Things to Do in L.A. Tap to enable a layout that focuses on the article. The first woman to pilot a SpaceX Dragon spacecraft and the last to "touch" the Hubble space telescope retired after more than two decades with NASA Some explorers have focused on alpine heights. Megan McArthur is one of the elite few who can say she's piloted both submarines and spacecraft, exploring expanses from the ocean floor to low Earth orbit, looking down on the planet from 250 miles above. Now McArthur, 54, is retiring from NASA, where she has served for more than two decades as an astronaut and senior leader at the agency's Jet Propulsion Laboratory in Houston. Emily Carney, a space historian, described McArthur as a pioneer, one of the first 100 women to fly in space, and someone with a "magnificent career."

SpaceX is preparing for its first test flight of the firm's Crew Dragon spacecraft which will travel to the International Space Station tomorrow on the company's Falcon 9 rocket. The unmanned flight will mark the first time a commercially-built American craft designed to carry astronauts will travel to the space station from US soil. There will be no astronauts aboard but in their place will be a mannequin called Ripley, named after the main character in the'Alien' science fiction franchise. Ripley is equipped with sensors designed to record details of the trip and provide data vital for future manned missions. SpaceX is preparing for its first test flight of its Crew Dragon spacecraft which will fly to the International Space Station tomorrow on the company's Falcon 9 rocket.

NASA video shows a robotic arm releasing the SpaceX Dragon spacecraft from the International Space Station over Australia. A link has been sent to your friend's email address. NASA video shows a robotic arm releasing the SpaceX Dragon spacecraft from the International Space Station over Australia.