保护地球，探索宇宙，发现文明
2021年11月25日 At the Shadow’s Edge Image Credit & Copyright: Jean-Francois Gout Explanation: Shaped like a cone tapering into space, the Earth’s dark central shadow or umbra has a circular cross-section. It’s wider than the Moon at the distance of the Moon’s orbit though. But during the lunar eclipse of November 18/19, part of the ...
2021年05月28日 Total Lunar Eclipse from Sydney Image Credit & Copyright: Peter Ward (Barden Ridge Observatory) Explanation: The reddened shadow of planet Earth plays across the lunar disk in this telescopic image taken on May 26 near Sydney, New South Wales, Australia. On that crisp, clear autumn night a Perigee Full Moon slid through the northern edge of ...