Astronauts Andrew Morgan of NASA and Luca Parmitano of the European Space Agency are taking a 6.5-hour spacewalk outside the International Space Station to continue repairs on the orbiting lab's $2 billion Alpha Magnetic Spectrometer experiment. You can watch it live above.
Space.comBy Staff
© | Astronauts Taking Repair Spacewalk Outside Space Station
The spacewalk began at about 6:50 a.m. EST (1150 GMT) and is the third in a series of four repair spacewalks for the AMS instrument, which is a cosmic ray detector designed to seek out the dark matter and other elusive cosmic objects.
Alpha Magnetic Spectrometer repair spacewalk. Astronauts Andrew Morgan of NASA and Luca Parmitano of the European Space Agency (ESA) will venture outside the International Space Station starting at ~6:50 a.m. EST to continue repairing the Alpha Magnetic Spectrometer (AMS) instrument. This is the third in a series of repair spacewalks - the most complex of this kind since the servicing of the Hubble Space Telescope.
You can watch live, high-definition views of Earth from the International Space Station thanks to NASA's High Definition Earth Viewing Experiment (HDEV). This live video provides alternating views from four of the station's external cameras nearly 24/7, with the exception of regular and temporary dropouts that occur when the station switches its connection between different communications satellites. Watch it live in the window above, courtesy of NASA TV. 
"Behold, the Earth! See live views of Earth from the International Space Station coming to you by NASA's High Definition Earth Viewing (HDEV) experiment.
"While the experiment is operational, views will typically sequence though the different cameras. If you are seeing a black image, the Space Station is on the night side of the Earth. If you are seeing an image with text displayed, the communications are switching between satellites and camera feeds are temporarily unavailable. Between camera switches, a black & gray slate will also briefly appear.
"The experiment was activated on April 30, 2014, and is mounted on the External Payload Facility of the European Space Agency’s Columbus module. This experiment includes several commercial HD video cameras aimed at the Earth which are enclosed in a pressurized and temperature-controlled housing. To learn more about the HDEV experiment.
"Please note: The HDEV cycling of the cameras will sometimes be halted, causing the video to only show select camera feeds. This is handled by the HDEV team and is only scheduled on a temporary basis. Nominal video will resume once the team has finished their scheduled event."
Find out what the astronauts and cosmonauts aboard the International Space Station are up to by tuning in to the "ISS Live" broadcast. Hear conversations between the crew and mission controllers on Earth and watch them work inside the U.S. segment of the orbiting laboratory. When the crew is off duty, you can enjoy live views of Earth from Space. You can watch and listen in the window below, courtesy of NASA.
"Live video from the International Space Station includes internal views when the crew is on-duty and Earth views at other times. The video is accompanied by audio of conversations between the crew and Mission Control. This video is only available when the space station is in contact with the ground. During the 'loss of signal' periods, viewers will see a blue screen.
"Since the station orbits the Earth once every 90 minutes, it experiences a sunrise or a sunset about every 45 minutes. When the station is in darkness, external camera video may appear black, but can sometimes provide spectacular views of lightning or city lights below." 
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