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A Display of Lights Above the Storm Poster
Oct 10, 2017
Transient Luminous Events (TLEs) are flashes and glows that appear above storms and are results of activity occurring in and below those storms. Researchers are working to better understand lightning and thunderstorms, how they form and develop over time, and why storms produce different TLEs in... Read More
Solar System
Nov 14, 2013
Consider it a cosmic coincidence: On Nov. 18-19, two comets (ISON and Encke) are going to fly by the planet Mercury in quick succession. NASA's MESSENGER spacecraft will have a front-row seat for the rare double flyby.
ScienceCasts: Two Comets to Fly By Mercury on Nov 18 and 19
Earth, Solar System
Nov 12, 2013
Nov. 12, 2013:  NASA has released a natural-color image of Saturn from space, the first in which Saturn, its moons and rings, and Earth, Venus and Mars, all are visible. The new panoramic mosaic of the majestic Saturn system taken by NASA's Cassini spacecraft,... Read More
Sun, Solar System
Nov 12, 2013
Nov. 12, 2013:  Billions of years ago when the planets of our solar system were still young, Mars was a very different world.  Liquid water flowed in long rivers that emptied into lakes and shallow seas. A thick atmosphere blanketed the planet and kept it warm. In this... Read More
Solar System
Nov 8, 2013
Mars was once on track to become a thriving Earth-like planet, yet today it is an apparently lifeless wasteland. A NASA spacecraft named MAVEN will soon journey to Mars to find out what went wrong on the Red Planet.
ScienceCasts: What Happened to Mars? A Planetary Mystery
Nov 7, 2013
Nov. 7, 2013:  Astronomers viewing our solar system's asteroid belt with NASA's Hubble Space Telescope have seen for the first time an asteroid with six comet-like tails of dust. Designated P/2013 P5, the asteroid resembles a rotating lawn sprinkler.
Sun, Solar System
Nov 1, 2013
Nov. 1, 2013:  Scifi movies are sometimes criticized when explosions in the void make noise.  As the old saying goes, “in space, no one can hear you scream.” Without air there is no sound. But if that’s true, what was space physicist Don... Read More
Oct 31, 2013
Oct. 31, 2013:  Some Halloweens are scarier than others. Ten years ago, in late October 2003, space weather forecasters experienced a frission of dread when two gigantic sunspots appeared. Both had complex magnetic fields that harbored energy for strong... Read More
Oct 31, 2013
As Voyager 1 recedes from the solar system, researchers are listening for "interstellar music" (a.k.a. plasma waves) to learn more about conditions outside the heliosphere.
ScienceCasts: The Sounds of Interstellar Space
Earth, Sun
Oct 25, 2013
Oct. 25, 2013:  The next time you step onto an airplane, consider the following:  In any given year, the pilot of your aircraft probably absorbs as much radiation as a worker in a nuclear power plant.  And you are about to follow him wherever he goes... Read More
Oct 24, 2013
Astronauts aren't the only ones who need to worry about solar flares. Ordinary air travelers can also be exposed to significant doses of radiation during solar storms. A new computer model developed by NASA aims to help protect the public by predicting space weather hazards to aviation.
ScienceCasts: The Effects of Space Weather on Aviation
Solar System
Sep 24, 2013
Sept. 24, 2013:  Anticipation is building as Comet ISON approaches the sun for a close encounter on Thanksgiving Day (Nov. 28). No one knows if the blast of solar heating ISON receives will turn it into one of the finest comets in years--or destroy the icy visitor from the... Read More
Solar System
Sep 23, 2013
Comet ISON is still more than two months away from its spectacular close encounter with the sun. Already, the brightening comet has become a good target for backyard telescopes in the pre-dawn sky.
ScienceCasts: Amateur Astonomers See Comet ISON Approaching the Sun
Sun, Solar System
Sep 16, 2013
Sept. 16, 2013:  According to folklore, every full Moon has a special name.  There's the Wolf Moon, the Snow Moon, the Worm Moon,  the Sprouting Grass Moon,  the Flower Moon,  the Strawberry Moon, the Thunder Moon,  the Sturgeon Moon, the Harvest... Read More
Solar System
Sep 15, 2013
The full Moon closest to the northern autumnal equinox is coming this week. Don't miss the Harvest Moon.
ScienceCasts: The Harvest Moon