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Topic: Titan

NASA’s Cassini Spacecraft to start last five orbits around Saturn

 

Written by Felicia Chou
NASA Headquarters

NASA - National Aeronautics and Space AdministrationWashington, D.C. – NASA’s Cassini spacecraft will enter new territory in its final mission phase, the Grand Finale, as it prepares to embark on a set of ultra-close passes through Saturn’s upper atmosphere with its final five orbits around the planet.

Cassini will make the first of these five passes over Saturn at 9:22pm PDT Sunday, August 13th (12:22am EDT Monday, August 14th). The spacecraft’s point of closest approach to Saturn during these passes will be between about 1,010 and 1,060 miles (1,630 and 1,710 kilometers) above Saturn’s cloud tops.

This artist's rendering shows Cassini as the spacecraft makes one of its final five dives through Saturn's upper atmosphere in August and September 2017. (NASA/JPL-Caltech)

This artist’s rendering shows Cassini as the spacecraft makes one of its final five dives through Saturn’s upper atmosphere in August and September 2017. (NASA/JPL-Caltech)

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NASA’s Hubble Space Telescope discovers Exoplanet with Stratosphere

 

Written by Elizabeth Landau
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Scientists have discovered the strongest evidence to date for a stratosphere on a planet outside our solar system, or exoplanet. A stratosphere is a layer of atmosphere in which temperature increases with higher altitudes.

“This result is exciting because it shows that a common trait of most of the atmospheres in our solar system — a warm stratosphere — also can be found in exoplanet atmospheres,” said Mark Marley, study co-author based at NASA’s Ames Research Center in California’s Silicon Valley. “We can now compare processes in exoplanet atmospheres with the same processes that happen under different sets of conditions in our own solar system.”

This artist's concept shows hot Jupiter WASP-121b, which presents the best evidence yet of a stratosphere on an exoplanet. (Engine House VFX, At-Bristol Science Centre, University of Exeter)

This artist’s concept shows hot Jupiter WASP-121b, which presents the best evidence yet of a stratosphere on an exoplanet. (Engine House VFX, At-Bristol Science Centre, University of Exeter)

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NASA’s Voyager Spacecrafts broke new ground during 40 years exploration

 

Written by Elizabeth Landau
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Few missions can match the achievements of NASA’s groundbreaking Voyager 1 and 2 spacecraft during their 40 years of exploration. Here’s a short list of their major accomplishments to date. The Voyager spacecrafts made a lot of planetary firsts

Launched in 1977, the Voyagers delivered many surprises and discoveries from their encounters with the gas giants of the outer solar system: Jupiter, Saturn, Uranus and Neptune.

This montage of images of the planets visited by Voyager 2 was prepared from an assemblage of images taken by the 2 Voyager spacecraft. (NASA/JPL)

This montage of images of the planets visited by Voyager 2 was prepared from an assemblage of images taken by the 2 Voyager spacecraft. (NASA/JPL)

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NASA’s Voyager Spacecrafts continue exploration after 40 Years

 

Written by Elizabeth Landau / Jia-Rui Cook
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Humanity’s farthest and longest-lived spacecraft, Voyager 1 and 2, achieve 40 years of operation and exploration this August and September. Despite their vast distance, they continue to communicate with NASA daily, still probing the final frontier.

Their story has not only impacted generations of current and future scientists and engineers, but also Earth’s culture, including film, art and music. Each spacecraft carries a Golden Record of Earth sounds, pictures and messages. Since the spacecraft could last billions of years, these circular time capsules could one day be the only traces of human civilization.

An artist concept depicting one of the twin Voyager spacecraft. Humanity's farthest and longest-lived spacecraft are celebrating 40 years in August and September 2017. (NASA/JPL-Caltech)

An artist concept depicting one of the twin Voyager spacecraft. Humanity’s farthest and longest-lived spacecraft are celebrating 40 years in August and September 2017. (NASA/JPL-Caltech)

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Tennessee Joins Alabama, Florida, Georgia, South Carolina for “Operation Southern Shield”

 

Clarksville Police Department will be taking part in “Operation Southern Shield”

Governor’s Highway Safety OfficeNashville, TN – Today, July 17th, 2017, the Tennessee Highway Safety Office (THSO) was joined by the National Highway Traffic Safety Administration (NHTSA), the Georgia Governor’s Office of Highway Safety, and law enforcement partners for a press event to launch “Operation Southern Shield,” a regional mobilization to crack down on speeding from July 17th to July 23rd, 2017.

The Clarksville Police Department will be joining in this effort and providing increased presence on US-41A (Madison Street, 41-A bypass, Providence Boulevard, Fort Campbell Boulevard, and Riverside Drive.

“Operation Southern Shield” to Increase Speed Enforcement Across the Southeast.

“Operation Southern Shield” to Increase Speed Enforcement Across the Southeast.

