By Tom DeRosa, Executive Director of CSI. It’s the night sky, visible to all, that reveals the grand universe. Its countless stars and vast expanses fill us with awe and wonder about the cosmos and its mysteries. It has inspired many to look up at night and witness numerous objects moving in space at incredible speeds. Earth orbitsthe sun at 77,000 miles per hour (mph), while the sun and its solar system travel through space at about 500,000 mph. The Milky Way galaxy, where we live, spins at 1,100,000 mph as it careens through space. And yet,