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Archive for September, 2017

September 3, 2017

Hazy Ring

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NASA dixit:

“January 30, 2012. The Cassini spacecraft looks toward the dark side of Saturn’s largest moon and captures the halo-like ring produced by sunlight scattering through the periphery of Titan’s atmosphere. A detached, high-altitude global haze layer encircles Titan. See Titan’s Halo to learn more. This view looks toward the Saturn-facing side of Titan (3,200 miles, or 5,150 kilometers across). North on Titan is up and rotated 29 degrees to the left.

The image was taken in visible green light with the Cassini spacecraft wide-angle camera. The view was obtained at a distance of approximately 123,000 miles (197,000 kilometers) from Titan and at a Sun-Titan-spacecraft, or phase, angle of 162 degrees. Image scale is 7 miles (12 kilometers) per pixel.”

“After almost 20 years in space, NASA’s Cassini spacecraft begins the final chapter of its remarkable story of exploration: its Grand Finale. Between April and September 2017, Cassini will undertake a daring set of orbits that is, in many ways, like a whole new mission. Following a final close flyby of Saturn’s moon Titan, Cassini will leap over the planet’s icy rings and begin a series of 22 weekly dives between the planet and the rings.

No other mission has ever explored this unique region. What we learn from these final orbits will help to improve our understanding of how giant planets – and planetary systems everywhere – form and evolve.

On the final orbit, Cassini will plunge into Saturn’s atmosphere, sending back new and unique science to the very end. After losing contact with Earth, the spacecraft will burn up like a meteor, becoming part of the planet itself.

Cassini’s Grand Finale is about so much more than the spacecraft’s final dive into Saturn. That dramatic event is the capstone of six months of daring exploration and scientific discovery. And those six months are the thrilling final chapter in a historic 20-year journey.”

Image credit: NASA

 

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September 2, 2017

Atlas V TDRS-M Rocket Cam

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Wikipedia dixit:

“TDRS-M, to be renamed TDRS-13 upon entry into service, is an American communications satellite operated by NASA as part of the Tracking and Data Relay Satellite System. The thirteenth Tracking and Data Relay Satellite, it is the third and final third-generation spacecraft to be launched, following the 2014 launch of TDRS-L.

TDRS-M was constructed by Boeing, based on the BSS-601HP satellite bus. Fully fueled, it has a mass of 3,454 kg (7,615 lb), with a design life of 15 years. It carries two steerable antennas capable of providing S, Ku and Ka band communications for other spacecraft, with an additional array of S-band transponders for lower-rate communications with five further satellites. The satellite is powered by two solar arrays, which produce 2.8 to 3.2 kilowatts of power, while an R-4D-11-300 engine is present to provide propulsion.”

Video credit: ULA

 

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