NASA's unmanned New Horizons spacecraft is speeding closer to an historic Pluto flyby.
It's expected to sweep past the previously unexplored dwarf planet early tomorrow morning.
Space commentator Matthew Pavletich joined Paul Henry to tell us what we can expect to learn from the sighting.
"This is near the end of the first golden age of space exploration. Some people are saying you can bookend the first age of space exploration with this mission and it’s been underway for 9.5 years and it’s travelled more than 3 billion miles. It has been an epic odyssey," he says.
Watch the full interview with Matthew Pavletich.