保护地球，探索宇宙，发现文明
2021年01月13日 Arches Across an Arctic Sky Image Credit & Copyright: Giulio Cobianchi Explanation: What are these two giant arches across the sky? Perhaps the more familiar one, on the left, is the central band of our Milky Way Galaxy. This grand disk of stars and nebulas here appears to encircle much of the southern sky. Visible below the stellar arch is ...
2021年01月01日 Galaxies and the South Celestial Pole Image Credit & Copyright: Petr Horalek, Josef Kujal Explanation: The South Celestial Pole is easy to spot in star trail images of the southern sky. The extension of Earth’s axis of rotation to the south, it’s at the center of all the southern star trail arcs. In this starry panorama streching...
2020年11月17日 A Glowing STEVE and the Milky Way Image Credit: NASA, Krista Trinder Explanation: What’s creating these long glowing streaks in the sky? No one is sure. Known as Strong Thermal Emission Velocity Enhancements (STEVEs), these luminous light-purple sky ribbons may resemble regular auroras, but recent research reveals significant differences. A...
2020年10月21日 A Night Sky Vista from Sardinia Image Credit & Copyright: Tomáš Slovinský Explanation: How many famous sky objects can you find in this image? The featured dark sky composite combines over 60 exposures spanning over 220 degrees to create a veritable menagerie of night sky wonders. Visible celestial icons include the Belt of Orion, the Orion ...