Explanation: Sometimes it’s night on the ground but day in the air. As the Earth rotates to eclipse the Sun, sunset rises upfrom the ground. Therefore, at sunset on the ground, sunlight still shines on clouds above. Under usual circumstances, a pretty sunset might be visible, but unusual noctilucent clouds float so high up they can be seen well after dark. Normally
The best portable charger is the Anker Prime Power Bank (26K, 300W) ($229.99 at Anker as of October 2026), because it can fast-charge two laptops and a phone at once, gets back to 80 percent in 40 minutes by Anker’s rating, and stays just under the 100Wh airline limit. If you carry an iPhone, the
The large sunshade of NASA’s Near-Earth Object (NEO) Surveyor mission is inspected by a technician at BAE Systems Space & Mission Systems in Boulder, Colorado, in late July. Built by Applied Aerospace in Stockton, California, the sunshade structure was outfitted with its solar cells by SolAero Technologies in Albuquerque, New Mexico, in January. Environmental testing
This 360-degree look at Neretva Vallis within Mars’ Jezero Crater was stitched together using 217 images acquired by the rover’s Mastcam-Z on May 20, 2024, the 1,155th Martian day, or sol, of the mission. While it is a wind-swept dusty vista today, billions of years ago it was home to a river channel that fed fresh water into Jezero
The large sunshade of NASA’s Near-Earth Object (NEO) Surveyor is mounted on an assembly ring during inspections in a clean room at BAE Systems Space & Mission Systems in Boulder, Colorado, in July 2026. The sunshade structure stands 20 feet (6 meters) tall and measures 8 feet (2.4 meters) wide at its base. Its two flat panels,
Over 1,645 Martian days, NASA’s Perseverance Mars rover measured the fine and ultrafine Martian dust particles found clinging to samples of spacesuit materials that are carried aboard the rover, including some that are small enough to penetrate the lungs and enter the bloodstream. The findings will be published Tuesday, Oct. 27, in the Proceedings of