New Satellite Engine Uses Earth’s Atmosphere for Infinite Orbit

An atmosphere-breathing electric propulsion system developed in PhD research at the University of Stuttgart uses thin upper-atmospheric gases as fuel for a radio-frequency helicon plasma thruster, potentially letting satellites stay in Very Low Earth Orbit indefinitely without carrying a conventional supply of propellant. VLEO Satellite Benefits and Atmospheric Drag Challenges Operating a satellite in Very … Read more

New Highest-Resolution Image of the Sun Reveals Unseen Swirls

The Daniel K. Inouye Solar Telescope in Hawai’i captured the highest-resolution images of the Sun ever recorded, revealing spinning plasma vortices as narrow as 20 kilometers across along the boundaries of magnetic structures in the photosphere. According to findings published in Nature in August, and led by David Kuridze of the National Solar Observatory, these … Read more