Chanhassen resident Tom Vande Hei has an app on his phone that alerts him when the International Space Station is about to float across the sky above him.
For 168 days — from fall 2017 through February 2018 — Vande Hei and his wife, Mary, would go gaze at the sky whenever the space station crested the horizon.
It was only visible for one minute, three minutes, maybe seven minutes. But that was enough time to feel close to their son, Mark.
"He's only 240 miles away," Tom Vande Hei said.
Mark Vande Hei completed his first spaceflight in 2018 as an Expedition 53/54 crew member, during which he conducted four spacewalks, researched microgravity and measured the sun's energy input to Earth.
The Benilde-St. Margaret's and 1989 St. John's University graduate is slated to launch his second mission to the space station April 9. He'll participate in a live news conference at 10 a.m. Monday from the Gagarin Cosmonaut Training Center in Star City, Russia. It will air at nasa.gov/nasalive.
Vande Hei will join two Russian cosmonauts on the Expedition 64/65 crew, which is tasked with conducting hundreds of experiments to learn more about living in space.
"The space station is a critical test bed for NASA to understand and overcome the challenges of long-duration spaceflight and those insights gained will help send humans to the moon and eventually to Mars," states a NASA news release.