NASA 2017-05-18 22:29:59

Shrouded in clouds today in 1969, this image was taken by the crew of Apollo 10 as they began their lunar journey. From 36,000 nautical miles away, this full disk view of our home planet shows the crew’s vantage point from space.

The crew members on Apollo 10 were astronauts Thomas P. Stafford, commander; John W. Young, command module pilot; and Eugene E. Cernan, lunar module pilot. Astronaut Young remained in lunar orbit, in the Command and Service Module (CSM) “Charlie Brown”, while astronauts Stafford and Cernan descended to within nine miles of the lunar surface, in the Lunar Module (LM) “Snoopy”. Credit: NASA

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NASA 2016-06-13 04:21:07

Beams of Light on a Golden Lake: This stunning Earth image taken by the International Space Station crew on May 31, 2016 looks from northwestern China on the bottom into eastern Kazakhstan. The large lake in Kazakhstan with golden sun glint is the crescent-shaped Lake Balkhash, the second largest lake in Central Asia. Lake Balkhash sits in the Balkhash-Alakol depression in southeastern Kazakhstan and stretches over 7,115 square miles (18,428 sq. km). Image Credit: NASA
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NASA 2014-03-10 01:06:10

As seen on #Cosmos tonight: A ‘Blue Marble’ image of the Earth taken from the VIIRS instrument aboard NASA’s most recently launched Earth-observing satellite – Suomi NPP. This composite image uses a number of swaths of the Earth’s surface taken on January 4, 2012.

Suomi NPP is NASA’s next Earth-observing research satellite. It is the first of a new generation of satellites that will observe many facets of our changing Earth.

Credit: NASA/NOAA/GSFC/Suomi NPP/VIIRS/Norman Kuring
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NASA 2013-10-20 15:10:44

Earth — as seen by the Juno spacecraft flying by our home planet on October 9, 2013: In this image of Earth taken by JunoCam, you can see observations made during Juno’s Earth flyby gravity assist that was completed earlier this month. Several Juno science instruments made planned observations during the approach to Earth, including the Advanced Stellar Compass, JunoCam and Waves. These observations provided a useful opportunity to test the instruments during a close planetary encounter and ensure that they work as designed. The main goal of the flyby – to give the spacecraft the boost it needed in order to reach Jupiter – was accomplished successfully.

The Juno spacecraft was launched from Kennedy Space Center on August 5, 2011 toward Jupiter. Juno’s rocket, the Atlas 551, was only capable of giving Juno enough energy or speed to reach the asteroid belt, at which point the Sun’s gravity pulled Juno back toward the inner solar system. The Earth flyby gravity assist was planned as part of Juno’s trajectory to increase the spacecraft’s speed relative to the Sun so that it is sufficient to reach Jupiter. (The spacecraft’s speed relative to Earth remains constant.) Because of the flyby, Juno’s velocity relative to the Sun increases from 78,000 miles (126,000 kilometers) per hour to 87,000 miles (140,000 kilometers) per hour. Juno is moving much faster than satellites that orbit the Earth because Juno is orbiting the Sun, not Earth.

As of Oct. 17, Juno was approximately 4.4 million miles (7.1 million kilometers) from Earth. The one-way radio signal travel time between Earth and Juno is currently about 24 seconds. Juno has now traveled 1.01 billion miles (1.63 billion kilometers, or 10.9 AU) since launch. With the Earth flyby completed, Juno is now on course for arrival at Jupiter on July 4, 2016.

Image credit: NASA/JPL-Caltech/Malin Space Science Systems

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