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It’s time to look back at spaceflight in 2023, a real “two steps forward, one step back” kind of year, filled with highs, lows, and everything in between.
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For the first time, a SpaceX Falcon Heavy will attempt to deliver the Pentagon’s spaceplane to low Earth orbit. The mission marks the seventh for the mysterious spacecraft, aiming to expand the Space Force’s knowledge of the space environment and test new technologies.

A Martian moons mission, a plethora of private lunar landers, probes to Venus and Jupiter, and reusable heavy-lift rocket tests are among the many highlights we’ll be watching in the coming 12 months, in what looks to be an extraordinary year in spaceflight. Here’s your 2024 calendar.
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X-planes are a class of experimental aircraft designed to test and demonstrate new innovations in flight—some were created for NASA, others for DARPA or the U.S. military. The first X-plane, X-1, was flown by Chuck Yeager in the 1940s and was the first craft to fly faster than the speed of sound. Over the decades,…
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