The flag of Israel was adopted on October 28, 1948, five months after the establishment of the State of Israel. The symbol in the centre represents the Star of David.
La sonda espacial con destino a Saturno pone a prueba la teoría de Einstein
Concepto artístico del experimento de relatividad general.
Un experimento realizado por científicos italianos con datos de la nave espacial Cassini de la NASA, actualmente en camino a Saturno, confirma la teoría de la relatividad general de Einstein con una precisión 50 veces mayor que las mediciones anteriores.
Los resultados aparecen en la edición del 25 de septiembre de la revista Nature. Forman parte de una colaboración científica entre la NASA y la Agencia Espacial Italiana. El experimento tuvo lugar en el verano de 2002, cuando la nave espacial y la Tierra se encontraban en lados opuestos del Sol, separados por una distancia de más de mil millones de kilómetros (aproximadamente 621 millones de millas).
Los investigadores observaron el cambio de frecuencia de las ondas de radio que se transmitían desde y hacia la nave espacial a medida que pasaban cerca del Sol. Midieron con precisión el cambio en el tiempo de ida y vuelta de la señal de radio a medida que viajaba cerca del Sol. El tiempo de ida y vuelta es el tiempo que tarda la señal transmitida desde la estación de la Red del Espacio Profundo en Goldstone, California, hasta la nave espacial en el otro lado del Sol y de regreso viajando a la velocidad de la luz.
"La importancia científica de estos resultados es la confirmación de la teoría de la relatividad general y la concordancia con las formulaciones de Einstein con una precisión experimental sin precedentes", dijo Sami Asmar, director del Radio Science Group, que adquirió los datos para este experimento en el Laboratorio de Propulsión a Chorro de la NASA en Pasadena, California. "La importancia tecnológica del experimento es la capacidad de superar el duro entorno solar mediante enlaces de radio".
Los investigadores midieron en qué medida la gravedad del Sol curvaba un rayo electromagnético, en este caso la señal de radio transmitida por la nave espacial y recibida por las estaciones terrestres.
Según la teoría de la relatividad general, un objeto masivo como el Sol hace que el espacio-tiempo se curve, y un haz de ondas de radio (o luz) que pasa por el Sol tiene que viajar más lejos debido a la curvatura. La distancia adicional que recorren las ondas de radio desde Cassini pasando por el Sol hasta la Tierra retrasa su llegada; la magnitud del retraso proporciona una prueba sensible de las predicciones de la teoría de Einstein. Aunque se esperan desviaciones de la relatividad general en algunos modelos cosmológicos, no se encontró ninguna en este experimento.
Las pruebas de la relatividad general tienen importantes implicaciones cosmológicas. La cuestión no es si la relatividad general es verdadera o falsa, sino a partir de qué nivel de precisión deja de describir la gravedad de forma realista.
Pruebas anteriores de la relatividad general confirmaron la predicción de Einstein con una precisión de una parte por mil. Esta precisión se logró en 1979 utilizando las sondas Viking en Marte. El experimento Cassini la confirmó con una precisión de 20 partes por millón. La clave de esta mejora ha sido la adopción de nuevas tecnologías en las telecomunicaciones espaciales.
El experimento no se hubiera podido realizar con este nivel de precisión en el pasado debido al ruido en el enlace de radio introducido por la corona solar. Con el experimento Cassini, este obstáculo se superó equipando el sistema de comunicación de la nave espacial con múltiples enlaces en diferentes frecuencias. Esta nueva capacidad en la nave espacial Cassini y en la antena de 34 metros (112 pies) de diámetro en Goldstone, permitió a los científicos eliminar los efectos del plasma interplanetario y solar de los datos de radio. Además, el ruido de la atmósfera de la Tierra se redujo considerablemente mediante un equipo especial instalado en el complejo Goldstone. Estos avances tecnológicos desarrollados para la misión Cassini han llevado a precisiones sin precedentes en las mediciones de velocidad, lo que beneficia a futuros experimentos científicos, así como a la navegación en el espacio profundo.
Los experimentos son parte de una serie de experimentos de radiociencia planificados para la fase de crucero de la misión, incluida la búsqueda de ondas gravitacionales de baja frecuencia.
Cassini comenzará a orbitar Saturno el 1 de julio de 2004 y liberará su sonda Huygens unos seis meses después para descender a través de la espesa atmósfera de la luna Titán.
Cassini-Huygens es una misión cooperativa de la NASA, la Agencia Espacial Europea y la Agencia Espacial Italiana. El JPL, una división de Caltech, administra la misión para la Oficina de Ciencias Espaciales de la NASA en Washington, DC. Los autores del artículo de Nature, "Una nueva prueba de la relatividad general con la misión espacial Cassini", son el Dr. Bruno Bertotti de la Universidad de Pavía, Italia; el Dr. Luciano Iess de la Universidad de Roma "La Sapienza", Italia; y el Dr. Paolo Tortora de la Universidad de Bolonia, Italia.
