On August 21, 2017, the shadow of the Moon will sweep across the U.S. landscape, transforming day to twilight. In the surreal gloaming of an eclipse, the temperature drops, birds go silent, crickets begin to chirp, and blossoms start to close. As this scene plays out across a 70-mile wide path of totality from coast to coast, a continent-spanning wave of instruments -- ranging from home-made pinhole cameras and certified eclipse safety glasses to the most sophisticated telescopes in operation today – will be trained on the Eclipse Across America.
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Cloud cover? Cannot travel? Don’t fear! Watch the total solar eclipse online!
NASA’s Cassini mission will come to a spectacular close on September 15, 2017 at 5:07 a.m. PDT after almost two decades in space since its launch in 1997. The spacecraft has been orbiting Saturn and studying that system for 13 years. It’s now checking off items from a daring bucket list as it makes the most of its final months.
Are you ready for the eclipse? Learn more here!
Hold out your hand for 10 seconds. A dozen electrons and muons just zipped unfelt through your palm. The ghostly particles are what scientists call "secondary cosmic rays" -- subatomic debris from collisions between molecules high in Earth's atmosphere and high-energy cosmic rays from outer space.
This daily shower, which never stops, is a sign of violent events in deep space.
Sky watchers in the United States have been waiting for this date for years. On Aug. 21, 2017, there’s going to be a total eclipse of the Sun. With the path of totality stretching from Oregon to South Carolina, people can see the eclipse from coast to coast. The timing of the eclipse will provide the opportunity for viewers to see one of the biggest astronomical events of the century just a few weeks after enjoying one of the biggest meteor showers of the year.
Humanity’s farthest and longest-lived spacecraft, Voyager 1 and 2, achieve 40 years of operation and exploration this August and September. Despite their vast distance, they continue to communicate with NASA daily, still probing the final frontier.
A few NASA-funded astronomer teams are always on the hunt for potentially hazardous near-Earth objects, asteroids and comets whose orbits periodically bring them within 30 million miles of Earth’s orbit. At NASA, the Planetary Defense Coordination Office supports the search programs, while also planning and coordinating any response to possible asteroid impacts.
Getting a Feel for Eclipses explains details surrounding the August 2017 total solar eclipse. Tactile graphics provide an illustration of the interaction and alignment of the Sun with the Moon and the Earth.