Communications Blackout Ended: NASA’s Ingenuity Mars Helicopter Finally Calls Home

NASA Ingenuity helicopter on Mars illustration

NASA’s Ingenuity Mars helicopter successfully completed its 52nd flight on April 26 despite communication difficulties that led to a loss of contact as the helicopter descended for a touchdown. (Illustration of NASA’s Ingenuity Helicopter on Mars.) Credit: NASA/JPL-Caltech

There’s a giant gravity hole in the Indian Ocean, and maybe we’ll finally know why

Map showing the gravitational depression in blue under the Indian Ocean and the location of the seismometers deployed on the seabed.

The pull of gravity is a constant on Earth, but our planet is not a uniform sphere. It’s covered in lumps and bumps, with geology of varying density that tugs at nearby landmasses with slightly different degrees of strength in an undulating map known as a geoid. Deep in the Indian Ocean, that pull weakens … Read more

We finally know how the mysterious Geminids meteor shower originated Ars Technica

Image of streaks in a night sky.

Zoom in / The Geminids put on a show every year. Every year, skywatchers can watch the Geminids dart across the night sky from mid-November to late December. However, this meteor shower is highly unusual, and not just because it’s one of the easiest to see. Meteor showers usually come from comets flying close to … Read more