#Earth

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Earth and Kepler-186F

Scientists discover another Earth-like planet

NASA's Kepler Space Telescope discovered an Earth-like planet orbiting a start within the habitable zone of our galaxy, Kepler-186f, approximately 500 light years away from Earth in the Cygnus constellation.  This habitable zone is the region around a star where planetary-mass objects with sufficient atmospheric pressure can support liquid water at their surfaces.  This discovery is rated the first Earth-sized planet to be found in the habitable zone of another star.Kepler-186 SystemKeep Reading
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Earth's second moon

Earth's Second Moon, 3753 Cruithne

Everyone knows and loves the moon.  What you may not know is that it's not Earth's only natural satellite.  In 1997, another body was discovered, 3753 Cruithne, also called a quasi-orbital satellite of Earth.  This means that Cruithne doesn't orbit Earth in a nice ellipse the same way our moon does.  Instead, Cruithne scuttles around the inner solar system in what's called a horseshoe orbit. The video illustrates what a horseshoe orbit looks like, specifically for Cruithne orbiting around Earth.  This is something not widely known, but this type of orbit is actually pretty common in our solar system.  Cruithne's orbit is so wide, that its sometimes goes into the neighborhood of Venus and Mars.  It orbits the sun about once a year, but it takes nearly 800 years to complete this messy ring shape around Earth's orbit.Keep Reading
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Kepler-186f

NASA discovers Earth-sized planet that could be habitable

NASA has discovered an Earth-sized planet that could potentially be habitable.  Designated Kepler-186f and discovered about 500 light years away from home in the constellation Cygnus, this new planet is likely a rocky world and may be similar to Venus, Mars, and Earth.  The system is also home to four other planets, orbiting around a host star about half the size and mass of the sun. Elisa Quintana of the Search for Extraterrestrial Intelligence Institute at NASA stated:Keep Reading
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