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“But beyond our backyard, all the other galaxies, groups, and clusters are accelerating away from us. Once you go about 4-5 million light years away, dark energy causes space to expand faster than gravity attracts other objects across space. Over time, every other galaxy will see its distance and recession speed increase from our perspective.”

Our Universe isn’t only expanding, but is accelerating. This means that every galaxy, group, or cluster that isn’t already gravitationally bound to us is receding from us at a faster and faster rate as time goes on. With 2 trillion galaxies in the observable Universe, only approximately 70 of them are bound to our Local Group. Everything farther than about 4 or 5 million light years away from us is unbound, and therefore will recede from us forever and ever, with their recession speeds and cosmic distances increasing over time.

Here are the last galaxies we’ll ever be able to see or visit, as the relentless expansion of the Universe causes their disappearance from our cosmic horizon.
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In 1991, inspectors from the German government took aerial photographs of a small German town called Goseck and saw something strange.  On the ground, there appeared to be a giant circular ridge hidden beneath a field.  It would take archaeologists 12 years to realize that this ridge was the remains of an ancient solar observatory.  Archaeologists also found the remnants of ritual fires and human bones with cut marks on them indicating that the circle was not just for star gazing but also for human sacrifice.  Curiously, a 3,600 year old bronze disc was discovered just 25 kilometers away from the site and is considered to be the oldest concrete representation of the cosmos.  It shares a striking similarity with Goseck Circle.
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Sending artists into space to articulate global consciousness.

"Astronauts throughout history have struggled to convey their feelings of global connectedness and awe. But since poetry isn’t high on the lists of prerequisites for them.."

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Conspiracy theories aside, man has landed rovers on the moon and on Mars. But on something as “mobile” as an asteroid? Hardly. But that is exactly the achievement that the Japan Aerospace Exploration Agency or JAXA celebrated a few days ago when it…
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Robots are way ahead when it comes to space travel.
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An odd-shaped formation of gas and dust at the centre of the Milky Way, captured by the far-infrared cameras on board our #Herschel space observatory. The nearly continuous strip of dense and cold clumps of material forms an infinity symbol, or sideways 8, that is a few hundred light years across. In this image, the strip twists around an invisible axis running roughly from the top left to the bottom right.

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The Northern Lights, or Aurora Borealis, are one of Iceland's most famous attractions. These beautiful green (and sometimes white, pink and purple!) lights dance around the sky in Iceland quite frequently – but can only be seen in the wintertime. The reason: In order to see them, first of all, it needs to be dark.....
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