World Water Monitoring Day was established in 2003 by America’s Clean Water Foundation as a global educational outreach program that aims to build public awareness and involvement in protecting water resources around the world by empowering citizens to carry out basic monitoring of their local water bodies. Participate in your home and community this year!
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Clean Up the World
Clean Up the World is a community-based, environmental campaign that inspires and empowers communities around the globe to clean up, fix up and conserve their environment. Participate in an event in your community or start one yourself!
International day for the preservation of the ozone layer
More info here.
Double shadow transit on Jupiter
The shadows of Europa and Callisto cross the face of Jupiter simultaneously, best seen from India and central Asia.
Vesta and the Moon
The moon passes just south of the asteroid Vesta in the constellation Libra.
Saturn and the Moon
The moon passes just north of the Saturn in the constellation Libra.
Ceres and the Moon
The moon passes just south of the dwarf planet Ceres in the constellation Libra.
Equinox
The sun crosses the celestial equator moving southward. Day and Night are of equal length. The sun rises due east and sets due west everywhere on Earth. This is the autumnal equinox in the Northern Hemisphere, the vernal equinox (Spring) in the Southern Hemisphere.
Mercury close to Spica
The planet Mercury will pass close to the bright star Spica in Virgo. This is a particularly good apparition of Mercury for observers in the Southern Hemisphere, less so for northerners.
Aldebaran and the Moon
The waning last quarter moon will pass just north of the bright star Aldebaran in the constellation Taurus.