Mercury, First Planet From the Sun: Latest Discoveries

Mercury is our solar system's smallest planet.
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How to See Venus, Saturn, Jupiter & Mercury in July's Night Sky
Saturn in July 2015
July 1st, 2015
July offers opportunities to see Venus, Saturn, Jupiter and Mercury overhead. Here's how, and when, to spot them.
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Mystery on Mercury: Strange Pattern of Huge Cliffs Defy Explanation
Mercury's Southern Polar Region
June 10th, 2015
A baffling new mystery has turned up on Mercury — a pattern of giant cliffs and ridges on the planet's surface that defies any explanation that scientists have currently been able to offer.
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Five Mercury Craters Named to Celebrate End of NASA's MESSENGER Mission
Five Newly Named Craters on Mercury
May 1st, 2015
Just hours before NASA's MESSENGER spacecraft crashed into the surface of Mercury, the winners of a contest to name five new craters on the rocky planet were announced.
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Spot Elusive Planet Mercury in the Predawn Sky This Week
See Mercury in Predawn Sky: Northern Hemisphere
June 23rd, 2015
Mercury is a difficult object to spot, because it's always clinging closely to the sun’s apron strings. So you might be excused for missing its brief appearance this week in the dawn skies.
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Now Is the Best Time to See Mercury in the Night Sky This Year
On the evening of Thursday, May 7, Mercury was at its farthest from the sun for 2015. The next week is the best time of the year to see Mercury from the Northern Hemisphere.
May 8th, 2015
Now is the best time to see the planet Mercury in the evening sky just after sunset. Here's how to see Mercury in the night sky. Mercury was at it's farthest from the sun for the year on Thursday (May 7).
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Farewell, MESSENGER! NASA Probe Crashes Into Mercury
The Impact Zone of NASA's MESSENGER Mercury Probe
April 30th, 2015
NASA's MESSENGER probe crashed at 3:26 p.m. EDT Thursday (April 30), gouging a new crater into Mercury's surface. This violent end was inevitable for MESSENGER, which had been orbiting Mercury since March 2011 and had run out of fuel.
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Mercury Sole Survivor of Close Orbiting Planets Around the Sun
Kepler-444 System of Planets
June 12th, 2015
The area of our solar system where Mercury resides may once have held as many as four rocky planets. Violent collisions could have left it as the last survivor.
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Best Space Stories of the Week – May 3, 2015
Progress 59 Cargo Spaceship Launches, April 28, 2015
May 3rd, 2015
A Russian cargo vessel suffered a serious malfunction on its way to the space station, NASA's MESSENGER probe slammed into Mercury and the New Horizons spacecraft snapped the best-ever photos of Pluto. Here's a look at's top stories of the week.
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NASA Spacecraft Crashes Into Mercury Today: See the Live Slooh Webcast
NASA's MESSENGER spacecraft, shown here in an illustration, will crash into Mercury on April 30, ending its 11-year mission to the planet.
April 30th, 2015
NASA's MESSENGER spacecraft will smash into Mercury today, April 30, to end its mission and you can celebrate the probe's epic voyage in a live Slooh webcast. Here's how to watch at 3 p.m. EDT.
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