A highly-anticipated mission to Jupiter and its intriguing moons is gearing up for liftoff, ready to begin an eight-year journey through the solar system to reach icy worlds that may host some form of life.

NASA Delays Return to Earth’s Evil Twin, Venus

Update: April 13, 8:11 a.m. ET: Thursday’s launch was scrubbed due to the threat of lightning. ESA and Arianespace will try again on Friday, April 14, at 8:14 a.m. ET.

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The European Space Agency’s (ESA) JUICE mission, or JUpiter ICy moons Explorer, is scheduled for launch at 8:15 a.m. ET on Thursday from Europe’s Spaceport in French Guiana. The spacecraft is packed atop Europe’s Ariane 5 rocket, which will attempt to launch JUICE on a trip to Jupiter.

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