The International Space Station streaks across the face of the Moon! The ISS travels at 28,000 km/h (17,500 mph) — completing an orbit around Earth roughly every 90 minutes. It only takes about half a second for it to cross the Moon from our perspective! Astronauts aboard experience 16 sunrises and sunsets per day. Spotting the ISS requires perfect timing — these lunar transits are often visible from just a few kilometers-wide path on Earth. #NASA #spaceexploration #SpaceX | Astro Clips