A lot of the data collected by NASA space probes are publicly available from example:

spdf.gsfc.nasa.gov

Here is a collection of some of investigation of the data.

All the code is available on GitHub

Pioneer 10

Charged Particle Instrument (CPI) Data

Pioneer 10 CPI

Voyager

Cosmic Ray System (CRS) Data

Voyager CRS

New Horizons

Solar Wind Around Pluto (SWAP) Data

New Horizons SWAP