On June 23rd, 1944, a ceremony was organized to award the Silver Star to some American soldiers on the “Place de la république”. Danièle Laisney a little girl, was killed tragically by a German shrapnel shell while giving a bouquet of flowers to an American officer.
She was only 4 years old....
Town Hall monument to honor the 101st Airborne PIR & GIR
This striking, high-resolution image of the Arc de Triomphe, in Paris, was captured by Planet SkySat – a fleet of satellites that have just joined ESA’s Third Party Mission Programme in April 2022. The Arc de Triomphe, or in full Arc de Triomphe de l’Étoile, is an iconic symbol of France and one of the world’s best-known commemorative monuments. The triumphal arch was commissioned by Napoleon I in 1806 to celebrate the military achievements of the French armies. Construction of the arch began the following year, on 15 August (Napoleon’s birthday).
The arch stands at the centre of the Place Charles de Gaulle, the meeting point of 12 grand avenues which form a star (or étoile), which is why it is also referred to as the Arch of Triumph of the Star. The arch is 50 m high and 45 m wide.
The names of all French victories and generals are inscribed on the arch’s inner and outer surfaces, while the Tomb of the Unknown Soldier from World War I lies beneath its vault. The tomb’s flame is rekindled every evening as a symbol of the enduring nature of the commemoration and respect shown to those who have fallen in the name of France.
The Arc de Triomphe’s location at the Place Charles de Gaulle places it at the heart of the capital and the western terminus of the Avenue des Champs-Élysées (visible in the bottom-right of the image). Often referred to as the ‘most beautiful avenue in the world’, the Champs-Élysées is known for its theatres, cafés and luxury shops, as the finish of the Tour de France cycling race, as well as for its annual Bastille Day military parade.
This image, captured on 9 April 2022, was provided by Planet SkySat – a fleet of 21 very high-resolution satellites capable of collecting images multiple times during the day. SkySat’s satellite imagery, with 50 cm spatial resolution, is high enough to focus on areas of great interest, identifying objects such as vehicles and shipping containers.
SkySat data, along with PlanetScope (both owned and operated by Planet Labs), serve numerous commercial and governmental applications. These data are now available through ESA’s Third Party Mission programme – enabling researchers, scientists and companies from around the world the ability to access Planet’s high-frequency, high-resolution satellite data for non-commercial use.
Within this programme, Planet joins more than 50 other missions to add near-daily PlanetScope imagery, 50 cm SkySat imagery, and RapidEye archive data to this global network.
Peggy Fischer, Mission Manager for ESA’s Third Party Missions, commented, “We are very pleased to welcome PlanetScope and SkySat to ESA’s Third Party Missions portfolio and to begin the distribution of the Planet data through the ESA Earthnet Programme.
“The high-resolution and high-frequency imagery from these satellite constellations will provide an invaluable resource for the European R&D and applications community, greatly benefiting research and business opportunities across a wide range of sectors.”
To find out more on how to apply to the Earthnet Programme and get started with Planet data, click here.
This striking, high-resolution image of the Arc de Triomphe, in Paris, was captured by Planet SkySat – a fleet of satellites that have just joined ESA’s Third Party Mission Programme in April 2022. The Arc de Triomphe, or in full Arc de Triomphe de l’Étoile, is an iconic symbol of France and one of the world’s best-known commemorative monuments. The triumphal arch was commissioned by Napoleon I in 1806 to celebrate the military achievements of the French armies. Construction of the arch began the following year, on 15 August (Napoleon’s birthday).
The arch stands at the centre of the Place Charles de Gaulle, the meeting point of 12 grand avenues which form a star (or étoile), which is why it is also referred to as the Arch of Triumph of the Star. The arch is 50 m high and 45 m wide.
The names of all French victories and generals are inscribed on the arch’s inner and outer surfaces, while the Tomb of the Unknown Soldier from World War I lies beneath its vault. The tomb’s flame is rekindled every evening as a symbol of the enduring nature of the commemoration and respect shown to those who have fallen in the name of France.
The Arc de Triomphe’s location at the Place Charles de Gaulle places it at the heart of the capital and the western terminus of the Avenue des Champs-Élysées (visible in the bottom-right of the image). Often referred to as the ‘most beautiful avenue in the world’, the Champs-Élysées is known for its theatres, cafés and luxury shops, as the finish of the Tour de France cycling race, as well as for its annual Bastille Day military parade.
This image, captured on 9 April 2022, was provided by Planet SkySat – a fleet of 21 very high-resolution satellites capable of collecting images multiple times during the day. SkySat’s satellite imagery, with 50 cm spatial resolution, is high enough to focus on areas of great interest, identifying objects such as vehicles and shipping containers.
