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New Horizons' Discoveries Keep Coming Poster
Solar System, Planets of Our Solar System
Sep 27, 2017
New Horizons is on its way to new discoveries deep in the Kuiper Belt – a region inhabited by ancient remnants from the dawn of the solar system.
Solar System, Planets of Our Solar System, Sky Watching
Mar 4, 2016
On March 8th, 2016 Earth and Jupiter will have a close encounter. The giant planet will be "up all night," soaring almost overhead at midnight and not setting until the sky brightens with the twilight hues of sunrise on March 9th. In July, the Juno mission will give us an even closer look.
Close Encounters with Jupiter Poster
Solar System, Planets of Our Solar System
Oct 27, 2015
NASA's Cassini Spacecraft is about to make a daring plunge through one of the plumes emerging from Saturn's moon Enceladus.
Close Encounter with Enceladus Poster
Solar System, Sky Watching
Oct 23, 2015
Look east before sunrise in late October for a beautiful conjunction of bright planets.
Dawn Triangle of Planets Poster
Solar System
Sep 22, 2015
On Sunday, Sep. 27th, the super Harvest Moon passed through the shadow of Earth, producing a lovely amber total lunar eclipse.
Total Eclipse of the Harvest Moon Poster
Solar System, Sky Watching
Aug 10, 2015
This week, Earth passes through a stream of debris from Comet Swift-Tuttle, source of the annual Perseid meteor shower. Forecasters say the show could be especially good this year because the Moon is nearly new when the shower peaks on Aug. 12-13.
A Good Year for Perseid Meteors Poster
Solar System, Planets of Our Solar System, Sky Watching
Jun 8, 2015
Venus and Jupiter are converging for a must-see close encounter at the end of June. It could be the best backyard sky show of 2015.
Amazing Sunset Sky Show Poster
Solar System
May 14, 2015
On Earth, a fast runner takes a few hours to complete a marathon. On Mars, it's taken 11 years. NASA's Opportunity rover crossed that finish line in 2015.
ScienceCasts: The First Martian Marathon
Solar System
May 11, 2015
May 11, 2015:  One day, when humans go to Mars, they might find that, occasionally, the Red Planet has green skies.  In late Dec. 2014, NASA's MAVEN spacecraft detected evidence of widespread auroras in Mars's northern hemisphere.  The "Christmas Lights," as researchers... Read More
Universe, Sun, Solar System
May 5, 2015
May 5, 2015:  As May of 2015 unfolds, Halley's Comet is more than 5 billion kilometers from Earth, receding into the inky blackness of the outer solar system, where its looping orbit takes it every 76 years.  Dim and distant, history's most famous comet won't be back until sometime... Read More
Universe, Earth, Solar System
Apr 30, 2015
April 30, 2015:  The planet closest to the Sun is, ironically, one of the coldest. That’s just one of many mind-bending discoveries about Mercury that NASA’s MESSENGER spacecraft beamed back to Earth over the past 7 years.  Earlier today, the mission ended with a crash as spectacular as... Read More
Global image data from MESSENGER spacecraft
Solar System
Apr 21, 2015
At the end of a day devoted to Earth, people can look to the heavens for a beautiful shower of Lyrid meteors.
ScienceCasts: Earth Day Meteor Shower
Solar System
Apr 21, 2015
April 21, 2015:  When NASA's New Horizons spacecraft flies by Pluto this July, the spacecraft's high-resolution cameras will spot many new landforms on the dwarf planet's unexplored surface.  There could be mountains, craters, rilles, valleys and, of course, the unknown. They are... Read More
Solar System
Mar 30, 2015
On Saturday morning, April 4th, sky watchers in the USA can see a brief but beautiful total eclipse of the Moon.
ScienceCasts: Total Eclipse of the Moon
Solar System
Feb 27, 2015
Feb 27, 2015:  Dwarf planet Ceres continues to puzzle scientists as NASA's Dawn spacecraft gets closer to being captured into orbit around the object. The latest images from Dawn, taken nearly 29,000 miles (46,000 kilometers) from Ceres, reveal that a bright spot that... Read More