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Cassini's Grand Finale Poster
Solar System, Planets of Our Solar System
Aug 15, 2017
Cassini is in the process of executing 22 daring ‘Grand Finale’ dives in the 1,200-mile gap between Saturn and its innermost ring, concluding with an epic final plunge into the gas giant’s upper atmosphere.
Universe, Solar System
Apr 17, 2014
April 17, 2014: Using NASA's Kepler Space Telescope, astronomers have discovered the first Earth-size planet orbiting in the "habitable zone" of another star. The planet, named "Kepler-186f" orbits an M dwarf, or red dwarf, a class of stars that makes up 70 percent of the stars... Read More
Apr 16, 2014
April 16, 2014: Earth's poles are separated by four oceans, six continents and more than 12,000 nautical miles. Turns out, that's not so far apart. New data from NASA's AIM spacecraft have revealed "teleconnections" in Earth's atmosphere that stretch all... Read More
Solar System
Apr 14, 2014
April 14, 2014: NASA's Cassini spacecraft has documented the formation of a small icy object within the rings of Saturn. Informally named "Peggy," the object may be a new moon. Details of the observations were published online today by the journal Icarus.
Apr 11, 2014
NASA's AIM spacecraft is discovering unexpected "teleconnections" in Earth's atmosphere that link weather and climate across vast distances.
ScienceCasts: Unexpected Teleconnections in Noctilucent Clouds
Apr 10, 2014
April 10, 2014:  Consider a pair of brothers, identical twins.  One gets a job as an astronaut and rockets into space.  The other gets a job as an astronaut, too, but on this occasion he decides to stay home.  After a year in space, the traveling twin returns... Read More
Apr 7, 2014
Next year, with the assistance of the world's only twin astronauts, NASA will conduct an unprecedented experiment in human biology. While one twin remains on the ground, the other will circle Earth onboard the International Space Station for a full year. Will the twins still be identical when... Read More
ScienceCasts: Unexpected Teleconnections in Noctilucent Clouds
Solar System
Apr 3, 2014
April 3, 2014:  NASA's Cassini spacecraft and Deep Space Network have uncovered evidence that Saturn's moon Enceladus harbors a large underground ocean, furthering scientific interest in the moon as a potential home to extraterrestrial microbes.
Apr 1, 2014
April 1, 2014:  A new study by researchers from the National Snow and Ice Data Center (NSIDC) and NASA shows that the length of the melt season for Arctic sea ice is growing by several days each decade. An earlier start to the melt season is allowing the Arctic Ocean to... Read More
Sun, Solar System
Mar 28, 2014
March 28, 2014:  By the time you finish reading this story, you'll be about 1,000 km closer to the planet Mars. Earth and Mars are converging for a close encounter. As March gives way to April, the distance between the two planets is shrinking by about 300 km... Read More
Sun, Solar System
Mar 27, 2014
March 27, 2014:  For people in the United States, an extraordinary series of lunar eclipses is about to begin.
Solar System
Mar 27, 2014
Earth and Mars are converging for a close encounter in April, an event astronomers call "the opposition of Mars."
ScienceCasts: The Opposition of Mars
Solar System
Mar 20, 2014
A total lunar eclipse on April 15th marks the beginning of a remarkable series of eclipses all visible from North America.
ScienceCasts: A Tetrad of Lunar Eclipses
Mar 7, 2014
March 7, 2014:  More than 400 years ago, Galileo turned a primitive spyglass toward the sky, and in just a few nights learned more about the unseen heavens than all of the scientists and philosophers before him, combined.
Mar 6, 2014
March 6, 2014: NASA's Hubble Space Telescope has recorded the never-before-seen break-up of an asteroid into as many as 10 smaller pieces. Fragile comets, comprised of ice and dust, have been seen falling apart as they approach the sun, but nothing like this has ever before been... Read More