SkySat data, along with PlanetScope (both owned and operated by Planet Labs), serve numerous commercial and governmental applications. These data are now available through ESA’s Third Party Mission programme – enabling researchers, scientists and companies from around the world the ability to access Planet’s high-frequency, high-resolution satellite data for non-commercial use.
Within this programme, Planet joins more than 50 other missions to add near-daily PlanetScope imagery, 50 cm SkySat imagery, and RapidEye archive data to this global network.
Peggy Fischer, Mission Manager for ESA’s Third Party Missions, commented, “We are very pleased to welcome PlanetScope and SkySat to ESA’s Third Party Missions portfolio and to begin the distribution of the Planet data through the ESA Earthnet Programme.
“The high-resolution and high-frequency imagery from these satellite constellations will provide an invaluable resource for the European R&D and applications community, greatly benefiting research and business opportunities across a wide range of sectors.”
To find out more on how to apply to the Earthnet Programme and get started with Planet data, click here.
Foundation stone. On August 15, 1806, Emperor Napoleon I's birthday, the foundation stone of the building was laid at a depth of eight meters, between the two southern pillars.
"[T]his makes it rather clear that Janet Jackson, via exposing her right breast and her juxtaposition with Beyonce (representing the American spirit), was 'designed' to embody Lady Justice/Liberty - signifying or prompting the rebirth of the spirit of 'Columbia'. The prevalent 'blackness' additionally alludes to the pertinence of another related figure Mary Magdalene, recently made popular by the huge success of the book The Da Vinci Code, as this biblical/esoteric 'wife' of Jesus - embodying the feminine and sexuality - was sometimes portrayed as the 'Black Madonna'."
(EL SALMO 119, ESTA ESCRITO EN FUNCION A LAS 22 LETRAS HEBREAS. OSEA QUE EN UN CONTEXTO GRIEGO LA REFERENCIA AL ALFA Y EL OMEGA, ES EN EL CONTEXTO A LAS 22 LETRAS HEBREAS. EL DISEÑO DE LA TORRE EIFFEL EN FUNCION A DICHO SALMO, ES UNA REFERENCIA AL REGOCIJO EN LA TORA, OSEA EL OCTAVO DIA DE LA FIESTA DE LOS TABERNACULOS, LEVITICO 23:33, EN EL CUAL LOS JUDIOS LEEN EL SALMO 119.)
The tallest monument in the United States was completed on this date in 1965. The Gateway Arch stands 630 feet tall and is the focal point of the St. Louis skyline. Constructed out of concrete and stainless steel, the arch has a tram system built within it that will take visitors to the very top where they have an amazing view of the city. The arch was built for two main reasons, first was to create jobs, but maybe more importantly to commemorate the Westward Expansion of the United States. According to reports, the cost of the project was estimated to be around $13 million which in today’s money would be around $190 million. The arch has more than 4 million visitors each year and is an important part of the city’s economy.
The last rivet was fitted which completed the installation of the Statue of Liberty on this date in 1886. President Grover Cleveland was on hand to perform the dedication ceremony as well as numerous American and French dignitaries. Lady Liberty was a gift from the people of France to the people of the United States to commemorate their friendship during the American Revolution. The 151-foot tall statue was originally built in Paris then disassembled and shipped to the U.S. in an estimated 200 different crates. The steel framework was designed by Alexandre-Gustave Eiffel, who made a name for himself by designing the Eiffel Tower. But the overall design was done by French sculptor Frederic-Auguste Bartholdi.
3. 1922: First college football game broadcast nationwide on the radio
It was on this date in 1922 the first college football game was broadcast nationwide on the radio. The Princeton Tigers went up against the Chicago Maroons at Stagg Field in Chicago. The Maroons were heavily favored and were one of the most dominant teams in the Big Ten conference. Unfortunately, the broadcast wasn’t live during the game; that didn’t happen until two years later in 1924. What would normally happen was a reporter would sit in the press box at the stadium and would phone the details of what was happening back to the station. An announcer would be standing by to re-enact the play by play using the help of sound effects and sometimes an in-studio audience. Even though Princeton was the underdog, they managed to pull off a major upset and then went on to finish the season with an undefeated record.
Aman named Al Bielek, who claimed to be a test subject of various secret U.S. Military Experiments, said that on August 12, 1943, the U.S. Navy carried out an experiment called the “Philadelphia Experiment” on the USS Eldridge, at the Philadelphia Naval Shipyard, after installing special equipment on it. In this test, they allegedly send the ship and all its crew members 10 minutes back in time, making it apparently ‘invisible’, and then bring them back to the present time.
