Symptoms of Age-Related Macular Degeneration (AMD) An early symptom of wet AMD is that straight lines appear wavy. An Amsler Grid chart can help spot this early distortion of vision. You may also notice a small blind spot, resulting in a loss of central vision.
Traveling at approximately 29,000 km/h (18,000 mph) the shuttle orbits Earth every 90 minutes. By using current technology and a spacecraft powered by chemical rocket engines, a trip to Mars could take between six to nine months.
How long does it take to get to Mars? NASA's New Horizons probe is the fastest spacecraft launched from Earth as of January 2015. It traveled at 36,000 miles per hour when it was launched in 2006. If it had traveled to Mars during the closest approach to Earth, it could have arrived in as little as 39 days.