Voyager 1 and 2 are two spacecraft that have been traveling through space for over 47 years. They have been exploring the vast cosmos and sending back valuable data. But now, they are facing a big problem. Their power is running out. To keep them going, NASA engineers have had to turn off some of their science instruments. This is a tough decision, but it's necessary to extend the life of these iconic missions.

        The first instrument to go was Voyager 1's cosmic ray subsystem experiment, which was shut down on February 25. Next, Voyager 2's low-energy charged particle instrument will be turned off on March 24. These instruments were turned off to save power. Without these energy-conserving measures, the Voyagers would have run out of power in a few months.

        The Voyagers are powered by the heat from decaying plutonium, which is converted into electricity. Each year, they lose about 4 watts of power. To save energy, the mission team has turned off systems that are not essential. Each Voyager started with 10 science instruments, but now they only have three each. Some of these instruments were used to collect data during planetary flybys and were turned off once the Voyagers completed their exploration of the solar system's planets.

        Voyager 1 reached the beginning of interstellar space in 2012, and Voyager 2 followed in 2018. They are now studying the heliosphere and interstellar space. In October 2024, Voyager 2's plasma science instrument will be turned off to conserve power. Voyager 1's cosmic ray subsystem, which was shut down last week, helped determine when and where Voyager 1 exited the heliosphere. Voyager 2's low-energy charged particle instrument, which will be shut off later this month, measures various ions, electrons, and cosmic rays.

        Voyager 1 still has its magnetometer and plasma wave subsystem, and its low-energy charged particle instrument will be shut off next year. Voyager 2 will continue to collect data through its magnetic field and plasma wave instruments, while its cosmic ray subsystem is scheduled to be shut off in 2026. The Voyagers have far surpassed their original mission to study the outer planets. Every bit of additional data they gather is valuable bonus science for heliophysics.

        Voyager 1 and 2 were launched in 1977, with Voyager 1 taking a faster route and making close encounters with Jupiter and Saturn. Voyager 2 explored the icy giants Uranus and Neptune. Voyager 1 is more than 15 billion miles away from Earth, while Voyager 2 is over 13 billion miles away. With the current energy-conserving plan, NASA engineers believe the twin spacecraft could continue operating into the 2030s with one instrument each. Every day could be our last to receive data from these spacecraft.

        The Voyagers have been deep space pioneers, and their journey has been nothing short of extraordinary. They have provided us with invaluable insights into the cosmos. As they continue their journey, they face an uncertain future. But one thing is for sure: their legacy will live on, inspiring future generations of scientists and explorers. The Voyagers are a testament to human ingenuity and our relentless pursuit of knowledge.

Voyagers' Power Struggle: The Race Against Time

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