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Hubble’s Contentious Constant Poster
Universe
Sep 20, 2017
There are two leading ways to measure the universe's rate of expansion, and for fifteen years, they more or less agreed with one another. Not anymore, and that’s a big deal.
Universe
Jan 30, 2014
Jan. 30, 2014:   Everyone knows that space is cold. In the vast gulf between stars and galaxies, the temperature of gaseous matter routinely drops to 3 degrees K, or 454 degrees below zero Fahrenheit. It’s about to get even colder. NASA researchers are planning to create the... Read More
Universe, ISS
Jan 30, 2014
NASA researchers plan to create the coldest spot in the known Universe--inside the International Space Station. The device, known as the Cold Atom Lab, could discover new forms of matter and novel quantum phenomena.
ScienceCasts: The Coolest Spot in the Universe
Earth, Solar System
Jan 22, 2014
Jan. 22, 2014:  Scientists using the Herschel space observatory have made the first definitive detection of water vapor on the largest and roundest object in the asteroid belt, dwarf planet Ceres. "This is the first time water vapor has been unequivocally... Read More
Earth
Jan 21, 2014
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. With the exception of 1998, the 10 warmest years in the 134-year record all have occurred since 2000, with... Read More
Solar System
Jan 17, 2014
The New Year started off with a bang when a small asteroid hit Earth. Infrasound records indicate that the space rock exploded in the atmosphere over the Atlantic Ocean like 500 tons of TNT.
ScienceCasts: New Years Asteroid Strike
Solar System
Jan 14, 2014
Jan. 14, 2014:  Are we there yet? One of the fastest spacecraft ever built -- NASA's New Horizons -- is hurtling through the void at nearly one million miles per day.  Launched in 2006, it has been in flight longer than some missions last, and it is nearing... Read More
Solar System
Jan 13, 2014
Eight years after it left Earth, NASA's New Horizons spacecraft is approaching Pluto. The encounter begins less than a year from now.
ScienceCasts: Countdown to Pluto
Jan 10, 2014
Earth
Jan 10, 2014
Jan. 10, 2014:  When firefighters want to extinguish a blaze, they often douse it with water. Astronauts on board the ISS, however, are experimenting with a form of water that does the opposite.  Instead of stopping fire, this water helps start it. "We... Read More
Earth
Jan 8, 2014
Jan. 8, 2014:  A new NASA satellite that will peer into the topmost layer of Earth's soils to measure the hidden waters that influence our weather and climate is in final preparations for a Jan. 29 dawn launch from California.
ISS
Jan 3, 2014
Astronauts on the ISS are experimenting with a form of water that has a strange property: it can help start fire. This fundamental physics investigation could have down-to-Earth benefits such as clean-burning municipal waste disposal and improved saltwater purification.
ScienceCasts: Starting Fire in Water
Earth, Sun
Dec 23, 2013
Dec. 23, 2013:  Data from NASA's AIM spacecraft show that noctilucent clouds are like a great "geophysical light bulb." They turn on every year in late spring, reaching almost full intensity over a period of no more than 5 to 10 days. News flash: The bulb is... Read More
Sun
Dec 19, 2013
A vast bank of electric-blue clouds has appeared over Antarctica, signaling the start of the season for southern hemisphere noctilucent clouds.
ScienceCasts: Electric-Blue Clouds Appear Over Antarctica