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NASA Embraces Small Satellites Poster
Earth, Sun
Mar 20, 2017
NASA is embracing small satellite designs, from tiny CubeSats to micro-satellites. These miniature marvels are providing many ways to collect science data and to demonstrate new technologies.
Solar System
Dec 12, 2013
The Geminid meteor shower is underway. Forecasters say the best time to look is during the dark hours before sunrise on Saturday morning, Dec. 14th. Dark-sky observers could see dozens of bright shooting stars.
ScienceCasts: Geminid Meteors at Dawn
Earth
Dec 10, 2013
Dec. 10, 2013:  What is the coldest place on Earth? It is a high ridge in Antarctica on the East Antarctic Plateau where temperatures in several hollows can dip below minus 133.6 degrees Fahrenheit (minus 92 degrees Celsius) on a clear winter night.
Universe, Sun
Dec 4, 2013
Dec. 4, 2013:  Astronomers have long known that some comets like it hot.  Several of the greatest comets in history have flown close to the sun, puffing themselves up with solar heat, before they became naked-eye wonders in the night sky. Some comets like... Read More
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... 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-... 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... 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