Astronomy Picture of the Day
    


Planet Earth at Twilight
<< Yesterday 22.04.2022 Tomorrow >>
Planet Earth at Twilight
Credit & Copyright: ISS Expedition 2 Crew, Gateway to Astronaut Photography of Earth, NASA
Explanation: No sudden, sharp boundary marks the passage of day into night in this gorgeous view of ocean and clouds over our fair planet Earth. Instead, the shadow line or terminator is diffuse and shows the gradual transition to darkness we experience as twilight. With the Sun illuminating the scene from the right, the cloud tops reflect gently reddened sunlight filtered through the dusty troposphere, the lowest layer of the planet's nurturing atmosphere. A clear high altitude layer, visible along the dayside's upper edge, scatters blue sunlight and fades into the blackness of space. This picture was taken in June of 2001 from the International Space Station orbiting at an altitude of 211 nautical miles. Of course from home, you can check out the Earth Now.

Celebrate: Today is Earth Day

January
February
March
April
May
June
July
August
September
October
 < April 2022  >
Mo Tu We Th Fr Sa Su




123
45678910
11121314151617
18192021222324
252627282930
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Based on Astronomy Picture Of the Day

Publications with keywords: Earth's atmosphere
Publications with words: Earth's atmosphere
See also:
All publications on this topic >>