Look for the waning gibbous moon late at night. It might look strangely oblong. Or look for it in the west in early morning, floating against the pale blue sky.
Waning gibbous moon on the morning of July 24, 2016, by Ruy Queiroz in São Paulo, Brazil.
First total solar eclipse visible from the U.S. since 1991 (seen only from part of Hawaii), and first visible from contiguous U.S. since 1979. Start planning now!
Path of 2017 total solar eclipse, via Fred Espenak.
Fly along with Earth’s shadow in a video depicting the path of the August 21, 2017 total eclipse of the sun, first eclipse over the continental U.S. since 1979.
A new study shows that we humans can help maintain healthy forests by focusing conservation efforts on the protection of animal pollinators and seed dispersers.
Animals that help pollinate plants and spread their seeds are critical to keeping forests healthy. Photo via Eike Lena Neuschulz/ AlphaGalileo.
Computer models, and observations of our galaxy and others, suggested a Milky Way X, made of stars. An analysis of data from the WISE space telescope reveals it.
WISE all-sky image of Milky Way galaxy. The circle is centered on the galaxy's central region. The inset shows an enhanced version of the same region that shows a clearer view of the X-shaped structure. Image via NASA/JPL-Caltech; D. Lang/Dunlap Institute.
Twilight is the time of day between daylight and darkness. Astronomers, the experts on nighttime, recognize three kinds of twilight.
After sunset. Photo: Loire Vignolle-Moritz
The 6-month period from January to June was our planet’s warmest half-year in the modern temperature record, which dates to 1880.
Mare Imbrium basin on the moon – the Man in the Moon’s right eye – might have been made by a protoplanet-sized impact, 3.8 billion years ago.
The lunar Mare Imbrium, or Sea of Rains, via Pete Lawrence's Moon guides.
One of the prettiest stories in all skylore surrounds this star. “On the 7th night of the 7th moon … “