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Solar System, Sky Watching, Meteor Showers
Dec 30, 2016
Earth will pass through a stream of debris from comet 2003 EH1 on January 3, 2017, producing a shower of meteors known as the Quadrantids.
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 in 2061.Can’t... 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 some of its... Read More
Global image data from MESSENGER spacecraft
Earth
Apr 28, 2015
The Amazon rainforest and the Sahara desert seem utterly different. Yet NASA satellites have discovered a surprising connection that intimately links these two disparate parts of our planet.
ScienceCasts: Desert Dust Feeds Amazon Forests
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 all going to need... Read More
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
Universe
Apr 7, 2015
Citizen scientists scanning images from a NASA observatory have found "yellow balls" in space that may hold important clues to the mysteries of starbirth.
ScienceCasts: Citizen Scientists Discover Yellow Balls in Space
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
Sun
Mar 18, 2015
Tiny solar flares on the sun may be having an outsized effect on the temperature of the sun's atmosphere. To investigate, scientists will observe these "nanoflares" using a space telescope built for black holes.
ScienceCasts: The Mystery of Nanoflares
Sun
Mar 10, 2015
NASA is about to launch a fleet of spacecraft to investigate the mystery of "magnetic reconnection," which is making things explode across the cosmos.
ScienceCasts: Studying Earth's Magnetic Personality
Universe
Mar 5, 2015
March 5, 2015:  Mark your calendar. On Friday, March 6th, NASA’s Dawn spacecraft will enter orbit around Ceres, becoming the first spacecraft from Earth to visit a dwarf planet. "Dawn is about to make history," said Robert Mase, project manager for the Dawn mission at NASA’s Jet Propulsion... Read More
Ceres
ISS
Mar 4, 2015
The key to unraveling the mysterious cause of Alzheimer's disease may not lie in the recesses of the human brain, but rather in the weightless expanses of outer space.
ScienceCasts: Subtracting Gravity from Alzheimer's
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 stands out in previous... Read More
Solar System
Feb 27, 2015
Feb 27, 2015:  Cruising through the asteroid belt, NASA Dawn spacecraft is approaching dwarf planet Ceres, and some puzzling features are coming into focus. "We expected to be surprised by Ceres," says Chris Russell, principal investigator of the Dawn mission, based at UCLA. "We... Read More
Earth, Sun, Solar System
Feb 6, 2015
Feb 6, 2015: Every 13 months, Earth and Jupiter have a close encounter.  Astronomers call it an "opposition" because Jupiter is opposite the Sun in the sky. Our solar system’s largest gas planet rises in the east at sunset, and soars overhead at midnight, shining brighter than any star in the... Read More