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Calculations reveal it is possible for the spacecraft to visit all four giant outer planets, using the gravity of each planet to swing to the next. this alignment happens every 176 years.

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Voyager is approved by NASA.

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The Voyager mission was renamed 'Voyager' instead of 'The Mariner Jupiter/Saturn 1977 Project"

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The Voyager 2 satellite is launched.

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Voyager 1 launches

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Voyager 1 encounters Jupiter

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The Voyager 2 reaches Jupiter for the first time.

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Voyager 1 leaves Jupiters surface and makes the closest aproach to Saturn.

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Voyager 2 makes way towards Saturn and reaches as close it can to Saturns surface.

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Voyager 2 encounters Uranus.

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NASA completes their expansion on their big dishes in:
Goldstone, California
Madrid, Spain
Canberra, Australia
All to capture all sorts of radio signals from each Voyager, in hope to here from it in Neptune.

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Voyager 2 makes its way to Neptune and reaches it.

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Voyagers cameras get turned off by engineers because they wanted to use it for power, computer memory, and data rate for the solar wind and intersellular space.

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4 billion miles away from the sun, the Voyager 1 takes the last photo and its titled, "Solar System Family Portriat."

Citation: Wall, Mike. “Happy Birthday, 'Pale Blue Dot!' Famous Space Photo Turns 25.” Space.com, Space, 14 Feb. 2015, https://www.space.com/28564-voyager1-pale-blue-dot-photo-25-years.html.

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Voyager 1 passes Pioneer 10, making Voyager 1 the farthest human-made object from Earth to space.

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Voyager 1 crosses termination shock*, and unfortunately the antennas on the Voyager 1 so it didnt get any transmittion from the spacecraft.

Termination Shock: A part in the galaxy where solar wind slows down suddenly and heats up quickly when approaching interstellular wind.

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Voyager 2 crosses the termination shock to the heliosheath, the outer layer of the bubble the sun blows around itself and all of the planets. This time, antennas at earth are listening for Voyager 2's data transmissions and scientists are able to analyze the first measurments of the passage through the termination shock.

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Voyager 2 becomes NASA's longest-operating mission, breaking the previous record for continous operation by Pioneer 6 (12,758 days of operation, starting on December 16, 1965.)

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Voyager 1 enters interstellar space, passing beyond the helipause, which is the boundry between our solar bubble and the matter ejected by explosions of other stars. It is the first time a human-made object crosses the threshold of interstellar space. Since the spacecraft is continously gathering data, Voyager detects the full intensity of cosmic rays in interstellar space for the first time on this day and also makes the first measurement of the interstellar magnetic field wrapped around the outside of the heliosheath. The crossing itself, however, is not confirmed until April 9th, 2013

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Voyager 1 makes the first measurment of the density of the interstellar medium, when a wave caused by a coronal mass ejection from the sun reaches Voyager 1 and causes the plasma in interstellar space to ring. The high pitch of the ringing indicates the density of the plasma surrounding Voyager 1 is more than 40 times higher than previously measured, confirming the spacecraft is in the interstellar space and has been since August 25th, 2012

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For the second time in history, a human-made object reaches the space between the stars. NASA's Voyager 2 probe exits the heliosphere- the protective bubble of particles and magnetic fields created by the sun.