Parker Solar Probe
A memory card containing the names of over 1.1 million people was mounted on a plaque and installed below the spacecraft’s high-gain antenna on 18 May 2018. The card also contains photos of the probe’s namesake, physicist Eugene Newman Parker and a copy of his 1958 scientific paper predicting important aspects of solar physics.
On 29 October 2018, at about 18:04 UTC, the spacecraft became the closest ever artificial object to the Sun. As of its perihelion 29 April 2021, the Parker Solar Probe’s closest approach is 10.5 million kilometres (6.5 million miles). This will be surpassed after each successive flyby of Venus.