Where does this come from, and can I check it?

It is beyond 160 times the Earth-Sun distance and still transmitting. The figure is taken from NASA Voyager, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a space fact?

Yes. It sits on the Space shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Voyager 1 is the furthest human made object

It is beyond 160 times the Earth-Sun distance and still transmitting Voyager 1 launched in 1977 and crossed the heliopause in 2012 into interstellar space. Its radio signal takes more than 22 hours to reach Earth. Power from its plutonium generators falls about 4 watts a year, so instruments are switched off one by one. It sits in Mondo's space collection, one of 200 facts that each trace back to the reference below.

Where this comes from

NASA Voyager

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

Go further

Space & Astronomy trivia

More facts like this

Voyager 1 is the farthest human object from EarthLaunched in 1977 the robotic probe is now travelling through interstellar space Cassini released a probe that landed on TitanHuygens touched down in January 2005 and sent data for over an hour New Horizons reached Pluto after nine and a half yearsThe flyby in July 2015 was the first close look at the dwarf planet The Voyager golden record covers 90 minutesIt carries greetings in 55 languages, music and 116 encoded images Gravity assists trade planetary motion for spacecraft speedA flyby borrows a little orbital energy from the planet it passes Oumuamua was the first confirmed interstellar visitor to our solar systemA strange elongated object from another star system sped past the Sun in 2017

Tags: voyager, interstellar, probes

Voyager 1 is the furthest human made object: the short answers

Where does this come from, and can I check it?: It is beyond 160 times the Earth-Sun distance and still transmitting. The figure is taken from NASA Voyager, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a space fact?: Yes. It sits on the Space shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.