physicists say they have proved that a single photon obeys Einstein's theory that nothing can travel faster than the speed of light — demonstrating that outside science fiction, time travel is impossible. The Hong Kong University of Science and Technology research team led by Du Shengwang said they had proved that a single photon, or unit of light, "obeys the traffic law of the universe." "Einstein claimed that the speed of light was the traffic law of the universe or in simple language, nothing can travel faster than light," the university said on its website. NEWS: Warp Drive Engine Would Travel Faster Than Light "Professor Du's study demonstrates that a single photon, the fundamental quanta of light, also obeys the traffic law of the universe just like classical EM (electromagnetic) waves."