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NASA’s Cassini Spacecraft observes Saturn’s Solstice

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s Cassini spacecraft still has a few months to go before it completes its mission in September, but the veteran Saturn explorer reaches a new milestone today. Saturn’s solstice — that is, the longest day of summer in the northern hemisphere and the shortest day of winter in the southern hemisphere — arrives today for the planet and its moons.

The Saturnian solstice occurs about every 15 Earth years as the planet and its entourage slowly orbit the sun, with the north and south hemispheres alternating their roles as the summer and winter poles.

These natural color views from Cassini show how the color of Saturn's north-polar region changed between June 2013 and April 2017, as the northern hemisphere headed toward summer solstice. (NASA/JPL-Caltech/SSI/Hampton Univ.)

These natural color views from Cassini show how the color of Saturn’s north-polar region changed between June 2013 and April 2017, as the northern hemisphere headed toward summer solstice. (NASA/JPL-Caltech/SSI/Hampton Univ.)

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NASA’s Cassini spacecraft finishes last close orbit of Saturn’s moon Titan

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s Cassini spacecraft has had its last close brush with Saturn’s hazy moon Titan and is now beginning its final set of 22 orbits around the ringed planet.

The spacecraft made its 127th and final close approach to Titan on April 21st at 11:08pm PDT (1:08am CDT on April 22nd), passing at an altitude of about 608 miles (979 kilometers) above the moon’s surface.

Cassini transmitted its images and other data to Earth following the encounter.

This unprocessed image of Saturn's moon Titan was captured by NASA's Cassini spacecraft during its final close flyby of the hazy, planet-sized moon on April 21, 2017. (NASA/JPL-Caltech/Space Science Institute)

This unprocessed image of Saturn’s moon Titan was captured by NASA’s Cassini spacecraft during its final close flyby of the hazy, planet-sized moon on April 21, 2017. (NASA/JPL-Caltech/Space Science Institute)

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NASA’s Cassini spacecraft begins last close flyby of Saturn’s moon Titan

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s Cassini spacecraft will make its final close flyby of Saturn’s haze-enshrouded moon Titan this weekend.

The flyby marks the mission’s final opportunity for up-close observations of the lakes and seas of liquid hydrocarbons that spread across the moon’s northern polar region, and the last chance to use its powerful radar to pierce the haze and make detailed images of the surface.

Closest approach to Titan is planned for 11:08pm PDT on April 21st (2:08am EDT April 22nd). During the encounter, Cassini will pass as close as 608 miles (979 kilometers) above Titan’s surface at a speed of about 13,000 mph (21,000 kph).

Cassini will make its final close flyby of Saturn's moon Titan on April 21st (PDT), using its radar to reveal the moon's surface lakes and seas one last time. (NASA/JPL-Caltech)

Cassini will make its final close flyby of Saturn’s moon Titan on April 21st (PDT), using its radar to reveal the moon’s surface lakes and seas one last time. (NASA/JPL-Caltech)

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NASA’s Cassini mission and Hubble Space Telescope provides new details about moons Enceladus and Europa

 

Written by Felicia Chou
NASA Headquarters

NASA - National Aeronautics and Space AdministrationWashington, D.C. – Two veteran NASA missions are providing new details about icy, ocean-bearing moons of Jupiter and Saturn, further heightening the scientific interest of these and other “ocean worlds” in our solar system and beyond. The findings are presented in papers published Thursday by researchers with NASA’s Cassini mission to Saturn and Hubble Space Telescope.

In the papers, Cassini scientists announce that a form of chemical energy that life can feed on appears to exist on Saturn’s moon Enceladus, and Hubble researchers report additional evidence of plumes erupting from Jupiter’s moon Europa.

This artist's rendering shows Cassini diving through the Enceladus plume in 2015. New ocean world discoveries from Cassini and Hubble will help inform future exploration and the broader search for life beyond Earth. (NASA/JPL-Caltech)

This artist’s rendering shows Cassini diving through the Enceladus plume in 2015. New ocean world discoveries from Cassini and Hubble will help inform future exploration and the broader search for life beyond Earth. (NASA/JPL-Caltech)

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NASA’s Cassini spacecraft to begin final orbits around Saturn

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – NASA’s Cassini spacecraft, in orbit around Saturn since 2004, is about to begin the final chapter of its remarkable story. On Wednesday, April 26th, the spacecraft will make the first in a series of dives through the 1,500-mile-wide (2,400-kilometer) gap between Saturn and its rings as part of the mission’s grand finale.

“No spacecraft has ever gone through the unique region that we’ll attempt to boldly cross 22 times,” said Thomas Zurbuchen, associate administrator for the Science Mission Directorate at NASA Headquarters in Washington. “What we learn from Cassini’s daring final orbits will further our understanding of how giant planets, and planetary systems everywhere, form and evolve. This is truly discovery in action to the very end.”

This illustration shows Cassini above Saturn's northern hemisphere prior to one of its 22 Grand Finale dives. (NASA/JPL-Caltech)

This illustration shows Cassini above Saturn’s northern hemisphere prior to one of its 22 Grand Finale dives. (NASA/JPL-Caltech)

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