Liftoff is set for 1:31 p.m. EDT (1731 GMT). When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The Japan Aerospace Exploration Agency (JAXA) will ...
DARPA’s Falcon Hypersonic Technology Vehicle 2 (HTV-2) hit approximately Mach 20 — about 13,000 miles per hour or 3.6 miles ...