The first close-up measurements of Jupiter's environment were made in 1973 and 1974 by Pioneer 10 and 11, which also took some superb images at a distance of 42,000 km from its atmosphere. In 1979, two separate flybys by Voyager 1 and 2 extended our knowledge of the planet.
A probe was sent into Jupiter’s atmosphere, where it spent 59 minutes measuring temperature, pressure, chemical composition, cloud properties, sunlight, internal energy sources and lightning flashes, before being destroyed by the high pressure and intense heat.
|If you were on Jupiter...|
…you wouldn’t find any solid ground to walk on;
…you’d be unable to breathe the hydrogen, helium, methane and ammonia-rich atmosphere;
…you’d have difficulty moving due to the strong force of gravity;
…the high atmospheric pressure and temperatures would crush and melt any substance or life form;
…you’d experience temperature variations greater than any on Earth, as you moved around in the atmosphere.