Thank you, Emily, for doing this, and thank you, Helvick, for the pointer.
One comment from the press conference, quoting Alan Stern here:
"It will be the 50th anniversary to the day of the Mariner 4 flyby of Mars, the flyby that opened the reconnaissance of planets beyond Earth."
Technically, one should say that it was Mariner 2's successful flyby of Venus in December of 1962 that truly began "the reconnaisance of planets beyond Earth."
I presume just because Mariner 2 did not take any photographs of the planet does not preclude its achievements? Mariner 5 also did not image Venus in 1967, but it helped to confirm Mariner 2's findings of Venus' incredibly hot surface.
Of course there were successful lunar and interplanetary probes before the Mariners (Pioneer 5 in 1960) and one should remember the probes such as the Soviets' Venera 1, which flew by Venus in 1961 but lost contact with Earth before reaching that world. But Mariner 2 should really get the first credit.
I was very careful to choose my words to say "beyond" Earth mening outward from
the Sun. Unfortunately, I see now that even that description was a little ambiguous.
http://www.nasm.si.edu/research/dsh/artifa...SS-mariner2.htm