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Significant Event Report for Week Ending 5/21/1999
Cassini Significant Event Report For Week Ending 05/21/99 Spacecraft Status: The most recent spacecraft status is from the DSN tracking pass on Thursday, 05/20, over the Canberra tracking station. The Cassini spacecraft is in an excellent state of health and…
Population Density
This dataset shows the number of people per square kilometer around the world in 1994. The data were derived from population records based on political divisions such as states, provinces, and counties. Because theresolution of the data from different nations…
Colossal Cyclone Swirls near Martian North Pole
Astronomers using NASA’s Hubble Space Telescope have discovered an enormous cyclonic storm system raging in the northern polar regions of the planet Mars. Nearly four times the size of the state of Texas, the storm is composed of water ice…
Significant Event Report for Week Ending 5/14/1999
Cassini Significant Event Report For Week Ending 05/14/99 Spacecraft Status: The most recent spacecraft status is from the DSN tracking pass on Thursday, 05/13, over the Canberra tracking station. The Cassini spacecraft is in an excellent state of health and…
Changing Global Cloudiness
Clouds are one of the most obvious and influential features of Earth’s climate system. They are also one of its most variable components. The natural diversity and variability of clouds has intrigued and challenged researchers for centuries.
Florida Fires, April 1999
Florida is experiencing another series of fires this spring, the result of months of low rainfall. This Sea-viewing Wide Field of View Sensor (SeaWiFS) image, taken on April 19, 1999, shows two smoke plumes in the north of the state,…
Natural Lenses in Space Stretch Hubble’s View of the Universe
The NASA Hubble Space Telescope serendipitous survey of the sky has uncovered exotic patterns, rings, arcs and crosses that are all optical mirages produced by a gravitational lens, nature’s equivalent of having giant magnifying glass in space.A gravitational lens is…
Significant Event Report for Week Ending 5/7/1999
Cassini Significant Event Report For Week Ending 05/07/99 Spacecraft Status: The most recent spacecraft status is from the DSN tracking pass on Thursday, 05/06, over the Canberra tracking station. The Cassini spacecraft is in an excellent state of health and…
Oklahoma Tornadoes
Tornadoes in Oklahoma and Kansas on May 3, 1999, killed at least 40 people and caused over 500 million dollars in damages. One of the tornadoes was an F-5, the largest and most powerful classification. Although no direct measurement of…
Internet Voters Get Two Galaxies in One from Hubble
Space Telescope Science Institute astronomers are giving the public chances to decide where to aim NASA’s Hubble Space Telescope. Guided by 8,000 Internet voters, Hubble was already used to take a close-up, multi-color picture of the most popular object from…
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Descobertas, missões espaciais, pesquisas e avanços tecnológicos da agência espacial americana.