A Florida family hopes to make their late son's "one dream" come true by sending his ashes to the moon. Matthew Gallagher, 11, of Polk County, died unexpectedly in May. Scott and Cori Gallagher, Matthew's parents, have since decided to honour their son by sending his ashes to the moon through Celestis Memorial Spaceflights. "We chose the Luna flight so that way, every time we look at the night sky and the moon, we will know Matthew is where he truly belongs," Cori tells PEOPLE. To do so, the Gallaghers are raising money via GoFundMe to cover the flight, which has a starting price of $12,500. "We knew that our only real way to honour him was to somehow get him to space," Cori tells PEOPLE. In addition to being "a silly and loving kid," Cori says Matthew had an "extreme love" for space, including, "NASA, SpaceX, anything Elon Musk, and flying." She believes her son "knew from a young age he belonged in the sky," as well. The Destiny Flight will bring Matthew's remains to the moon in a "personal flight capsule". Loved ones are also invited to attend the rocket's launch and tour of the launch site prior to takeoff. The flight is scheduled to launch in 2023. This is "the greatest way to fulfill his greatest dream," Scott says.