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2018.12.15

New Horizons spacecraft's arrival at the next destination is upcoming New Year's Day.
Even though it's impossible to observe the target thoroughly like Hayabusa2 ,
From various articles after New Horizons' Pluto flyby , I understand that we can discover various things just from surface images .
I also wish good luck on Hayabusa2.
Both are on important mission to explore the origin of Solar System .
Voyager 1 .
When I was a junior high school student, I was deeply interested in space exploration,
Especially I was bit with Voyager programs, but backed down after I flunked in mathematics in high school.
The trigger I came back in spring 2015 was New Horizons.
Then I came to be able to read website of NASA and Voyager program, and I came back in full swing.
So I suppose I ought to see out Voyager programs until both of them use up electricity and send final contacts to Earth.

Since I read the news on Oct. 5 that Voyager 2 is sending data showing that it's nearing Interstellar space ,
I've wondered when it's reaching the edge of the Solar System.
If my memory serves me right, when Voyager 1 entered Interstellar space in Aug. 2012 , the location was about 18.3 or 18.5 billion kilometers from the Sun.
As of Dec. 1, 2018 , Voyager 2 was about 17.8 billion kilometers from the Sun.
Then, with a quick bit of math, it has 500 or 700 million kilometers to go to reach the edge of the Solar System.

Voyager 2 turned out to reach Interstellar space on Nov. 5 , and it became a spacecraft that visited four planets and entered Interstellar space.
At last! Congratulations!
Incidentally, as of Dec. 10 , Voyager 1 was about 21.5 billion kilometers from the Sun.
Can anybody see the moment the flight distance meter of Voyager 1 on website of JPL indicating 22,222,222,222km!?
Keep going, deserving the name!

cf. https://www.jpl.nasa.gov/news/news.php?feature=7252