How to Watch NASA Launch Its New Perseverance Mars Rover

How to Watch NASA Launch Its New Perseverance Mars Rover

The skycrane is outfitted with eight small engines that start firing when the rover is about half a mile up to rapidly slow its fall to just a few miles per hour.“These particular engines are actually a derivative of the original engines developed for Viking landers in the early ’70s, but we've made very significant upgrades,” says Fred Wilson, a propulsion expert at Aerojet Rocketdyne, the company that made the propulsion system for the Perseverance landing system.

A New Air Taxi Model Takes Design Cues From a Far-Flying Bird

A New Air Taxi Model Takes Design Cues From a Far-Flying Bird

Code-named Alia, the electric vertical-takeoff-and-landing (eVTOL) airplane is the successor to Ava, a smaller prototype the company used to experiment with propulsion strategies and learn about the tricky aerodynamics of small, electrified, vertical-lift flight.

An Astronomer Explains Black Holes at 5 Levels of Difficulty

An Astronomer Explains Black Holes at 5 Levels of Difficulty

Perhaps you even know about things like event horizons, the boundary outside of which escape becomes possible, and gravitational waves , the ripples that black holes generate in the cosmic fabric when they collide.

NASA's Nuclear Idea, an Unfixable Apple Flaw, and More News

NASA's Nuclear Idea, an Unfixable Apple Flaw, and More News

Nuclear rockets could wind up in space, a researcher unveiled a massive and unfixable iPhone flaw, and US police forces are using doorbell cameras to fight crime.NASA wants to send nuclear rockets to the moon and Mars.

An Itty-Bitty Robot That Lifts Off Like a Sci-Fi Spaceship

An Itty-Bitty Robot That Lifts Off Like a Sci-Fi Spaceship

But it’s never dreamed up ion propulsion, a fantastical new way to power robots by accelerating ions instead of burning fuel or spinning rotors. But that’s a ways off, because at the moment the four-thruster machine can produce a bit more thrust than it needs to get its weight off the ground.

A Mythical Form of Space Propulsion Finally Gets a Real Test

A Mythical Form of Space Propulsion Finally Gets a Real Test

Over the course of 55 experiments, Tajmar and his colleagues registered an average of 3.4 micro-Newtons of force from the EmDrive, which was very similar to what the NASA team found.