WASHINGTON - The four astronauts continue their historic journey around the Moon and are now on their fifth day in space.
They're preparing for a closely watched lunar flyby expected on Tuesday.
NASA Science Mission Directorate, Kelsey Young said this is exciting.
"We are coming up on the flyby tomorrow. We're getting really, really excited to hear the crew's observations. We've heard some observations, Lori highlighted them, from when the Moon was much smaller out the window than it's gonna be tomorrow. And even those observations had a lot of science value that's already got our lunar science team charting in the background. So really excited for several straight hours of those tomorrow."