MRU
As a consequence, many of the sailors onboard went insane, many lost their memory, some were engulfed in flames to their deaths, and others molecularly bonded with the ship’s metal structure. However, according to Bielek, he and his brother, who were aboard the experiment ship at the time, jumped off just before the time warp opened and survived without any injuries. There’s a huge argument as to whether this event is true or not. But if such an experiment really happened then it’s undoubtedly one of the eeriest mysteries in human history.
The Philadelphia Experiment: Project Rainbow
MRU CC
According to Al Bielek, August 12, 2003, is an extremely important anniversary date in the U.S. Navy’s secret World War II invisibility project known as the Philadelphia Experiment. Bielek claimed that ― on August 12, 1943 ― the Navy, after installing special equipment on the USS Eldridge, made the ship and its crew disappear from Philadelphia harbour for over 4 hours.
The exact nature of this test is open to speculation. Possible tests include experiments in magnetic invisibility, radar invisibility, optical invisibility or degaussing ― rendering the ship immune to magnetic mines. The tests were conducted, only to produce undesirable results. Afterwards, the project — supposedly called “Project Rainbow” — was cancelled.
What Really Happened During The Philadelphia Experiment?
Two separate sets of bizarre events make up the “Philadelphia Experiment.” Both revolve around a Navy Destroyer escort, the USS Eldridge, with the events taking place on two separate days in the summer and fall of 1943.
In the first experiment, an alleged method of electrical field manipulation allowed the USS Eldridge to be rendered invisible on July 22, 1943, in the Philadelphia Naval Shipyard. The second rumoured experiment was the teleportation and small-scale time travel (with the ship sent a few seconds in the past) of the USS Eldridge from the Philadelphia Naval Shipyard to Norfolk, Virginia, on October 28, 1943.
Horrible tales of mangled seamen and sailors stuck within the metal of the USS Eldridge often accompany this experiment, with the USS Eldrige reappearing seconds later in the waters around Philadelphia. Recitation of the events surrounding the second Philadelphia Experiment often includes a cargo and troop transport vessel, the SS Andrew Furuseth. The lore of the second experiment claims those on board the Andrew Furuseth viewed the USS Eldridge and it’s crew as they teleported into Norfolk momentarily before the ship returned to the waters of Philadelphia.
Prior to the mid-1950s, no rumours of bizarre activity surrounded any teleportation or invisibility experiments in North America during the 1940s, let alone in the area surrounding Philadelphia.
Carl Meredith Allen, using the alias Carlos Miguel Allende, sent a series of letters to the astronomer and writer Morris K. Jessup. Jessup authored several early UFO books including the mildly successful The Case For The UFO. Allen claimed to be on the SS Andrew Furuseth during the second experiment, witnessing the USS Eldridge emerge in the waters of Norfolk and quickly disappear into thin air.
Carl Allen supplied no proof to verify what he claimed to witness on October 28, 1943. He did win the mind of Morris Jessup, who began to champion Allen’s view of the Philadelphia Experiment. Jessup, however, died four years after his first contact with Allen from an apparent suicide.
Moving a ship weighing several thousand tons leaves an inevitable paper trail. On the date of the Philadelphia “Invisibility” Experiment, July 22, 1943, the USS Eldridge had yet to be commissioned. The USS Eldridge spent the day of the alleged teleportation experiments, October 28, 1943, safely within a New York harbour, waiting to escort a naval convoy to Casablanca. The SS Andrew Norfolk spent October 28, 1943, sailing across the Atlantic Ocean en route to the Mediterranean port city of Oran, further discrediting Carl Allen’s comments.
And in the early 1940s, the Navy did conduct experiments to make naval vessels “invisible” in the Philadelphia Naval Shipyards, but in a different manner and with a completely different set of desired results.
In these experiments, researchers ran an electric current through hundreds of meters of electrical cable around the hull of a ship to see if they could make the ships “invisible” to underwater and surface mines. Germany deployed magnetic mines in naval theatres — mines that would latch on to the metal hull of ships as they came near. In theory, this system would make the ships invisible to the magnetic properties of the mines.
Seventy years later, we are left without a shred of credible evidence for the Philadelphia Experiment(s), yet rumours persist. If you are still unconvinced, think of the situation from a different viewpoint. No incident, regardless of the horrific nature, would stall the development of teleportation technology if the military believed it feasible. Such a resource would be an invaluable front line weapon in war and the backbone of many commercial industries, yet decades later, teleportation is still caged within the realm of science fiction.
In 1951, the United States transferred the Eldrige to the country of Greece. Greece christened the ship the HS Leon, using the vessel for joint U.S. operations during the Cold War. The USS Eldridge met an unceremonious end, with the decommissioned ship sold to a Grecian firm as scrap after five decades of service.
In 1999, fifteen members of the USS Eldridge crew held a reunion in Atlantic City, with the veterans bemoaning the decades of questioning surrounding the vessel they served on.