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The Ten Most Popular Goddard Multimedia Items on svs.gsfc.nasa.gov in the Past Week

Other Popular Items on svs.gsfc.nasa.gov:
 
In its first year of operations, NASA’s Fermi Gamma-ray Space Telescope has mapped the entire sky with unprecedented resolution and sensitivity in gamma-rays, the highest-energy form of light. On May 10, 2009 a pair of gamma-ray photons reached Fermi only 900 milliseconds apart after traveling for 7 billion years. Fermi’s measurement gives us rare experimental evidence that space-time is smooth as Einstein predicted, and has shut the door on several approaches to gravity where space-time is foamy enough to interfere strongly with light.For complete transcript, click here.
Einstein's Cosmic Speed Limit
Number of hits: 53532
 
How will climate change impact agriculture? This episode explores the need for accurate, continuous and accessible data and computer models to track and predict the challenges farmers face as they adjust to a changing climate.For complete transcript, click here.
Science for a Hungry World: Agriculture and Climate Change
Number of hits: 31248
 
One of the biggest changes to global agriculture is less about the food itself as it is about the water we use to grow it. In some areas, farmers are using freshwater resources - including groundwater - at an alarming rate. The GRACE satellites enable scientists to discover changes to underground aquifers by monitoring changes in the Earth's gravity. In northern India, farmers rely heavily on irrigation to grow crops, and the resulting massive aquifer depletion creates an uncertain future for the region. For complete transcript, click here.
Science for a Hungry World: Growing Water Problems
Number of hits: 26204
 
Celebrating its 50th Anniversary in 2009, Goddard Space Flight Center has seen a lot of changes over its first five decades. Yet at the same time, the core values and mission of the center has changed little. This vintage film from 1976 shows a time-capsule glimpse of GSFC's early foundations and how remarkably similar they are to today. For complete transcript, click here.
Goddard Space Flight Center (1976)
Number of hits: 20695
 
Carbon is all around us. This unique atom is the basic building block of life, and its compounds form solids, liquids, or gases. Carbon helps form the bodies of living organisms; it dissolves in the ocean; mixes in the atmosphere; and can be stored in the crust of the planet. A carbon atom could spend millions of years moving through this complex cycle. The ocean plays the most critical role in regulating Earth's carbon balance, and understanding how the carbon cycle is changing is key to understanding Earth's changing climate. For complete transcript, click here.
Keeping Up With Carbon
Number of hits: 19528
 
Sponsored by USAID, the Famine Early Warning System Network (FEWS NET) was designed to help governments and aid agencies assess the need for food aid before a famine develops. This episode describes FEWS NET and looks at how FEWS NET uses NASA data to make decisions on the ground.For complete transcript, click here.
Science for a Hungry World: Food Security
Number of hits: 17418
 
Water is all around us, and its importance to nearly every natural process on earth cannot be underestimated. The water cycle is the movement of water around the Earth in all its forms, from the ocean to the atmosphere, to snow, soil, aquifers, lakes, and streams on land, and ultimately backs to the ocean. This video explains what the water cycle is and how important it is to life on earth.For complete transcript, click here.
Water, Water Everywhere!
Number of hits: 17370
 
One tiny marine plant makes life on Earth possible: phytoplankton. These microscopic photosynthetic drifters form the basis of the marine food web, they regulate carbon in the atmosphere, and are responsible for half of the photosynthesis that takes place on this planet. Earth's climate is changing at an unprecedented rate, and as our home planet warms, so does the ocean. Warming waters have big consequences for phytoplankton and for the planet. For complete transcript, click here.
The Ocean's Green Machines
Number of hits: 16989
 
Salinity plays a major role in how ocean waters circulate around the globe. Salinity changes can create ocean circulation changes that, in turn, may impact regional and global climates. The extent to which salinity impacts our global ocean circulation is still relatively unknown, but NASA's new Aquarius mission will help advance that understanding by painting a global picture of our planet's salty waters.For complete transcript, click here.
Salt of the Earth
Number of hits: 15538
 
Sea level rise is an indicator that our planet is warming. Much of the world's population lives on or near the coast, and rising seas are something worth watching. Sea level can rise for two reasons, both linked to a warming planet. When ice on land, such as mountain glaciers or the ice sheets of Greenland or Antarctica, melt, that water contributes to sea level rise. And when our oceans get warmer - another indicator of climate change - the water expands, also making sea level higher. Using satellites, lasers, and radar in space, and dedicated researchers on the ground, NASA is studying the Earth's ice and water to better understand how sea level rise might affect us all.For complete transcript, click here.
Melting Ice, Rising Seas
Number of hits: 14547

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