Jan. 21, 2014
NASA scientists say 2013 tied with 2009 and 2006 for the seventh warmest year since 1880, continuing a long-term trend of rising global temperatures.
Jan. 14, 2014
Eight years after it left Earth, NASA's New Horizons spacecraft is approaching Pluto. The encounter begins less than a year from now.
Dec. 23, 2013
A vast bank of electric-blue clouds has appeared over Antarctica, signaling the start of the season for southern hemisphere noctilucent clouds.
Dec. 13, 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.
Dec. 10, 2013
Earth-orbiting satellites have found the coldest place on Earth. No surprise: It's in Antarctica. The coldest of the cold temperatures dropped to minus 135.8 F (minus 93.2 C) -- several degrees below the previous record.
Dec. 4, 2013
In full view of the NASA-ESA solar physics fleet, Comet ISON disintegrated when it flew through the sun's atmosphere on Thanksgiving Day. Researchers are still marveling at the images and the scientific data they contain.
Nov. 27, 2013
"Rock comet" 3200 Phaethon has sprouted a tail, confirming that the mysterious object is the source of the annual Geminid meteor shower.
Nov. 27, 2013
Researchers working with magnetic fluids on the International Space Station are taking "smart materials" to the next level. With proper coaxing, molecules in microgravity can assemble themselves into "genius materials" with surprising properties. This is opening a new frontier in material science.
Nov. 24, 2013
On Nov. 28th. Comet ISON will have a perilous close encounter with the Sun. In today's story from Science@NASA, experts discuss what might happen if the comet gets hit by a solar storm at point-blank range.
Nov. 15, 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.