(CNN) -
Millions of Americans will vote by mail or in person for the next president of the United States.
And in addition, at least one vote will be cast about 200 miles above Earth.
NASA astronaut and flight engineer Kate Rubins plans to vote from the International Space Station, NASA confirmed to CNN, where she will be deployed during the voting period.
LEE: We explain how the voter registration for the 2020 elections in the USA works.
Rubins, along with two Russian cosmonauts, will spend six months in space as part of the Expedition 63/64 crew.
Following its launch in October, Rubins will investigate "the use of laser-cooled atoms for future quantum sensors."
He will also carry out cardiovascular experiments from the space station.
But there will also be time to vote.
Rubins cast her vote from space in 2016, NASA said, when it was also doing research on the space station.
(During that 2016 spaceflight, she became the first person to sequence DNA in space.)
NASA astronaut Kate Rubins will cast her electronic vote from space in the upcoming elections, the space agency confirmed.
NASA explains how to vote from space
Astronauts registered to vote in Texas were granted the right to vote from space in 1997. That year Texas lawmakers ruled that they could electronically cast their vote from off-planet if they were on a space flight during the early voting period or the day election, according to the Smithsonian's National Air and Space Museum.
NASA's Johnson Space Center is located in Houston, so most astronauts are based in the city and registered to vote in Harris County, where Houston is located.
Here's how the space voting process works, NASA told CNN: The Harris County Clerk uploads a secure electronic ballot to NASA's Johnson Space Center Mission Control Center.
NASA astronauts, with specific credentials, access your ballot and cast their vote.
This is sent to the county clerk's office by email.
CNN has reached out to the Harris County Clerk's Office Elections Division for more information on how interstellar voting will work in 2020 and is waiting for a response.
Elections 2020 United StatesNASA