The Eridanus Void. This area shows almost no signs of cosmic matter, meaning no stars, planets, solar systems or clouds of cosmic dust. Researchers couldn't even find dark matter, which is invisible but measurable by its gravitational pull. There were also no signs of black holes that might have gobbled up the matter once present in the region. Via @littlemoke

The Eridanus Void. This area shows almost no signs of cosmic matter, meaning no stars, planets, solar systems or clouds of cosmic dust. Researchers couldn't even find dark matter, which is invisible but measurable by matter once present in the region.

How Interstellar Space Travel Works (Infographic) by Karl Tate, SPACE.com Infographics Artist

How Interstellar Space Travel Works (Infographic) -- To understand the difficulty of interstellar travel, one must comprehend the incredible distance involved.

Shell-Enclosed Alien Planets Could be New Home for Humans. Infographic: how an engineer proposes to encase planets inside a shell

Shell-Enclosed Alien Planets Could be New Home for Humans. Infographic: how an engineer proposes to encase planets inside a shell

Space builders aboard the International Space Station. | The 17 Most Spectacular NASA Photos Ever Taken

The International Space Station (ISS) is a habitable artificial satellite in low Earth orbit. Astronauts Robert L. Curbeam (USA) and Christer Fuglesang (Sweden) work to attach a new truss segment to the ISS and begin to upgrade the power grid.

The rocky alien planet Kepler 186f is an Earth-size world that could have liquid water on its surface, and possibly even life. It orbits a star 490 light-years away. See the full details of alien planet Kepler-186f in this Space.com infographic. Credit: By Karl Tate, Infographics Artist via @robbinjimmerson

The rocky alien planet Kepler is an Earth-size world that could have liquid water on its surface, and possibly even life. It orbits a star 490 light-years away.

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