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ScienceCasts: Milestones in Review Poster Image
Jan 24, 2017
We’re over 230 episodes in! Which were your favorites? From our home planet to discovering new worlds, find out:
Nov 27, 2013
Nov. 27, 2013:  If you have a smartphone, take it out and run your fingers along the glass surface.  It's cool to the touch, incredibly thin and strong, and almost impervious to scratching.  You're now in contact with a "smart material."
Sun, Solar System
Nov 27, 2013
Nov. 27, 2013: Astronomers have long been puzzled by a certain meteor shower. Every year in mid-December the sky fills with flashes of light shooting out of the constellation Gemini.  The Geminids are fast, bright, and reliable.  They never fail to show up and many observers count... Read More
Solar System
Nov 27, 2013
"Rock Comet" 3200 Phaethon has sprouted a tail, proving that the mysterious object is the source of the annual Geminid meteor shower.
ScienceCasts: Rock Comet Sprouts a Tail
ISS
Nov 25, 2013
Researchers working with magnetic fluids on the International Space Station are taking "smart materials" to the next level. With proper coaxing, molecules can assemble themselves into "genius materials" with surprising properties. This is opening a new frontier in material science.
ScienceCasts: Genius Materials on the ISS
Universe, Sun
Nov 24, 2013
Nov. 24, 2013:  In 2007, astronomers were amazed when a solar storm hit Comet Encke.  NASA STEREO spacecraft watched as a CME (coronal mass ejection) struck the comet head on and ripped off its tail.
Universe, Sun
Nov 16, 2013
Updated Nov. 16, 2013:  Comet ISON is now inside the orbit of Earth as it plunges headlong toward the sun for a fiery close encounter on Nov. 28th.  The comet is putting on a good show for observatories around the solar system, especially after an outburst on Nov. 13-14 that boosted the... Read More
Sun, Solar System
Nov 15, 2013
Nov. 15, 2013:  What are the odds? On Nov. 18th and 19th not one but two comets will fly by the planet Mercury. "This is a unique coincidence," says Ron Vervack an astronomer at the Johns Hopkins University Applied Physics Lab and a member of the science team for NASA's MESSENGER... 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, which shows the view... 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 cozy environment,... 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
Universe
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 Gurnett talking about when he stated at a... Read More
Sun
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 explosions.  If the spots turned... Read More