Sign Up for Our Amazing Newsletter!
A daily update by email. Science news, great photos, sky alerts.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Goodbye to the dark side
Stunning view of Saturn's night side, looking toward the sunlit side of the rings, by Cassini spacecraft cameras. Cassini ended its mission on September 15, 2017.
October 4, 2017
Watch for Mars and Venus this week
How to see the close conjunction of the dazzling planet Venus and faint red planet Mars in the sunrise direction, throughout the first week of October 2017.
October 4, 2017
Large storm on sun sparked global aurora on Mars
Scientists said the solar event "lit up Mars like a light bulb." It was the biggest event of its kind so far observed by spacecraft in Mars orbit and on the surface.
October 3, 2017
Moon and planet-rise, seen from space
This timelapse video shows a peaceful and breathless moonrise from the International Space Station, with Venus, Mars and Mercury also in view.
October 3, 2017
Can you find the Big Dipper?
From 41 degrees N. - and farther north - the Big Dipper is circumpolar, meaning it never sets. But from more southerly latitudes, the Dipper is below your horizon each evening now. Want to see it? Here's how.
October 3, 2017
Farthest active inbound comet yet
Most comets become active only when near the sun. This one is active, but distant, between the orbits of Saturn and Uranus, where sunlight is 1/225th as bright as seen from Earth.
October 2, 2017
Waterglyph
Marc Toso tried 3 times to capture this ancient petroglyph known as a waterglyph, estimated to be between 2,000 and 1,000 years old. The 3rd time was the charm.
October 2, 2017
Scientists reveal secrets of lost continent Zealandia
Scientists have just returned from a major expedition to Zealandia, a "hidden" Earth continent, likely submerged beneath the sea surface more than 80 million years ago.
October 1, 2017
New Horizons’ discoveries keep coming
New ScienceCast video on recent results from New Horizons spacecraft data. Landslides on Charon. Possible snow on Pluto. Plus a preview of New Horizons' next target.
September 30, 2017
