Voyager 1: NASA's Interstellar Space Mission and Scientific Discoveries

Category: Science and Technology — Space Exploration

Voyager 1 is a NASA space probe launched to study the outer planets and the distant regions of the Solar System. It became the first human-made spacecraft to enter interstellar space.

Key facts

  • Launch date: 5 September 1977.

  • Launch organisation: NASA.

  • It conducted flybys of Jupiter and Saturn.

  • Its observations contributed significantly to understanding the atmospheres, moons, magnetic environments and rings of the giant planets.

  • Voyager 1 crossed the heliopause in August 2012, entering interstellar space.

  • It continues to travel away from the Sun while communicating with Earth over an increasingly large distance.

Scientific significance

  • It provided close-up observations of Jupiter and Saturn and their moons.

  • Its instruments measure properties of the interstellar environment, including magnetic fields and charged particles.

  • It carries a Golden Record containing sounds, images and greetings intended to represent aspects of life and civilisation on Earth.

UPSC key pointers

  • Voyager 1 was launched in 1977.

  • It entered interstellar space in 2012.

  • The heliopause marks the boundary where the solar wind's influence gives way to the interstellar medium.

  • Voyager 1 and Voyager 2 are separate spacecraft; Voyager 2 also entered interstellar space, in 2018.

  • Interstellar space does not mean that the spacecraft has left the Milky Way.