From The Ground Up

Some of the things we can do these days are pretty amazing, when you stop and think about it. Here’s an example: earlier this month an astrophotographer took a picture of astronauts performing spacewalk maneuvers around the International Space Station–from the ground. That’s the photo, above.

Dr. Sebastian Voltmer took the photograph on March 23, as astronauts Raja Chari (from NASA) and Matthias Maurer (from the European Space Agency) were in the middle of a seven-hour spacewalk. Dr. Voltmer took the picture just after sunset, from Maurer’s hometown of Sankt Wendel, Germany. You can see the two astronauts in the photo–which Dr. Voltmer considers to be a “once-in-a-lifetime image.”

What’s amazing is that the ISS orbits the Earth at an average altitude of 227 nautical miles, or 420 kilometers. Dr. Voltmer says he used a Celestron 11-inch EdgeHD telescope on a GM2000 HPS mount and an ASI290 planetary camera to take the photo–which means you probably shouldn’t attempt this with your new iPhone.

A clear photo taken from the ground of astronauts working on a space station, 227 miles up? I guess the future is here.