tech e blog

Moonquake

We all know about earthquakes, but did you know that moonquakes also exist? That's right, they were first discovered by the Apollo astronauts. Moonquakes are much weaker than the largest earthquakes, though they can last for up to an hour, due to the lack of water to dampen seismic vibrations. Information about moonquakes comes from seismometers placed on the Moon by Apollo astronauts from 1969 through 1972. The instruments placed by the Apollo 12, 14, 15 and 16 functioned perfectly until they were switched off in 1977. The first three kinds of moonquakes mentioned above tend to be mild; however, shallow moonquakes can register up to 5.5 on the Richter scale. Between 1972 and 1977, twenty-eight shallow moonquakes were observed. On Earth, quakes of magnitude 4.5 and above can cause damage to buildings and other rigid structures. Continue reading for more.

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Parallel Universes

Scientists from Griffiths University and the University of California claim that parallel universes really do exist and that rather than evolving independently, they influence one another by a subtle force of repulsion. Howard Wiseman, a professor in Physics at Griffith University, says: "The idea of parallel universes in quantum mechanics has been around since 1957. In the well-known 'Many-Worlds Interpretation'', each universe branches into a bunch of new universes every time a quantum measurement is made." Continue reading for a detailed documentary by National Geographic and more information.

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Cool Space Facts

Photo credit: Buzzfeed

All the planets of the Solar System orbit the Sun in an anti-clockwise direction as viewed from above Earth's north pole. Most planets also rotate on their axes in an anti-clockwise direction, but Venus rotates clockwise (called "retrograde" rotation) once every 243 Earth days - the slowest rotation period of any planet. Because its rotation is so slow, it is highly spherical. A Venusian sidereal day thus lasts longer than a Venusian year (243 versus 224.7 Earth days). Click here to view the first image in today's viral picture gallery. Continue reading for a viral video of the world's heaviest fireworks shell being launched in Japan.

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Alan Eustace

Alan Eustace, a 57-year-old senior vice president of Knowledge at Google, was lifted up to the edge of space earlier this morning by a balloon filled with 35,000 cubic feet of helium, from an abandoned runway at an airport in New Mexico. He fell faster than the speed of sound and actually broke Felix Baumgartner's world altitude record set just two years ago by hopping from 135,000-feet. Continue reading for the video and more information.

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Black Hole Facts

Despite its invisible interior, the presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation such as light. Matter falling onto a black hole can form an accretion disk heated by friction, forming some of the brightest objects in the universe. If there are other stars orbiting a black hole, their orbit can be used to determine its mass and location. Such observations can be used to exclude possible alternatives (such as neutron stars). In this way, astronomers have identified numerous stellar black hole candidates in binary systems, and established that the core of the Milky Way contains a supermassive black hole of about 4.3 million solar masses. Continue reading for more.

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Boeing X-37B

Nobody, not even internet users, know what the Air Force's X-37B secret unmanned spacecraft was working on (or watching) for the past two years. It landed at 9:24am local time on October 17, 2014 at Vandenberg Air Force Base in California, according to the Air Force's 30th Space Wing. What we do know is that its size doesn't allow for much more than avionics equipment, fuel for the thrusters, and a mysterious cavity about the size of a truck bed that could that could possibly contain sensors, experiments, hardware, or even a bomb. Click here to view the first image in today's viral picture gallery. Continue reading for a viral video about the largest collection of James Bond memorabilia.

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Stargazing Rocky Mountain National Park

Rocky Mountain National Park, located in the north-central region of the U.S. state of Colorado, features majestic mountain views, mountain lakes, a variety of wildlife, varied climates and environments - from wooded forests to mountain tundra - and easy access to back-country trails and campsites. Plus, it's a great place for geeks to go stargazing at night, especially during the summer. Simply bring a comfortable chair, along with a telescope if you want an up-close look, and you'll be set to take everything in. Continue reading for more.

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Sun Jack-o-Lantern

At first glance, this may look like a Jack-o'-Lantern, but it's just the sun. NASA astronaut has just released this image in time for Halloween, which blends together two separate wavelengths usually seen in gold and yellow to create the stunning effect. "The active regions appear brighter because those are areas that emit more light and energy - markers of an intense and complex set of magnetic fields hovering in the sun's atmosphere, the corona," says the government agency. Click here to view the first image in this week's funny demotivational posters gallery. Continue reading for a viral video of Malala Yousafzai, the youngest Nobel Peace Prize winner ever.

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Horsehead Nebula

The Horsehead Nebula (above) is a dark nebula in the constellation Orion, located just to the south of the star Alnitak, which is farthest east on Orion's Belt, and is part of the much larger Orion Molecular Cloud Complex. It was first recorded in 1888 by Scottish astronomer Williamina Fleming on photographic plate B2312 taken at the Harvard College Observatory. The Horsehead Nebula is approximately 1500 light years from Earth. It is one of the most identifiable nebulae because of the shape of its swirling cloud of dark dust and gases, which bears some resemblance to a horse's head when viewed from Earth. Continue reading for more.

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Butterfly Nebula

NGC 6302, also known as the Bug Nebula or Butterfly Nebula, is a bipolar planetary nebula in the constellation Scorpius. The structure in the nebula is among the most complex ever observed in planetary nebulae. Due to its composition, when observed with a telescope, its shape reminds many of a butterfly. Continue reading for five things you may not have known about this nebula.

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