Helion Energy achieves plasma at a stunning 150 million degree Celsius, well above the threshold to eventually generate stable fusion power.

Watch the Dawn Aerospace's Mk-II Aurora Spaceplane light up it rocket engine test flight. Credit: Dawn Aerospace ...

The powerful Vulcan faces its biggest test yet as it prepares to launch on its second national security mission from Florida.

With the upcoming launch, SpaceX is eager to prove Starship V3’s readiness for more ambitious test flights, including an important orbital refueling experiment considered a stepping stone toward ...

Russian engineers are betting that a radically different rocket engine can compress the long slog to Mars into something closer to an interplanetary commute. Their new plasma propulsion prototype, ...

General Galactic, cofounded by a former SpaceX engineer, plans to test its water-based propellant this fall. If successful, it could help usher in a new era of space travel. That's a big “if.” ...