The five-year flight to Jupiter will put extreme stress on Juno, and balance and proper center of gravity are crucial. Aside from the sun, Jupiter is considered one of the harshest planetary environments.
In addition to extreme cold temperatures and intense, damaging radiation, Juno will reach extremely stressful speeds along its journey.
After performing what is known as a gravitational slingshot out of Earth's orbit in Jupiter's direction, Juno will coast along, picking up speed due to Jupiter's large size and huge gravitational pull.
Eventually, as it closes in on Jupiter, Juno will reach speeds of 150,000 miles per hour, making it the fastest human-made object ever, before igniting its thrusters and slowing down to make the transition into Jupiter's orbit.