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Subtle Signs of Recovery in Lake Mead
In the western United States, water is the most critical natural resource. In addition todrinking supplies, water sustains agriculture, provides hydroelectric power, and nourishes ecosystems. The artificial Lake Powell and Lake Mead reservoirs on the Colorado River are the most…
Colorado Snow Extent
High and dry, Colorado depends on spring snowfall in the Rocky Mountains to provide much of the state’s water. The spring of 2005 has been kind to the area, bringing a healthier dose of snowfall than did the spring of…
Fires in Quebec, Canada
According to news reports from the Montreal Gazette, more than 80 lightning-triggered fires were burning across Quebec province in Canada on June 2, 2005. As many as 18 of the fires were burning out of control. Throughout the region, hundreds…
Cassini Significant Events — for 05/26/05 – 05/31/05
Cassini Significant Events — for 05/26/05 – 05/31/05 June 3, 2005 (Source: Cassini Project) The most recent spacecraft telemetry was acquired Tuesday from the Goldstonetracking station. The Cassini spacecraft is in an excellent state of healthand is operating normally. Information…
NASA’s Space Eyes Focus on Deep Impact Target
On July 4, NASA’s Deep Impact spacecraft will attempt an extraordinarily daring encounter with the far-flung comet Tempel 1 hurtling through space at tens of thousands of miles per hour. As if that is not challenging enough, the comet’s size,…
Brattahlid, Norse Greenland
Naming an island that’s 90 percent ice-covered “Greenland” may seem ironic, but the Norse settlers who arrived in AD 985 found a few pockets of vegetation amid the barren rock and snow. Most of these settlements were near the southern…
Fires in Central Africa
Each year, thousands of fires burn across southern Africa beginning in May and ending in late August or early September. Between February and March, rainfall begins to shift from the savannas of southern Africa to areas north of the tropical…
Malosmadulu Atolls, Maldives
North and South Malosmadulu Atolls are in the Maldives, an island republic in the northern Indian Ocean, southwest of India. Arguably the lowest-lying country in the world, the average elevation is just 1 meter above sea level.
Tarbela Dam, Pakistan
The Indus River basin extends from the Himalaya Mountains that form the northeastern boundary of Pakistan to the alluvial plains of Sindh near the Arabian Sea coastline. Tarbela Dam is part of the Indus Basin Project, which resulted from a…
Deforestation around the Panama Canal
Completed in 1914, the Panama Canal has saved every ship passing throughit a 7,872-mile trip around South America. Now, each ship takes a 51-milejourney through an intricate system of gates, locks, and drains. A singletrip through the canal requires 52…
Unusual Activity during the Solar Minimum
On January 20, 2005, a massive solar flare erupted on the surface of the Sun, sending extremely high-energy particles streaming toward Earth. Protons and neutrons measured by satellites and Earth-based instruments showed the flare to be the strongest in at…
Thawing Ice on Hudson Bay
With the coming of spring, the ice on Canada’s Hudson Bay has begun to break up. Large chunks of ice float near the eastern shore of the bay, while to the west, the center of the bay remains frozen. In…
Cassini Significant Events — 05/19/05 – 05/25/05
Cassini Significant Events — 05/19/05 – 05/25/05 May 27, 2005 (Source: Cassini Project) The most recent spacecraft telemetry was acquired Wednesday from theGoldstone tracking station. The Cassini spacecraft is in an excellent stateof health and is operating normally. Information on…
Atmospheric Gravity Waves over Arabian Sea
When the Sun reflects off the surface of the ocean at the same angle that a satellite sensor is viewing the surface, a phenomenon called sunglint occurs. In the sunglint area of a satellite image, smooth ocean water becomes a…
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Descobertas, missões espaciais, pesquisas e avanços tecnológicos da agência espacial americana.