Holometer: A Microscope into Space and Time Holometer: A Microscope into Space and Time

How different are space and time at very small scales? To explore the unfamiliar domain of the miniscule Planck scale -- where normally unnoticeable quantum effects might become dominant -- a newly developed instrument called the Fermilab Holometer has begun operating at the Fermi National Accelerator Laboratory (Fermilab) near Chicago, Illinois, USA. The instrument seeks to determine if slight but simultaneous jiggles of a mirror in two directions expose a fundamental type of holographic noise that always exceeds a minimum amount. Pictured above is one of the end mirrors of a Holometer prototype. Although the discovery of holographic noise would surely be groundbreaking, the dependence of such noise on a specific laboratory length scale would surprise some spacetime enthusiasts. One reason for this is the Lorentz Invariance postulate of Einstein's special relativity, which states that all length scales should appear contracted to a relatively moving observer -- even the diminutive Planck length. Still, the experiment is unique and many are curious what the results will show. via NASA http://ift.tt/W58p6X

Summer sunsets over America's public lands are the best. Photo: @YosemiteNPS. by usinterior

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As summer winds down - fall is a wonderful time to visit Great Basin National Park in Nevada - especially for the Astronomy Festival coming this September 18-20. See details at www.BestNightSky.com. by usinterior

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Airglow Ripples over Tibet Airglow Ripples over Tibet

Why would the sky look like a giant target? Airglow. Following a giant thunderstorm over Bangladesh in late April, giant circular ripples of glowing air appeared over Tibet, China, as pictured above. The unusual pattern is created by atmospheric gravity waves, waves of alternating air pressure that can grow with height as the air thins, in this case about 90 kilometers up. Unlike auroras powered by collisions with energetic charged particles and seen at high latitudes, airglow is due to chemiluminescence, the production of light in a chemical reaction. More typically seen near the horizon, airglow keeps the night sky from ever being completely dark. via NASA http://ift.tt/1vCd543

Happy Labor Day everyone! We hope you got a chance to visit America’s public lands this holiday weekend. This photo was taken in Isle Royale National Park. Explore a rugged, isolated island where wolves and moose abound, far from the sights and sounds of civilization. Surrounded by Lake Superior, Isle Royale offers unparalleled solitude and adventures for backpackers, hikers, boaters, kayakers, canoeists and scuba divers. Here, amid stunning scenic beauty, you'll find opportunities for reflection and discovery, and make memories that last a lifetime. Photo Adam Jewell (http://ift.tt/18oFfjl) by usinterior

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Space Shuttle and Space Station Photographed Together Space Shuttle and Space Station Photographed Together

How was this picture taken? Usually, pictures of the shuttle, taken from space, are snapped from the space station. Commonly, pictures of the space station are snapped from the shuttle. How, then, can there be a picture of both the shuttle and the station together, taken from space? The answer is that during the Space Shuttle Endeavour's last trip to the International Space Station in 2011 May, a supply ship departed the station with astronauts that captured a series of rare views. The supply ship was the Russian Soyuz TMA-20 which landed in Kazakhstan later that day. The above spectacular image well captures the relative sizes of the station and docked shuttle. Far below, clouds of Earth are seen above a blue sea. via NASA http://ift.tt/1qVSILQ

Amazing sunset this weekend over Glacier National Park (@GlacierNPS). by usinterior

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The Starry Sky under Hollow Hill The Starry Sky under Hollow Hill

Look up in New Zealand's Hollow Hill Cave and you might think you see a familiar starry sky. And that's exactly what Arachnocampa luminosa are counting on. Captured in this long exposure, the New Zealand glowworms scattered across the cave ceiling give it the inviting and open appearance of a clear, dark night sky filled with stars. Unsuspecting insects fooled into flying too far upwards get trapped in sticky snares the glowworms create and hang down to catch food. Of course professional astronomers wouldn't be so easily fooled, although that does look a lot like the Coalsack Nebula and Southern Cross at the upper left ... via NASA http://ift.tt/1n77RoL

St. Mary Lake sits within the St. Mary Valley—”the eastern gateway to @GlacierNPS. Prairies, mountains, and forests all converge in the valley to create a diverse and rich habitat for plants and animals. The open meadows surrounded by dense forests can afford some great opportunities for wildlife viewing.” Photo: Kim Keating, @USGS by usinterior

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The Wizard Nebula The Wizard Nebula

Open star cluster NGC 7380 is still embedded in its natal cloud of interstellar gas and dust popularly known as the Wizard Nebula. Seen with foreground and background stars along the plane of our Milky Way galaxy it lies some 8,000 light-years distant, toward the constellation Cepheus. A full moon would easily fit inside this telescopic view of the 4 million year young cluster and associated nebula, normally much too faint to be seen by eye. Made with telescope and camera firmly planted on Earth, the image reveals multi light-year sized shapes and structures within the Wizard in a color palette made popular in Hubble Space Telescope images. Recorded with narrowband filters, the visible wavelength light from the nebula's hydrogen, oxygen, and sulfur atoms is transformed into green, blue, and red colors in the final digital composite. But there is still a trick up the Wizard's sleeve. Sliding your cursor over the image (or following this link) will make the stars disappear, leaving only the cosmic gas and dust of the Wizard Nebula. via NASA http://ift.tt/1u2ZCy5