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Mount St. Helens
On March 8, 2005, Mount St. Helens belched a large cloud of ash and steam, the largest to erupt from the volcano since October 2004. The volcano rumbled back to life in September 2004, and has been restless ever since.…
Cassini Significant Events for 3/03/05 – 03/09/05
Cassini Significant Events for 3/03/05 – 03/09/05 March 15, 2005 (Source: Jet Propulsion Laboratory) Cassini Significant Eventsfor 03/03/05 – 03/09/05 The most recent spacecraft telemetry was acquired today from the Goldstonetracking station. The Cassini spacecraft is in an excellent state…
Fringing Coral Reef, Red Sea
The Sudanese coast of the Red Sea is a well-known destination for diving due to clear water and abundance of coral reefs (or shia’ab in Arabic). Reefs are formed primarily from precipitation of calcium carbonate by corals. (In addition to…
White Sands National Monument
Between the San Andres and Sacramento Mountains in southern New Mexico lies the Tularosa Valley, the southern end of the Rio Grande Rift. The Rio Grande Rift is a desert-dotted basin that extends northward all the way into Colorado, where…
Niagara Falls
A blue-green veil of water tumbles 51 meters over the rocky precipice of the Niagara Falls in this Ikonos image, acquired on August 2, 2004. Every second, more than two million liters of water plummets over the half-circle of the…
Amazonian Drought Experiment
In November 2001, on a plot of land in the Amazon Rainforest in Brazil, an unusual experiment was drawing to a close. To figure out what effects severe droughts have on the rainforest, a team of scientists built an elaborate…
Where on Earth…? MISR Mystery Image Quiz #21
Here’s another chance to play geographical detective! This mystery concerns a particular type of cloud, one example of which was imaged by the Multi-angle Imaging SpectroRadiometer (MISR) in November, 2001. Usually, clouds take their names—cirrus, cumulus, and stratus—from Latin terms…
Cassini Watches Starlight through Enceladus’ Plume
On March 11, 2016, Cassini’s Ultraviolet Imaging Spectrograph (UVIS) will watch as the plume of gas and icy particles from the moon Enceladus passes in front of the central star in Orion’s Belt.
Hubble Weighs in on the Heaviest Stars in the Galaxy
Unlike humans, stars are born with all the weight they will ever have. A human’s birth weight varies by just a few pounds, but a star’s weight ranges from less than a tenth to more than 100 times the mass…
Cyclone Ingrid
Cyclone Ingrid was just below Category-5-strength status when the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this image on March 8, 2005. The storm is steadily bearing down on Australia’s Cape York Peninsula, where residents are under…
Stealing Rain from the Rainforest
In a rainforest, visible effects of drought can be subtle. An experiment that mimicked the impact of a severe El Nino in the Amazon revealed surprising signs of stress that could be seen from space.
A Weak El Niño Getting Weaker
In mid-February, the central, equatorial Pacific Ocean continued to exhibit an area of higher-than-normal sea surface heights centered at 180° West, the International Dateline. This feature contrasted with lower-than-normal sea surface heights in the eastern equatorial Pacific. Sea-surface height corresponds…
Enceladus-1 Flyby
This maps illustrates the region that will be imaged by Cassini during the flyby scheduled this week.
Coastal Change, Amazon River Mouth
Over a period of approximately four years a major island near the mouth of the Amazon River has been dramatically modified as the arms of the river have shifted. Between 2000 and 2005 the channel on the west side of…
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